Introduce a long‑lived `SecureString` passphrase instead of passing a string literal into `MigrateLegacyToDescriptor`.
This avoids constructing a temporary `SecureString` per invocation and prevents dangling‑pointer issues inside the migration logic.

```
error: bench_bitcoin 0x00067927: DW_TAG_member '_M_local_buf' refers to type 0x00000000000b3ba7 which extends beyond the bounds of 0x0006791d
* thread #1, name = 'b-test', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0xc8)
  * frame #0: 0x00005555556a3f33 bench_bitcoinstd::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) [inlined] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::length(this=<unavailable>) const at basic_string.h:1079:16
```

Introduce a long‑lived `SecureString` passphrase instead of passing a string literal into `MigrateLegacyToDescriptor`.
This avoids constructing a temporary `SecureString` per invocation and prevents dangling‑pointer issues inside the migration logic.

```
error: bench_bitcoin 0x00067927: DW_TAG_member '_M_local_buf' refers to type 0x00000000000b3ba7 which extends beyond the bounds of 0x0006791d
* thread #1, name = 'b-test', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0xc8)
  * frame #0: 0x00005555556a3f33 bench_bitcoinstd::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) [inlined] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::length(this=<unavailable>) const at basic_string.h:1079:16
```

Introduce a long‑lived `SecureString` passphrase instead of passing a string literal into `MigrateLegacyToDescriptor`.
This avoids constructing a temporary `SecureString` per invocation and prevents dangling‑pointer issues inside the migration logic.

```
error: bench_bitcoin 0x00067927: DW_TAG_member '_M_local_buf' refers to type 0x00000000000b3ba7 which extends beyond the bounds of 0x0006791d
* thread #1, name = 'b-test', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0xc8)
  * frame #0: 0x00005555556a3f33 bench_bitcoinstd::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) [inlined] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::length(this=<unavailable>) const at basic_string.h:1079:16
```

Introduce a long‑lived `SecureString` passphrase instead of passing a string literal into `MigrateLegacyToDescriptor`.
This avoids constructing a temporary `SecureString` per invocation and prevents dangling‑pointer issues inside the migration logic.

```
error: bench_bitcoin 0x00067927: DW_TAG_member '_M_local_buf' refers to type 0x00000000000b3ba7 which extends beyond the bounds of 0x0006791d
* thread #1, name = 'b-test', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0xc8)
  * frame #0: 0x00005555556a3f33 bench_bitcoinstd::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) [inlined] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::length(this=<unavailable>) const at basic_string.h:1079:16
```

Introduce a long‑lived `SecureString` passphrase instead of passing a string literal into `MigrateLegacyToDescriptor`.
This avoids constructing a temporary `SecureString` per invocation and prevents dangling‑pointer issues inside the migration logic.

```
error: bench_bitcoin 0x00067927: DW_TAG_member '_M_local_buf' refers to type 0x00000000000b3ba7 which extends beyond the bounds of 0x0006791d
* thread #1, name = 'b-test', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0xc8)
  * frame #0: 0x00005555556a3f33 bench_bitcoinstd::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) [inlined] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::length(this=<unavailable>) const at basic_string.h:1079:16
```

Introduce a long‑lived `SecureString` passphrase instead of passing a string literal into `MigrateLegacyToDescriptor`.
This avoids constructing a temporary `SecureString` per invocation and prevents dangling‑pointer issues inside the migration logic.

```
error: bench_bitcoin 0x00067927: DW_TAG_member '_M_local_buf' refers to type 0x00000000000b3ba7 which extends beyond the bounds of 0x0006791d
* thread #1, name = 'b-test', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0xc8)
  * frame #0: 0x00005555556a3f33 bench_bitcoinstd::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) [inlined] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::length(this=<unavailable>) const at basic_string.h:1079:16
```

Introduce a long‑lived `SecureString` passphrase instead of passing a string literal into `MigrateLegacyToDescriptor`.
This avoids constructing a temporary `SecureString` per invocation and prevents dangling‑pointer issues inside the migration logic.

```
error: bench_bitcoin 0x00067927: DW_TAG_member '_M_local_buf' refers to type 0x00000000000b3ba7 which extends beyond the bounds of 0x0006791d
* thread #1, name = 'b-test', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0xc8)
  * frame #0: 0x00005555556a3f33 bench_bitcoinstd::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) [inlined] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::length(this=<unavailable>) const at basic_string.h:1079:16
```

Introduce a long‑lived `SecureString` passphrase instead of passing a string literal into `MigrateLegacyToDescriptor`.
This avoids constructing a temporary `SecureString` per invocation and prevents dangling‑pointer issues inside the migration logic.

```
error: bench_bitcoin 0x00067927: DW_TAG_member '_M_local_buf' refers to type 0x00000000000b3ba7 which extends beyond the bounds of 0x0006791d
* thread #1, name = 'b-test', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0xc8)
  * frame #0: 0x00005555556a3f33 bench_bitcoinstd::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) [inlined] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::length(this=<unavailable>) const at basic_string.h:1079:16
```

cad39f8 bench: ensure wallet migration benchmark runs exactly once (Lőrinc)
c1f458a ci: re-enable all benchmark runs (Lőrinc)
1da11db bench: clean up migrated descriptor wallets via loader teardown (Lőrinc)

Pull request description:

  The low-priority `WalletMigration` benchmark existed for some time but was never run automatically in our CI.

