add doge image description

add doge image description

c521b3ac6 Merge #11: fixup define checks. Cleans up some oopses from #5.
8b1cd3753 fixup define checks. Cleans up some oopses from #5.
6b1508d6d Merge #6: Fixes typo
fceb80542 Merge #10: Clean up compile-time warnings (gcc 7.1)
0ec2a343f Clean up compile-time warnings (gcc 7.1)
d4c268a35 Merge #5: Move helper functions out of sse4.2 object
8d4eb0847 Add HasAcceleratedCRC32C to port_win.h
77cfbfd25 crc32: move helper functions out of port_posix_sse.cc
4c1e9e016 silence compiler warnings about uninitialized variables
495316485 Merge #2: Prefer std::atomic over MemoryBarrier
2953978ef Fixes typo
f134284a1 Merge #1: Merge upstream LevelDB 1.20
ba8a445fd Prefer std::atomic over MemoryBarrier

git-subtree-dir: src/leveldb
git-subtree-split: c521b3ac654cfbe009c575eacf7e5a6e189bb5bb

7890db9 Merge #11: Remove deprecated std pair wrappers
40e3485 Merge #14: Cleaned up namespace imports to reduce symbol collisions
85052a4 Remove deprecated std::pair wrappers
d208f98 Cleaned up namespace imports to reduce symbol collisions

git-subtree-dir: src/univalue
git-subtree-split: 7890db9

85052a4 Remove deprecated std::pair wrappers (Karel Bilek)

Pull request description:

  These are deprecated and no longer used in Bitcoin Core.

Tree-SHA512: 774c9b84f88e0c5e2062b3d7f03399d9909830d044bc3cf8dfcd45e58f48072ce527f471360cb36594e898e625d965b71436559bff2bb4b368255b9f1e26f722

Otherwise it is not possible to run bench_bitcoin with clang-12 + ASAN
compiled.

Output:

$ src/bench/bench_bitcoin
bench/nanobench.h:1107:15: runtime error: left shift of 4982565676696827473 by 27 places cannot be represented in type 'uint64_t' (aka 'unsigned long')
    #0 0x5623d6a13137 in ankerl::nanobench::Rng::rotl(unsigned long, unsigned int) /bitcoin/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/./bench/nanobench.h:1107:15
    #1 0x5623d6a13137 in ankerl::nanobench::Rng::operator()() /bitcoin/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/./bench/nanobench.h:1075:10
    #2 0x5623d6a05c5b in ankerl::nanobench::Rng::Rng(unsigned long) /bitcoin/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/./bench/nanobench.h:3135:9
    #3 0x5623d6a0ca51 in ankerl::nanobench::detail::IterationLogic::Impl::Impl(ankerl::nanobench::Bench const&) /bitcoin/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/./bench/nanobench.h:2206:13
    #4 0x5623d69f8f73 in ankerl::nanobench::detail::IterationLogic::IterationLogic(ankerl::nanobench::Bench const&) /bitcoin/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/./bench/nanobench.h:2215:18
    #5 0x5623d690f165 in ankerl::nanobench::Bench& ankerl::nanobench::Bench::run<AddrManAdd(ankerl::nanobench::Bench&)::$_0>(AddrManAdd(ankerl::nanobench::Bench&)::$_0&&) /bitcoin/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/./bench/nanobench.h:1114:28
    #6 0x5623d690e26e in AddrManAdd(ankerl::nanobench::Bench&) /bitcoin/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/bench/addrman.cpp:76:11
    #7 0x5623d69279d6 in void std::__invoke_impl<void, void (*&)(ankerl::nanobench::Bench&), ankerl::nanobench::Bench&>(std::__invoke_other, void (*&)(ankerl::nanobench::Bench&), ankerl::nanobench::Bench&) /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/invoke.h:60:14
    #8 0x5623d6927921 in std::enable_if<is_invocable_r_v<void, void (*&)(ankerl::nanobench::Bench&), ankerl::nanobench::Bench&>, void>::type std::__invoke_r<void, void (*&)(ankerl::nanobench::Bench&), ankerl::nanobench::Bench&>(void (*&)(ankerl::nanobench::Bench&), ankerl::nanobench::Bench&) /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/invoke.h:110:2
    #9 0x5623d692775f in std::_Function_handler<void (ankerl::nanobench::Bench&), void (*)(ankerl::nanobench::Bench&)>::_M_invoke(std::_Any_data const&, ankerl::nanobench::Bench&) /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/std_function.h:291:9
    #10 0x5623d692dbd5 in std::function<void (ankerl::nanobench::Bench&)>::operator()(ankerl::nanobench::Bench&) const /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/std_function.h:622:14
    #11 0x5623d692cd44 in benchmark::BenchRunner::RunAll(benchmark::Args const&) /bitcoin/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/bench/bench.cpp:65:13
    #12 0x5623d69282bf in main /bitcoin/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/bench/bench_bitcoin.cpp:63:5
    #13 0x7f6812010564 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x28564)
    #14 0x5623d685f4dd in _start (/bitcoin/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/bench/bench_bitcoin+0x13754dd)

