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x86_64 backend fails to reuse temporary stack values resulting in greater stack usage and potential overflow

arch-x86_6464-bit x8664-bit x86

backend-self-hosted

enhancementSolving this issue will likely involve adding new logic or components to the codebase.Solving this issue will likely involve adding new logic or components to the codebase.

optimization

Status: Open.

#24183 In ziglang/zig;

· myclevorname opened on Jun 14, 2025

Multiple compiler errors in std

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

contributor friendlyThis issue is limited in scope and/or knowledge of Zig internals.This issue is limited in scope and/or knowledge of Zig internals.

standard libraryThis issue involves writing Zig code for the standard library.This issue involves writing Zig code for the standard library.

Status: Open.

#20505 In ziglang/zig;

· PauloCampana opened on Jul 5, 2024

do you want ANSI color code support for <code>std.fmt.format</code>?

enhancementSolving this issue will likely involve adding new logic or components to the codebase.Solving this issue will likely involve adding new logic or components to the codebase.

standard libraryThis issue involves writing Zig code for the standard library.This issue involves writing Zig code for the standard library.

Status: Open.

#9502 In ziglang/zig;

· Jarred-Sumner opened on Aug 1, 2021

Switch expression returns incorrect value.

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

stage1The process of building from source via WebAssembly and the C backend.The process of building from source via WebAssembly and the C backend.

Status: Open.

#8640 In ziglang/zig;

· neuring opened on Apr 29, 2021

Coercing self pointer in frame struct member causes 'depends on itself'

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

Status: Open.

#8648 In ziglang/zig;

· Hadron67 opened on Apr 30, 2021

Confusing error message when not handling else case for error union type

enhancementSolving this issue will likely involve adding new logic or components to the codebase.Solving this issue will likely involve adding new logic or components to the codebase.

error messageThis issue points out an error message that is unhelpful and should be improved.This issue points out an error message that is unhelpful and should be improved.

frontendTokenization, parsing, AstGen, Sema, and Liveness.Tokenization, parsing, AstGen, Sema, and Liveness.

Status: Open.

#8679 In ziglang/zig;

· Ivan-Velickovic opened on May 4, 2021

errdefer |err| uses the local errorset instead of the wrapping errorset

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

Status: Open.

#8697 In ziglang/zig;

· fengb opened on May 6, 2021

std.log namespace scopes by package

proposalThis issue suggests modifications. If it also has the "accepted" label then it is planned.This issue suggests modifications. If it also has the "accepted" label then it is planned.

standard libraryThis issue involves writing Zig code for the standard library.This issue involves writing Zig code for the standard library.

Status: Open.

#8812 In ziglang/zig;

· marler8997 opened on May 18, 2021

New format string for std.fmt.format

breakingImplementing this issue could cause existing code to no longer compile or have different behavior.Implementing this issue could cause existing code to no longer compile or have different behavior.

proposalThis issue suggests modifications. If it also has the "accepted" label then it is planned.This issue suggests modifications. If it also has the "accepted" label then it is planned.

standard libraryThis issue involves writing Zig code for the standard library.This issue involves writing Zig code for the standard library.

Status: Open.

#8291 In ziglang/zig;

· JoaoSilveira opened on Mar 19, 2021

SIGBUS in codegen while generating comptime value

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

stage1The process of building from source via WebAssembly and the C backend.The process of building from source via WebAssembly and the C backend.

Status: Open.

#8320 In ziglang/zig;

· mattnite opened on Mar 21, 2021

Setting optionals to undefined defaults to null in debug mode

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

stage1The process of building from source via WebAssembly and the C backend.The process of building from source via WebAssembly and the C backend.

Status: Open.

#8333 In ziglang/zig;

· fengb opened on Mar 22, 2021

Infinite RAM usage while compiling certain switch statement

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

Status: Open.

#8352 In ziglang/zig;

· sareneFactorial opened on Mar 24, 2021

Use <code>MAP_ALIGNED</code> flag to mmap on NetBSD

os-netbsd

standard libraryThis issue involves writing Zig code for the standard library.This issue involves writing Zig code for the standard library.

Status: Open.

#8385 In ziglang/zig;

· daurnimator opened on Mar 29, 2021

Suboptimal assembly for struct equality

optimization

Status: Open.

#8391 In ziglang/zig;

· rafihayne opened on Mar 29, 2021

test coverage for all compile errors

enhancementSolving this issue will likely involve adding new logic or components to the codebase.Solving this issue will likely involve adding new logic or components to the codebase.

frontendTokenization, parsing, AstGen, Sema, and Liveness.Tokenization, parsing, AstGen, Sema, and Liveness.

Status: Open.

#8402 In ziglang/zig;

· andrewrk opened on Apr 1, 2021

test coverage for source locations &amp; inlined function calls from different files

enhancementSolving this issue will likely involve adding new logic or components to the codebase.Solving this issue will likely involve adding new logic or components to the codebase.

frontendTokenization, parsing, AstGen, Sema, and Liveness.Tokenization, parsing, AstGen, Sema, and Liveness.

Status: Open.

#8403 In ziglang/zig;

· andrewrk opened on Apr 1, 2021

integer value cannot be coerced to type 'c_long' in os.nanosleep()

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

os-windows

standard libraryThis issue involves writing Zig code for the standard library.This issue involves writing Zig code for the standard library.

Status: Open.

#8488 In ziglang/zig;

· s-ol opened on Apr 10, 2021

@Type() cannot build tagged unions

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

stage1The process of building from source via WebAssembly and the C backend.The process of building from source via WebAssembly and the C backend.

Status: Open.

#8114 In ziglang/zig;

· fengb opened on Mar 1, 2021

when testing a file struct, it references an instance of the struct which is not needed.

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

stage1The process of building from source via WebAssembly and the C backend.The process of building from source via WebAssembly and the C backend.

Status: Open.

#8146 In ziglang/zig;

· g-w1 opened on Mar 4, 2021

broken llvm module when inlining an <code>await</code> expression

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

Status: Open.

#7902 In ziglang/zig;

· emekoi opened on Jan 28, 2021

Higher half: Debug info relocations failing at link time

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

stage1The process of building from source via WebAssembly and the C backend.The process of building from source via WebAssembly and the C backend.

Status: Open.

#7962 In ziglang/zig;

· N00byEdge opened on Feb 5, 2021

Compiler error when using async and WASM

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

Status: Open.

#7995 In ziglang/zig;

· leroycep opened on Feb 11, 2021

Add safety check for await inside nosuspend blocks

enhancementSolving this issue will likely involve adding new logic or components to the codebase.Solving this issue will likely involve adding new logic or components to the codebase.

Status: Open.

#8001 In ziglang/zig;

· mguaypaq opened on Feb 12, 2021

Structs containing a pointer to array of @This() fails (struct depends on itself)

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

Status: Open.

#8050 In ziglang/zig;

· tnorth opened on Feb 22, 2021

Allowed to use <code>undefined</code> in comparison

bugObserved behavior contradicts documented or intended behaviorObserved behavior contradicts documented or intended behavior

stage1The process of building from source via WebAssembly and the C backend.The process of building from source via WebAssembly and the C backend.

Status: Open.

#8056 In ziglang/zig;

· ratfactor opened on Feb 23, 2021