  Although the failure first surfaced on Windows as a hang during temporary directory cleanup, it could also be reproduced on Linux and macOS when forcing multiple iterations (e.g. via a long `--min-time`).

  ### Root causes

  1. **Leaked open wallets on Windows**
     `MigrateLegacyToDescriptor` produces two new descriptor wallets (the primary spendable wallet and a companion watch‑only wallet). Without unloading them, their database files remained open in the `WalletContext`, blocking directory removal and hanging the test harness.

  <details><summary>Details</summary>

  ```bash
  what():  filesystem error: cannot remove all: The process cannot access the file because it is being used by another process [C:\Users\RUNNER\~1\AppData\Local\Temp\test_common bitcoin\WalletMigration\d8ffd89a7700ce01c31f] [C:\Users\RUNNER~1\AppData\Local\Temp\test_common bitcoin\WalletMigration\d8ffd89a7700ce01c31f\regtest\wallet.dat]
  ```

  </details>

  2. **Undefined behavior on repeated runs**
     The benchmark body calls `std::move(wallet)`, invalidating the local `wallet` pointer. Running more than one iteration causes a use-after-move by the sanitizers.

  <details><summary>Details</summary>

  ```bash
  error: bench_bitcoin 0x00067927: DW_TAG_member '_M_local_buf' refers to type 0x00000000000b3ba7 which extends beyond the bounds of 0x0006791d
  * thread #1, name = 'b-test', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0xc8)
    * frame #0: 0x00005555556a3f33 bench_bitcoin`... basic_string<char>::length(this=<unavailable>) const at basic_string.h:1079:16
  ```

  </details>

  ### Fixes

  - **Automatic wallet teardown**
    Wrap the benchmark in a `MakeWalletLoader` (owning a `WalletContext`), so that both migrated wallets are unloaded when the loader goes out of scope, eliminating any lingering open files.

  - **Re-enable benchmarks in CI**
    Drop the temporary filter in GitHub Actions. The `-sanity-check` run already executes each benchmark once, so `WalletMigration` now runs automatically without hangs or crashes.

  - **Single iteration**
    Configure the microbenchmark with `.epochs(1).epochIterations(1)`, ensuring the migration code runs exactly once and avoiding use-after-move.

  No measurable change in benchmark performance.

ACKs for top commit:
  maflcko:
    review ACK cad39f8 🍥
  furszy:
    utACK cad39f8
  hebasto:
    ACK cad39f8, tested on Ubuntu 25.04.

Tree-SHA512: 10343ce7ab9b63ba4f51a7673018215577ea7ec188e41d535a66d69d73b85bca6ba301c33f6920c02f8f7d686c75c65c4a4e9bdafb04b60be85d66aa743cfa20

These were fixed im previous commits:
    INFO: Seed: 3018625440
    INFO: Loaded 1 modules   (641435 inline 8-bit counters): 641435 [0x5810b64ebb78, 0x5810b6588513),
    INFO: Loaded 1 PC tables (641435 PCs): 641435 [0x5810b6588518,0x5810b6f51ec8),
    INFO:     1859 files found in /ci_container_base/ci/scratch/qa-assets/fuzz_corpora/coins_view
    INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 1005297 bytes
    INFO: seed corpus: files: 1859 min: 2b max: 1005297b total: 48403597b rss: 111Mb
    /ci_container_base/src/coins.cpp:133:22: runtime error: unsigned integer overflow: 0 - 64 cannot be represented in type 'size_t' (aka 'unsigned long')
        #0 0x5810b3768b67 in CCoinsViewCache::SpendCoin(COutPoint const&, Coin*) /ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/./coins.cpp:133:22
        #1 0x5810b3095ff0 in coins_view_fuzz_target(std::span<unsigned char const, 18446744073709551615ul>)::$_4::operator()() const /ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/test/fuzz
    /./test/fuzz/coins_view.cpp:87:40
    ...
    SUMMARY: UndefinedBehaviorSanitizer: unsigned-integer-overflow /ci_container_base/src/coins.cpp:133:22

