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Error: no parameter named 'protection' for Mutex

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.

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

topic:stdlib:concurrency

Status: Open.

Bug

#16801 In crystal-lang/crystal;

· jwoertink opened on Apr 1, 2026

I`m confused on these three judge

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

#16798 In crystal-lang/crystal;

· nameearly opened on Mar 31, 2026

Data loss when writing long lines with File#print after File#set_encoding

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:files

Status: Open.

Bug

#16796 In crystal-lang/crystal;

· bloovis opened on Mar 30, 2026

Warnings in the formatter

kind:feature

status:discussion

topic:compiler:cli

topic:tools:formatter

Status: Open.

#16763 In crystal-lang/crystal;

· straight-shoota opened on Mar 19, 2026

Add String#present? method.

good first issueThis is an issue suited for newcomers to become aquianted with working on the codebase.This is an issue suited for newcomers to become aquianted with working on the codebase.

kind:feature

topic:stdlib:text

Status: Open.

Feature

#16757 In crystal-lang/crystal;

· zw963 opened on Mar 19, 2026

Formatter counts lines from lexer tokens

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:tools:formatter

Status: Open.

Bug

#16755 In crystal-lang/crystal;

· straight-shoota opened on Mar 19, 2026

Build fails on Windows: sh command not found during compilation (system cannot find the file specified)

platform:windowsWindows support based on the MSVC toolchain / Win32 APIWindows support based on the MSVC toolchain / Win32 API

status:discussion

Status: Open.

#16752 In crystal-lang/crystal;

· Yakumo-Yukari opened on Mar 18, 2026

shards binary not reachable on MacOS

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:infrastructure

Status: Open.

Bug

#16746 In crystal-lang/crystal;

· n-rodriguez opened on Mar 16, 2026

Parse parenthesis in type grammar into syntax tree

status:discussion

topic:tools:formatter

Status: Open.

#16743 In crystal-lang/crystal;

· straight-shoota opened on Mar 14, 2026

Uninitialized ivars are possible in JSON type hierarchy with explicit constructor in subclass

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:semantic

Status: Open.

Bug

#16729 In crystal-lang/crystal;

· jgaskins opened on Mar 12, 2026

Should the formatter remove duplicated parenthesis?

status:discussion

topic:tools:formatter

Status: Open.

#16728 In crystal-lang/crystal;

· straight-shoota opened on Mar 11, 2026

A type with :nodoc: can still be documented

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:tools:docs-generator

Status: Open.

Bug

#16718 In crystal-lang/crystal;

· ysbaddaden opened on Mar 10, 2026