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Codegen debug specs are failing with LLVM 23

kind:bugA bug in the code. Does not apply to documentation, specs, etc.A bug in the code. Does not apply to documentation, specs, etc.

topic:stdlib:llvm

Status: Open.

Bug

#16972 In crystal-lang/crystal;

· straight-shoota opened on May 17, 2026

Documentation incorrectly suggests create returns a string

kind:bugA bug in the code. Does not apply to documentation, specs, etc.A bug in the code. Does not apply to documentation, specs, etc.

Status: Open.

Bug

#16948 In crystal-lang/crystal;

· zendrx opened on May 14, 2026

Runtime Segfault during In-Bound Array Access in Non-Release Mode

kind:bugA bug in the code. Does not apply to documentation, specs, etc.A bug in the code. Does not apply to documentation, specs, etc.

Status: Open.

Bug

#16947 In crystal-lang/crystal;

· dhwa-kyle opened on May 13, 2026

The parser should allow omitting spaces between self and /.

kind:bugA bug in the code. Does not apply to documentation, specs, etc.A bug in the code. Does not apply to documentation, specs, etc.

topic:compiler:parser

Status: Open.

Bug

#16940 In crystal-lang/crystal;

· expeehaa opened on May 12, 2026

HTTP::Request.form_params? does not handle options in Content-Type header

kind:bugA bug in the code. Does not apply to documentation, specs, etc.A bug in the code. Does not apply to documentation, specs, etc.

topic:stdlib:networking

Status: Open.

Bug

#16932 In crystal-lang/crystal;

· swsch opened on May 11, 2026

TIES_AWAY should be the default for Number#RoundingMode

kind:feature

Status: Open.

Feature

#16931 In crystal-lang/crystal;

· HCLarsen opened on May 9, 2026

HTTP::Client#exec fails on closed socket with "can't rewind" if request.body is not rewindable

kind:bugA bug in the code. Does not apply to documentation, specs, etc.A bug in the code. Does not apply to documentation, specs, etc.

topic:stdlib:networking

Status: Open.

Bug

#16920 In crystal-lang/crystal;

· jgaskins opened on May 5, 2026

lib declarations are dependent on code order

kind:bugA bug in the code. Does not apply to documentation, specs, etc.A bug in the code. Does not apply to documentation, specs, etc.

topic:compiler:parser

Status: Open.

Bug

#16918 In crystal-lang/crystal;

· LoadingBG opened on May 4, 2026

Macro #resolve on another def's parameter restriction picks up freevars from the wrong scope

kind:bugA bug in the code. Does not apply to documentation, specs, etc.A bug in the code. Does not apply to documentation, specs, etc.

topic:lang:macros

Status: Open.

Bug

#16913 In crystal-lang/crystal;

· Blacksmoke16 opened on May 2, 2026

Block type constraint in Sync::Mutex#synchronize confuses the compiler

kind:regressionSomething that used to correctly work but no longer worksSomething that used to correctly work but no longer works

topic:stdlib:runtime

Status: Open.

Bug

#16903 In crystal-lang/crystal;

· ysbaddaden opened on Apr 30, 2026

-Os and -Oz will be removed in LLVM 23

topic:compiler:codegen

topic:stdlib:llvm

Status: Open.

#16895 In crystal-lang/crystal;

· HertzDevil opened on Apr 27, 2026

minor: warning: relating to object file built for newer macOs version than being linked

platform:darwin

status:discussion

Status: Open.

Bug

#16887 In crystal-lang/crystal;

· michael-byo opened on Apr 26, 2026