These were fixed im previous commits:
    INFO: Seed: 3018625440
    INFO: Loaded 1 modules   (641435 inline 8-bit counters): 641435 [0x5810b64ebb78, 0x5810b6588513),
    INFO: Loaded 1 PC tables (641435 PCs): 641435 [0x5810b6588518,0x5810b6f51ec8),
    INFO:     1859 files found in /ci_container_base/ci/scratch/qa-assets/fuzz_corpora/coins_view
    INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 1005297 bytes
    INFO: seed corpus: files: 1859 min: 2b max: 1005297b total: 48403597b rss: 111Mb
    /ci_container_base/src/coins.cpp:133:22: runtime error: unsigned integer overflow: 0 - 64 cannot be represented in type 'size_t' (aka 'unsigned long')
        #0 0x5810b3768b67 in CCoinsViewCache::SpendCoin(COutPoint const&, Coin*) /ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/./coins.cpp:133:22
        #1 0x5810b3095ff0 in coins_view_fuzz_target(std::span<unsigned char const, 18446744073709551615ul>)::$_4::operator()() const /ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/test/fuzz
    /./test/fuzz/coins_view.cpp:87:40
    ...
    SUMMARY: UndefinedBehaviorSanitizer: unsigned-integer-overflow /ci_container_base/src/coins.cpp:133:22

These were fixed im previous commits:
    INFO: Seed: 3018625440
    INFO: Loaded 1 modules   (641435 inline 8-bit counters): 641435 [0x5810b64ebb78, 0x5810b6588513),
    INFO: Loaded 1 PC tables (641435 PCs): 641435 [0x5810b6588518,0x5810b6f51ec8),
    INFO:     1859 files found in /ci_container_base/ci/scratch/qa-assets/fuzz_corpora/coins_view
    INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 1005297 bytes
    INFO: seed corpus: files: 1859 min: 2b max: 1005297b total: 48403597b rss: 111Mb
    /ci_container_base/src/coins.cpp:133:22: runtime error: unsigned integer overflow: 0 - 64 cannot be represented in type 'size_t' (aka 'unsigned long')
        #0 0x5810b3768b67 in CCoinsViewCache::SpendCoin(COutPoint const&, Coin*) /ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/./coins.cpp:133:22
        #1 0x5810b3095ff0 in coins_view_fuzz_target(std::span<unsigned char const, 18446744073709551615ul>)::$_4::operator()() const /ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/test/fuzz
    /./test/fuzz/coins_view.cpp:87:40
    ...
    SUMMARY: UndefinedBehaviorSanitizer: unsigned-integer-overflow /ci_container_base/src/coins.cpp:133:22

These were fixed im previous commits:
    INFO: Seed: 3018625440
    INFO: Loaded 1 modules   (641435 inline 8-bit counters): 641435 [0x5810b64ebb78, 0x5810b6588513),
    INFO: Loaded 1 PC tables (641435 PCs): 641435 [0x5810b6588518,0x5810b6f51ec8),
    INFO:     1859 files found in /ci_container_base/ci/scratch/qa-assets/fuzz_corpora/coins_view
    INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 1005297 bytes
    INFO: seed corpus: files: 1859 min: 2b max: 1005297b total: 48403597b rss: 111Mb
    /ci_container_base/src/coins.cpp:133:22: runtime error: unsigned integer overflow: 0 - 64 cannot be represented in type 'size_t' (aka 'unsigned long')
        #0 0x5810b3768b67 in CCoinsViewCache::SpendCoin(COutPoint const&, Coin*) /ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/./coins.cpp:133:22
        #1 0x5810b3095ff0 in coins_view_fuzz_target(std::span<unsigned char const, 18446744073709551615ul>)::$_4::operator()() const /ci_container_base/ci/scratch/build-x86_64-pc-linux-gnu/src/test/fuzz
    /./test/fuzz/coins_view.cpp:87:40
    ...
    SUMMARY: UndefinedBehaviorSanitizer: unsigned-integer-overflow /ci_container_base/src/coins.cpp:133:22

