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Changelog for 1.21.0

topic:infrastructure

Status: Draft (not ready).

crystal-lang/crystalnumber 17095

#17095 In crystal-lang/crystal;

· straight-shoota opened on Jun 23, 2026

Include exit code in Process::Status#description

kind:feature

topic:stdlib:system

Status: Open (in progress).

crystal-lang/crystalnumber 17087

#17087 In crystal-lang/crystal;

· straight-shoota opened on Jun 20, 2026

Refactor Win32 iocp evloop

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:multithreading

topic:stdlib:runtime

Status: Open (in progress).

crystal-lang/crystalnumber 17101

#17101 In crystal-lang/crystal;

· ysbaddaden opened on Jun 26, 2026

Add OpenSSL::Cipher#gcm_tag and #gcm_tag= for AEAD ciphers

kind:feature

topic:stdlib:crypto

Status: Open (in progress).

crystal-lang/crystalnumber 17096

#17096 In crystal-lang/crystal;

· paulocoghi opened on Jun 23, 2026