SUMMARY: UndefinedBehaviorSanitizer: invalid-shift-base bench/nanobench.h:1107:15 in

$ clang --version
Ubuntu clang version 12.0.0-1ubuntu1
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

a44caf65f Merge bitcoin-core/univalue-subtree#28: Import fixes for sanitizer reported issues
135254331 Import fixes for sanitizer reported issues
d5fb86940 refactor: use c++11 range based for loop in checkObject
ff9c37930 refactor: Use nullptr (c++11) instead of NULL
08a99754d build: use ax_cxx_compile_stdcxx.m4 to check for C++11 support
66d3713ce Merge bitcoin-core/univalue-subtree#29: ci: travis -> cirrus
808d48729 ci: travis -> cirrus
c390ac375 Merge bitcoin-core/univalue-subtree#19: Split sources for easier buildsystem integration
4a5b0a1c6 build: Move source entries out to sources.mk
6c7d94b33 build: cleanup wonky gen usage
a222637 Merge dogecoin#23: Merge changes from jgarzik/univalue@1ae6a23
98fadc0 Merge dogecoin#24: Push bool into array correctly
5f03f1f Push bool into array correctly
f77d0f7 Merge commit '1ae6a231a0169938eb3972c1d48dd17cba5947e1' into HEAD
98261b1 Merge dogecoin#22: Clamp JSON object depth to PHP limit
54c4015 Clamp JSON object depth to PHP limit
5a58a46 Merge dogecoin#21: Remove hand-coded UniValue destructor.
b4cdfc4 Remove hand-coded UniValue destructor.
1ae6a23 Merge pull request dogecoin#57 from MarcoFalke/test_fix
92bdd11 univalue_write: remove unneeded sstream.h include
ffb621c Merge pull request dogecoin#56 from drodil/remove_sstream_header
f33acf9 Merge commit '7890db9~' into HEAD
7fba60b Merge dogecoin#17: [docs] Update readme
4577454 Merge #13: Fix typo
66e0ade Remove unnecessary sstream header from univalue.h
ac7e73c [docs] Update readme
7890db9 Merge #11: Remove deprecated std pair wrappers
88967f6 Version 1.0.4
40e3485 Merge #14: Cleaned up namespace imports to reduce symbol collisions
1dc113d Merge pull request dogecoin#50 from luke-jr/pushKV_bool
72392fb [tests] test pushKV for boolean values
c23132b Pushing boolean value to univalue correctly
4a49647 Fix typo
85052a4 Remove deprecated std::pair wrappers
81faab2 Merge pull request dogecoin#48 from fwolfst/47-UPDATE_MIT_LINK_TO_HTTPS
b17634e Update URLs to MIT license.
51d3ab3 Merge #10: Add pushKV(key, boolean) function (replaces #5)
129bad9 [tests] test pushKV for boolean values
b3c44c9 Pushing boolean value to univalue correctly
07947ff Merge #9: [tests] Fix BOOST_CHECK_THROW macro
ec849d9 [tests] Fix BOOST_CHECK_THROW macro
88ab64f Merge pull request dogecoin#46 from jasonbcox/master
35ed96d Merge pull request dogecoin#44 from MarcoFalke/Mf1709-univalue-cherrypick-explicit
420c226 Merge pull request dogecoin#45 from MarcoFalke/Mf1710-univalue-revert-test
d208f98 Cleaned up namespace imports to reduce symbol collisions
31bc9f5 Merge #8: Remove unused Homebrew workaround
fa04209 Remove HomeBrew workaround
a523e08 Merge #7: Declare single-argument (non-converting) constructors "explicit"
a9e53b3 Merge #4: Pull upstream
fe805ea Declare single-argument (non-converting) constructors "explicit"
8a2d6f1 Merge pull request dogecoin#41 from jgarzik/get-obj-map
ba341a2 Add getObjMap() helper method.  Also, constify checkObject().
ceb1194 Handle .pushKV() and .checkObject() edge cases.
107db98 Add ::push_back(double) method for feature parity.
d415300 Move one-line implementation of UniValue::read() to header.
52e85b3 Move exception-throwing get_* methods into separate implementation module.
dac5296 README.md: update code quotes
3e31dcf README.md: close code quote
d09b842 Update README.md
f1b86ed Convert README to markdown style.
1dfe464 Import UniValue class unit tests from bitcoin project.
0d3e74d operator[] takes size_t index parameter (versus unsigned int)
640158f Private findKey() method becomes size_t clean, and returns bool on failure.
7099135 Merge pull request dogecoin#36 from ryanofsky/pr/end-str
a31231b Version 1.0.3
4fd5444 Reject unterminated strings
81eba33 Merge pull request dogecoin#26 from isle2983/pushBackHelpers
3640541 Merge PR dogecoin#32 from branch 'nul-not-special' of git://github.com/ryanofsky/univalue into merge
89bb073 Merge pull request dogecoin#31 from ryanofsky/raw-literals
511008c Merge pull request dogecoin#30 from ryanofsky/test-driver
77974f3 Merge pull request dogecoin#34 from paveljanik/20161116_Wshadow_codepoint
a38fcd3 Do not shadow member variable codepoint.
fd32d1a Don't require nul-terminated string inputs
0bb1439 Support parsing raw literals in UniValue
28876d0 Merge pull request dogecoin#29 from btcdrak/exportspace
839ccd7 Add test driver for JSONTestSuite
26ef3ff Remove trailing whitespace from JSON export
cfa0384 Convenience wrappers for push_back-ing integer types

git-subtree-dir: src/univalue
git-subtree-split: a44caf65fe55b9dd8ddb08f04c0f70409efd53b3

fa56d56 fuzz: Properly initialize PrecomputedTransactionData (MarcoFalke)