Using Clang clang version 20.1.6 (Fedora 20.1.6-9.fc43) and:
```bash
export CC=clang
export CXX=clang++
cmake -B build -DBUILD_GUI=ON -DSANITIZERS=address
cmake --build build
export LSAN_OPTIONS="suppressions=/root/bitcoin/test/sanitizer_suppressions/lsan"
ctest --test-dir build
```

```bash
Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 1589ms
********* Finished testing of AddressBookTests *********

=================================================================
==21869==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 88 byte(s) in 1 object(s) allocated from:
    #0 0xaaaab5d5af40 in operator new(unsigned long) (/root/bitcoin/build/bin/test_bitcoin-qt+0x39af40) (BuildId: c0e038f1c507ea6860d1cfd499ac54ad83359872)
    #1 0xffff8c8f56cc in QLayoutPrivate::createWidgetItem(QLayout const*, QWidget*) (/lib64/libQt6Widgets.so.6+0x1a56cc) (BuildId: 8b7b9e470f4d4cd920282a4f963abb01225814fa)
    #2 0xffff8c8d2f90 in QBoxLayout::insertWidget(int, QWidget*, int, QFlags<Qt::AlignmentFlag>) (/lib64/libQt6Widgets.so.6+0x182f90) (BuildId: 8b7b9e470f4d4cd920282a4f963abb01225814fa)
    #3 0xaaaab5fc7188 in SendCoinsDialog::addEntry() /root/bitcoin/build/src/qt/./qt/sendcoinsdialog.cpp:596:18
    #4 0xaaaab5fc4eec in SendCoinsDialog::SendCoinsDialog(PlatformStyle const*, QWidget*) /root/bitcoin/build/src/qt/./qt/sendcoinsdialog.cpp:84:5
    #5 0xaaaab5da67ac in (anonymous namespace)::MiniGUI::MiniGUI(interfaces::Node&, PlatformStyle const*) /root/bitcoin/build/src/qt/test/./qt/test/wallettests.cpp:235:75
    #6 0xaaaab5da2000 in (anonymous namespace)::TestGUI(interfaces::Node&, std::shared_ptr<wallet::CWallet> const&) /root/bitcoin/build/src/qt/test/./qt/test/wallettests.cpp:270:13
    #7 0xaaaab5d9ebc8 in (anonymous namespace)::TestGUI(interfaces::Node&) /root/bitcoin/build/src/qt/test/./qt/test/wallettests.cpp:453:5
    #8 0xaaaab5d9ebc8 in WalletTests::walletTests() /root/bitcoin/build/src/qt/test/./qt/test/wallettests.cpp:475:5
    #9 0xffff8b1c5314 in QMetaMethodInvoker::invokeImpl(QMetaMethod, void*, Qt::ConnectionType, long long, void const* const*, char const* const*, QtPrivate::QMetaTypeInterface const* const*) (/lib64/libQt6Core.so.6+0x195314) (BuildId: eacb2d1228362560e5df1a1ce496c99ad61960e7)
    #10 0xffff8b1c5dc8 in QMetaMethod::invokeImpl(QMetaMethod, void*, Qt::ConnectionType, long long, void const* const*, char const* const*, QtPrivate::QMetaTypeInterface const* const*) (/lib64/libQt6Core.so.6+0x195dc8) (BuildId: eacb2d1228362560e5df1a1ce496c99ad61960e7)
    #11 0xffff8cf57c54  (/lib64/libQt6Test.so.6+0x27c54) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
    #12 0xffff8cf5fa18  (/lib64/libQt6Test.so.6+0x2fa18) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
    #13 0xffff8cf6067c  (/lib64/libQt6Test.so.6+0x3067c) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
    #14 0xffff8cf610a4  (/lib64/libQt6Test.so.6+0x310a4) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
    #15 0xffff8cf61aa4 in QTest::qRun() (/lib64/libQt6Test.so.6+0x31aa4) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
    #16 0xffff8cf61eb4 in QTest::qExec(QObject*, int, char**) (/lib64/libQt6Test.so.6+0x31eb4) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
    #17 0xaaaab5d7d77c in main /root/bitcoin/build/src/qt/test/./qt/test/test_main.cpp:95:30
    #18 0xffff8aad6398 in __libc_start_call_main (/lib64/libc.so.6+0x26398) (BuildId: 627f878dd454ee3cc1dfdbd347bb565f1ffb53e7)
    #19 0xffff8aad6478 in __libc_start_main@GLIBC_2.17 (/lib64/libc.so.6+0x26478) (BuildId: 627f878dd454ee3cc1dfdbd347bb565f1ffb53e7)
    #20 0xaaaab5c74cac in _start (/root/bitcoin/build/bin/test_bitcoin-qt+0x2b4cac) (BuildId: c0e038f1c507ea6860d1cfd499ac54ad83359872)
```

This happens when building using depends:
```bash
Indirect leak of 24 byte(s) in 1 object(s) allocated from:
    #0 0xaaaabdbe86f8 in malloc (/root/bitcoin/build/bin/test_bitcoin-qt+0x4386f8) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #1 0xfbff97f8c164  (<unknown module>)
    #2 0xaaaabf0cfaa4 in QDBusConnectionPrivate::QDBusConnectionPrivate() (/root/bitcoin/build/bin/test_bitcoin-qt+0x191faa4) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #3 0xaaaabf0c9e30 in QDBusConnectionManager::doConnectToStandardBus(QDBusConnection::BusType, QString const&, bool) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1919e30) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #4 0xaaaabf0cb0e4 in QtPrivate::QCallableObject<QDBusConnectionPrivate* (QDBusConnectionManager::*)(QDBusConnection::BusType, QString const&, bool), QtPrivate::List<QDBusConnection::BusType&, QString const&, bool&>, QDBusConnectionPrivate*>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x191b0e4) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #5 0xaaaabf5cbaf0 in QObject::event(QEvent*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1e1baf0) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #6 0xaaaabf5a4ce0 in QCoreApplicationPrivate::notify_helper(QObject*, QEvent*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1df4ce0) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #7 0xaaaabf5a486c in QCoreApplication::notifyInternal2(QObject*, QEvent*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1df486c) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #8 0xaaaabf5a575c in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1df575c) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #9 0xaaaabf66b858 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1ebb858) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #10 0xaaaabf5a9e3c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1df9e3c) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #11 0xaaaabf632a44 in QThread::exec() (/root/bitcoin/build/bin/test_bitcoin-qt+0x1e82a44) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #12 0xaaaabf0c9bd0 in QDBusConnectionManager::run() (/root/bitcoin/build/bin/test_bitcoin-qt+0x1919bd0) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #13 0xaaaabf669c30 in QThreadPrivate::start(void*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1eb9c30) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
    #14 0xaaaabdbe5f2c in asan_thread_start(void*) asan_interceptors.cpp.o
    #15 0xffff99538608 in thread_start (/lib64/libc.so.6+0xf8608) (BuildId: 627f878dd454ee3cc1dfdbd347bb565f1ffb53e7)

SUMMARY: AddressSanitizer: 3592 byte(s) leaked in 37 allocation(s).
```