Pull request description:

  Fixes:

  ```
  script_flags: script/interpreter.cpp:1512: bool SignatureHashSchnorr(uint256 &, const ScriptExecutionData &, const T &, uint32_t, uint8_t, SigVersion, const PrecomputedTransactionData &) [T = CTransaction]: Assertion `cache.m_bip341_taproot_ready && cache.m_spent_outputs_ready' failed.
  ==34989== ERROR: libFuzzer: deadly signal
      #0 0x55e90077ff11 in __sanitizer_print_stack_trace (/tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags+0x20cf11)
      dogecoin#1 0x55e9006cb068 in fuzzer::PrintStackTrace() (/tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags+0x158068)
      dogecoin#2 0x55e9006b01b3 in fuzzer::Fuzzer::CrashCallback() (/tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags+0x13d1b3)
      dogecoin#3 0x7f6fb89383bf  (/lib/x86_64-linux-gnu/libpthread.so.0+0x153bf)
      dogecoin#4 0x7f6fb855018a in raise (/lib/x86_64-linux-gnu/libc.so.6+0x4618a)
      dogecoin#5 0x7f6fb852f858 in abort (/lib/x86_64-linux-gnu/libc.so.6+0x25858)
      dogecoin#6 0x7f6fb852f728  (/lib/x86_64-linux-gnu/libc.so.6+0x25728)
      dogecoin#7 0x7f6fb8540f35 in __assert_fail (/lib/x86_64-linux-gnu/libc.so.6+0x36f35)
      dogecoin#8 0x55e9008275bd in bool SignatureHashSchnorr<CTransaction>(uint256&, ScriptExecutionData const&, CTransaction const&, unsigned int, unsigned char, SigVersion, PrecomputedTransactionData const&) /tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/script/interpreter.cpp:1512:5
      dogecoin#9 0x55e900825a3f in GenericTransactionSignatureChecker<CTransaction>::CheckSchnorrSignature(Span<unsigned char const>, Span<unsigned char const>, SigVersion, ScriptExecutionData const&, ScriptError_t*) const /tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/script/interpreter.cpp:1699:10
      dogecoin#10 0x55e900832503 in VerifyWitnessProgram(CScriptWitness const&, int, std::vector<unsigned char, std::allocator<unsigned char> > const&, unsigned int, BaseSignatureChecker const&, ScriptError_t*, bool) /tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/script/interpreter.cpp:1900:26
      dogecoin#11 0x55e90082ecb5 in VerifyScript(CScript const&, CScript const&, CScriptWitness const*, unsigned int, BaseSignatureChecker const&, ScriptError_t*) /tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/script/interpreter.cpp:1977:18
      dogecoin#12 0x55e9007a9b61 in test_one_input(std::vector<unsigned char, std::allocator<unsigned char> > const&) /tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags.cpp:51:30
      dogecoin#13 0x55e9007d0b49 in LLVMFuzzerTestOneInput /tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/fuzz.cpp:36:5
      dogecoin#14 0x55e9006b1871 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags+0x13e871)
      dogecoin#15 0x55e9006b0fb5 in fuzzer::Fuzzer::RunOne(unsigned char const*, unsigned long, bool, fuzzer::InputInfo*, bool*) (/tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags+0x13dfb5)
      dogecoin#16 0x55e9006b38d7 in fuzzer::Fuzzer::ReadAndExecuteSeedCorpora(std::__Fuzzer::vector<fuzzer::SizedFile, fuzzer::fuzzer_allocator<fuzzer::SizedFile> >&) (/tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags+0x1408d7)
      dogecoin#17 0x55e9006b3c39 in fuzzer::Fuzzer::Loop(std::__Fuzzer::vector<fuzzer::SizedFile, fuzzer::fuzzer_allocator<fuzzer::SizedFile> >&) (/tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags+0x140c39)
      dogecoin#18 0x55e9006a290e in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags+0x12f90e)
      dogecoin#19 0x55e9006cb752 in main (/tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags+0x158752)
      dogecoin#20 0x7f6fb85310b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
      dogecoin#21 0x55e9006776ad in _start (/tmp/bitcoin-core/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/script_flags+0x1046ad)

ACKs for top commit:
  laanwj:
    Code review ACK fa56d56

Tree-SHA512: 5637b0a0d982360df32d8cd39e913395967af02ec746508fc5f2fd649695c58bfaaf18ef76f4ca9da764d34fdd63dfe188317dd41b2ed57534bd4055a05ae870