5be31b2 lsan: add more Qt suppressions (fanquake)

Pull request description:

  Using Clang clang version 20.1.6 (Fedora 20.1.6-9.fc43) and:
  ```bash
  export CC=clang
  export CXX=clang++
  cmake -B build -DBUILD_GUI=ON -DSANITIZERS=address
  cmake --build build
  export LSAN_OPTIONS="suppressions=/root/bitcoin/test/sanitizer_suppressions/lsan"
  ctest --test-dir build
  ```

  ```bash
  Totals: 3 passed, 0 failed, 0 skipped, 0 blacklisted, 1589ms
  ********* Finished testing of AddressBookTests *********

  =================================================================
  ==21869==ERROR: LeakSanitizer: detected memory leaks

  Direct leak of 88 byte(s) in 1 object(s) allocated from:
      #0 0xaaaab5d5af40 in operator new(unsigned long) (/root/bitcoin/build/bin/test_bitcoin-qt+0x39af40) (BuildId: c0e038f1c507ea6860d1cfd499ac54ad83359872)
      #1 0xffff8c8f56cc in QLayoutPrivate::createWidgetItem(QLayout const*, QWidget*) (/lib64/libQt6Widgets.so.6+0x1a56cc) (BuildId: 8b7b9e470f4d4cd920282a4f963abb01225814fa)
      #2 0xffff8c8d2f90 in QBoxLayout::insertWidget(int, QWidget*, int, QFlags<Qt::AlignmentFlag>) (/lib64/libQt6Widgets.so.6+0x182f90) (BuildId: 8b7b9e470f4d4cd920282a4f963abb01225814fa)
      #3 0xaaaab5fc7188 in SendCoinsDialog::addEntry() /root/bitcoin/build/src/qt/./qt/sendcoinsdialog.cpp:596:18
      #4 0xaaaab5fc4eec in SendCoinsDialog::SendCoinsDialog(PlatformStyle const*, QWidget*) /root/bitcoin/build/src/qt/./qt/sendcoinsdialog.cpp:84:5
      #5 0xaaaab5da67ac in (anonymous namespace)::MiniGUI::MiniGUI(interfaces::Node&, PlatformStyle const*) /root/bitcoin/build/src/qt/test/./qt/test/wallettests.cpp:235:75
      #6 0xaaaab5da2000 in (anonymous namespace)::TestGUI(interfaces::Node&, std::shared_ptr<wallet::CWallet> const&) /root/bitcoin/build/src/qt/test/./qt/test/wallettests.cpp:270:13
      #7 0xaaaab5d9ebc8 in (anonymous namespace)::TestGUI(interfaces::Node&) /root/bitcoin/build/src/qt/test/./qt/test/wallettests.cpp:453:5
      #8 0xaaaab5d9ebc8 in WalletTests::walletTests() /root/bitcoin/build/src/qt/test/./qt/test/wallettests.cpp:475:5
      #9 0xffff8b1c5314 in QMetaMethodInvoker::invokeImpl(QMetaMethod, void*, Qt::ConnectionType, long long, void const* const*, char const* const*, QtPrivate::QMetaTypeInterface const* const*) (/lib64/libQt6Core.so.6+0x195314) (BuildId: eacb2d1228362560e5df1a1ce496c99ad61960e7)
      #10 0xffff8b1c5dc8 in QMetaMethod::invokeImpl(QMetaMethod, void*, Qt::ConnectionType, long long, void const* const*, char const* const*, QtPrivate::QMetaTypeInterface const* const*) (/lib64/libQt6Core.so.6+0x195dc8) (BuildId: eacb2d1228362560e5df1a1ce496c99ad61960e7)
      #11 0xffff8cf57c54  (/lib64/libQt6Test.so.6+0x27c54) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
      #12 0xffff8cf5fa18  (/lib64/libQt6Test.so.6+0x2fa18) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
      #13 0xffff8cf6067c  (/lib64/libQt6Test.so.6+0x3067c) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
      #14 0xffff8cf610a4  (/lib64/libQt6Test.so.6+0x310a4) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
      #15 0xffff8cf61aa4 in QTest::qRun() (/lib64/libQt6Test.so.6+0x31aa4) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
      #16 0xffff8cf61eb4 in QTest::qExec(QObject*, int, char**) (/lib64/libQt6Test.so.6+0x31eb4) (BuildId: 96bb1cdeead53af0ced36d7970cf9cd79c4c4ccd)
      #17 0xaaaab5d7d77c in main /root/bitcoin/build/src/qt/test/./qt/test/test_main.cpp:95:30
      #18 0xffff8aad6398 in __libc_start_call_main (/lib64/libc.so.6+0x26398) (BuildId: 627f878dd454ee3cc1dfdbd347bb565f1ffb53e7)
      #19 0xffff8aad6478 in __libc_start_main@GLIBC_2.17 (/lib64/libc.so.6+0x26478) (BuildId: 627f878dd454ee3cc1dfdbd347bb565f1ffb53e7)
      #20 0xaaaab5c74cac in _start (/root/bitcoin/build/bin/test_bitcoin-qt+0x2b4cac) (BuildId: c0e038f1c507ea6860d1cfd499ac54ad83359872)
  ```

  This happens when building using depends:
  ```bash
  Indirect leak of 24 byte(s) in 1 object(s) allocated from:
      #0 0xaaaabdbe86f8 in malloc (/root/bitcoin/build/bin/test_bitcoin-qt+0x4386f8) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #1 0xfbff97f8c164  (<unknown module>)
      #2 0xaaaabf0cfaa4 in QDBusConnectionPrivate::QDBusConnectionPrivate() (/root/bitcoin/build/bin/test_bitcoin-qt+0x191faa4) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #3 0xaaaabf0c9e30 in QDBusConnectionManager::doConnectToStandardBus(QDBusConnection::BusType, QString const&, bool) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1919e30) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #4 0xaaaabf0cb0e4 in QtPrivate::QCallableObject<QDBusConnectionPrivate* (QDBusConnectionManager::*)(QDBusConnection::BusType, QString const&, bool), QtPrivate::List<QDBusConnection::BusType&, QString const&, bool&>, QDBusConnectionPrivate*>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x191b0e4) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #5 0xaaaabf5cbaf0 in QObject::event(QEvent*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1e1baf0) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #6 0xaaaabf5a4ce0 in QCoreApplicationPrivate::notify_helper(QObject*, QEvent*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1df4ce0) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #7 0xaaaabf5a486c in QCoreApplication::notifyInternal2(QObject*, QEvent*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1df486c) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #8 0xaaaabf5a575c in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1df575c) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #9 0xaaaabf66b858 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1ebb858) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #10 0xaaaabf5a9e3c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1df9e3c) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #11 0xaaaabf632a44 in QThread::exec() (/root/bitcoin/build/bin/test_bitcoin-qt+0x1e82a44) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #12 0xaaaabf0c9bd0 in QDBusConnectionManager::run() (/root/bitcoin/build/bin/test_bitcoin-qt+0x1919bd0) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #13 0xaaaabf669c30 in QThreadPrivate::start(void*) (/root/bitcoin/build/bin/test_bitcoin-qt+0x1eb9c30) (BuildId: dd54811dc11325890f7bac3e3a49d38f5a7ffef5)
      #14 0xaaaabdbe5f2c in asan_thread_start(void*) asan_interceptors.cpp.o
      #15 0xffff99538608 in thread_start (/lib64/libc.so.6+0xf8608) (BuildId: 627f878dd454ee3cc1dfdbd347bb565f1ffb53e7)

  SUMMARY: AddressSanitizer: 3592 byte(s) leaked in 37 allocation(s).
  ```

ACKs for top commit:
  maflcko:
    lgtm ACK 5be31b2

Tree-SHA512: 0c33661c7ec83ea9b874c1ee4ee2de513131690287363e216a88560dfb31a59ef563a50af756c86a991583aa64a600a74e20fd5d6a104cf4c0a27532de8d2211

67dc752 cmake, test: Disable tests instead of ignoring them (Hennadii Stepanov)
bb9157d cmake, refactor: Switch to `Python3::Interpreter` imported target (Hennadii Stepanov)

Pull request description:

  This PR:

  1. Switches to a modern CMake approach by using the `Python3::Interpreter` imported target, which is more robust than using variables.

  2. Disables the `util_rpcauth_test` test explicitly instead of silently ignoring it.

  A build and test log for the case when Python is unavailable is provided below:
  ```
  $ cmake -B build
  $ cmake --build build -j 16
  $ ctest --test-dir build -j $(nproc) -R "^util"
  Internal ctest changing into directory: /bitcoin/build
  Test project /bitcoin/build
      Start 115: util_tests
      Start 117: util_trace_tests
      Start 114: util_string_tests
      Start 116: util_threadnames_tests
      Start   1: util_rpcauth_test
  1/5 Test   #1: util_rpcauth_test ................***Not Run (Disabled)   0.00 sec
  2/5 Test bitcoin#114: util_string_tests ................   Passed    0.11 sec
  3/5 Test bitcoin#117: util_trace_tests .................   Passed    0.11 sec
  4/5 Test bitcoin#116: util_threadnames_tests ...........   Passed    0.11 sec
  5/5 Test bitcoin#115: util_tests .......................   Passed    0.13 sec

  100% tests passed, 0 tests failed out of 4

  Total Test time (real) =   0.13 sec

  The following tests did not run:
    1 - util_rpcauth_test (Disabled)
  ```

ACKs for top commit:
  purpleKarrot:
    ACK 67dc752
  janb84:
    tACK 67dc752

Tree-SHA512: 5fc7ebe31ac03f4b8a53ecfcfc1cace0f647a1d2c989651988edae96bdfbbe2dee171714e57cb028e65ead1bb40806a82d9821746451dbf005538601fd33ea88

…xec in RunCommandJSON"

faa1c3e Revert "Merge bitcoin#32343: common: Close non-std fds before exec in RunCommandJSON" (MarcoFalke)

Pull request description:

  After a fork() in a multithreaded program, the child can safely
  call only async-signal-safe functions (see [signal-safety(7)](https://www.man7.org/linux/man-pages/man7/signal-safety.7.html))
  until such time as it calls execv.

  The standard library (`std` namespace) is not async-signal-safe. Also, `throw`, isn't.

  There was an alternative implementation using `readdir` (bitcoin#32529), but that isn't async-signal-safe either, and that implementation was still using `throw`.

  So temporarily revert this feature.

  A follow-up in the future can add it back, using only async-signal-safe functions, or by using a different approach.

  Fixes bitcoin#32524
  Fixes bitcoin#33015
  Fixes bitcoin#32855

  For reference, a failure can manifest in the GCC debug mode:

  * While `fork`ing, a debug mode mutex is held (by any other thread).
  * The `fork`ed child tries to use the stdard libary before `execv` and deadlocks.

  This may look like the following:

  ```
  (gdb) thread apply all bt

  Thread 1 (Thread 0xf58f4b40 (LWP 774911) "b-httpworker.2"):
  #0  0xf7f4f589 in __kernel_vsyscall ()
  #1  0xf79e467e in ?? () from /lib32/libc.so.6
  #2  0xf79eb582 in pthread_mutex_lock () from /lib32/libc.so.6
  #3  0xf7d93bf2 in ?? () from /lib32/libstdc++.so.6
  #4  0xf7d93f36 in __gnu_debug::_Safe_iterator_base::_M_attach(__gnu_debug::_Safe_sequence_base*, bool) () from /lib32/libstdc++.so.6
  #5  0x5668810a in __gnu_debug::_Safe_iterator_base::_Safe_iterator_base (this=0xf58f13ac, __seq=0xf58f13f8, __constant=false) at /bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/debug/safe_base.h:91
  #6  0x56ddfb50 in __gnu_debug::_Safe_iterator<__gnu_cxx::__normal_iterator<int*, std::__cxx1998::vector<int, std::allocator<int> > >, std::__debug::vector<int, std::allocator<int> >, std::forward_iterator_tag>::_Safe_iterator (this=0xf58f13a8, __i=3, __seq=0xf58f13f8) at /bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/debug/safe_iterator.h:162
  #7  0x56ddfacb in __gnu_debug::_Safe_iterator<__gnu_cxx::__normal_iterator<int*, std::__cxx1998::vector<int, std::allocator<int> > >, std::__debug::vector<int, std::allocator<int> >, std::bidirectional_iterator_tag>::_Safe_iterator (this=0xf58f13a8, __i=3, __seq=0xf58f13f8) at /bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/debug/safe_iterator.h:539
  #8  0x56ddfa5b in __gnu_debug::_Safe_iterator<__gnu_cxx::__normal_iterator<int*, std::__cxx1998::vector<int, std::allocator<int> > >, std::__debug::vector<int, std::allocator<int> >, std::random_access_iterator_tag>::_Safe_iterator (this=0xf58f13a8, __i=3, __seq=0xf58f13f8) at /bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/debug/safe_iterator.h:687
  #9  0x56ddd3f6 in std::__debug::vector<int, std::allocator<int> >::begin (this=0xf58f13f8) at /bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/debug/vector:300
  #10 0x57d83701 in subprocess::detail::Child::execute_child (this=0xf58f156c) at ./util/subprocess.h:1372
  #11 0x57d80a7c in subprocess::Popen::execute_process (this=0xf58f1cd8) at ./util/subprocess.h:1231
  #12 0x57d6d2b4 in subprocess::Popen::Popen<subprocess::input, subprocess::output, subprocess::error, subprocess::close_fds> (this=0xf58f1cd8, cmd_args="fake.py enumerate", args=..., args=..., args=..., args=...) at ./util/subprocess.h:964
  #13 0x57d6b597 in RunCommandParseJSON (str_command="fake.py enumerate", str_std_in="") at ./common/run_command.cpp:27
  #14 0x57a90547 in ExternalSigner::Enumerate (command="fake.py", signers=std::__debug::vector of length 0, capacity 0, chain="regtest") at ./external_signer.cpp:28
  #15 0x56defdab in enumeratesigners()::$_0::operator()(RPCHelpMan const&, JSONRPCRequest const&) const (this=0xf58f2ba0, self=..., request=...) at ./rpc/external_signer.cpp:51
  ...
  (truncated, only one thread exists)
  ```

ACKs for top commit:
  fanquake:
    ACK faa1c3e
  darosior:
    ACK faa1c3e

Tree-SHA512: 602da5f2eba08d7fe01ba19baf411e287ae27fe2d4b82f41734e05b7b1d938ce94cc0041e86ba677284fa92838e96ebee687023ff28047e2b036fd9a53567e0a

The `-assumevalid` option skips script verification for a specified block and all its ancestors during Initial Block Download.
Many new users are surprised when this suddenly slows their node to a halt.
This commit adds a log message to clearly indicate when this optimization ends and full validation begins (and vice versa).

When using `-assumeutxo`, logging is suppressed for the active assumed-valid chainstate and for the background validation chainstate to avoid the confusing toggles.

-------

> cmake -B build && cmake --build build && mkdir -p demo && build/bin/bitcoind -datadir=demo -stopatheight=500 | grep 'signature validation'

```
2025-08-08T20:59:21Z Disabling signature validations at block #1 (00000000839a8e6886ab5951d76f411475428afc90947ee320161bbf18eb6048).
2025-08-08T20:59:21Z Enabling signature validations at block bitcoin#100 (000000007bc154e0fa7ea32218a72fe2c1bb9f86cf8c9ebf9a715ed27fdb229a).
2025-08-08T20:59:21Z Disabling signature validations at block bitcoin#200 (000000008f1a7008320c16b8402b7f11e82951f44ca2663caf6860ab2eeef320).
2025-08-08T20:59:21Z Enabling signature validations at block bitcoin#300 (0000000062b69e4a2c3312a5782d7798b0711e9ebac065cd5d19f946439f8609).
```

The `-assumevalid` option skips script verification for a specified block and all its ancestors during Initial Block Download.
Many new users are surprised when this suddenly slows their node to a halt.
This commit adds a log message to clearly indicate when this optimization ends and full validation begins (and vice versa).

When using `-assumeutxo`, logging is suppressed for the active assumed-valid chainstate and for the background validation chainstate to avoid the confusing toggles.

-------

> cmake -B build && cmake --build build && mkdir -p demo && build/bin/bitcoind -datadir=demo -stopatheight=500 | grep 'signature validation'

```
2025-08-08T20:59:21Z Disabling signature validations at block #1 (00000000839a8e6886ab5951d76f411475428afc90947ee320161bbf18eb6048).
2025-08-08T20:59:21Z Enabling signature validations at block bitcoin#100 (000000007bc154e0fa7ea32218a72fe2c1bb9f86cf8c9ebf9a715ed27fdb229a).
2025-08-08T20:59:21Z Disabling signature validations at block bitcoin#200 (000000008f1a7008320c16b8402b7f11e82951f44ca2663caf6860ab2eeef320).
2025-08-08T20:59:21Z Enabling signature validations at block bitcoin#300 (0000000062b69e4a2c3312a5782d7798b0711e9ebac065cd5d19f946439f8609).
```

…hange

fab2980 assumevalid: log every script validation state change (Lőrinc)

Pull request description:

  The `-assumevalid` option skips script verification for a specified block and all its ancestors during Initial Block Download.
  Many new [users are surprised](bitcoin#32832) when this suddenly slows their node to a halt.
  This commit adds a log message to clearly indicate when this optimization ends and full validation begins (and vice versa).

  <details>
  <summary>Testing instructions</summary>

  The behavior can easily be tested by adding this before the new log:
  ```C++
      // TODO hack to enable/disable script checks based on block height for testing purposes
           if (pindex->nHeight < 100) fScriptChecks = false;
      else if (pindex->nHeight < 200) fScriptChecks = true;
      else if (pindex->nHeight < 300) fScriptChecks = false;
      else if (pindex->nHeight < 400) fScriptChecks = true;
  ```
  and exercise the new code with:
  ```bash
  cmake -B build && cmake --build build && mkdir -p demo && build/bin/bitcoind -datadir=demo -stopatheight=500 | grep 'signature validation'
  ```
  showing something like:
  * Disabling signature validations at block #1 (00000000839a8e6886ab5951d76f411475428afc90947ee320161bbf18eb6048).
  * Enabling signature validations at block bitcoin#100 (000000007bc154e0fa7ea32218a72fe2c1bb9f86cf8c9ebf9a715ed27fdb229a).
  * Disabling signature validations at block bitcoin#200 (000000008f1a7008320c16b8402b7f11e82951f44ca2663caf6860ab2eeef320).
  * Enabling signature validations at block bitcoin#300 (0000000062b69e4a2c3312a5782d7798b0711e9ebac065cd5d19f946439f8609).

  </details>

ACKs for top commit:
  achow101:
    ACK fab2980
  ajtowns:
    crACK fab2980
  davidgumberg:
    untested crACK bitcoin@fab2980

Tree-SHA512: e90b66f7423b639356daace476942ce83e65e70466544394cbe2f15738bdbf716163eaf590c64c5448f9b41aeeaafe3342c48c6a7a478678a70b0310ca94e11d