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subtype conversion in MetatypeConversionExpr is invalid

#86680

· jamieQ opened

on Jan 21, 2026

Crash on compile of code that tries to assign borrowing closure to non-borrowing

#86676

· hollyschilling-cio opened

on Jan 20, 2026

Bug: ~Copyable constraint propagation fails during module emission with Sequence conformance

#86669

· coenttb opened

on Jan 20, 2026

Suboptimal codegen: nested generic type subscript ~1.6x slower than flat struct

#86666

· coenttb opened

on Jan 20, 2026

Build time regression started around October 2025

#86663

· hjyamauchi opened

on Jan 20, 2026

Inconsistent behavior with placeholder types in closures

#86659

· slavapestov opened

on Jan 20, 2026

InlineArray<capacity, ...> with value generic parameter skips deinit for cross-module ~Copyable elements

#86652

· coenttb opened

on Jan 20, 2026

Cast to [String : any Sendable] from [String : Any] is impossible without a warning or an error

#86650

· charlieMonroe opened

on Jan 20, 2026

Parameter pack expansion in tuple crashes

#86648

· gnachman opened

on Jan 20, 2026

Global/static <code>let x: SomeType = x</code> is accepted by the compiler and zero-initialized

accepts invalid

#86645

· kaascevich opened

on Jan 19, 2026

didSet called when initializing optional property with property wrapper

#86642

· nickasd opened

on Jan 19, 2026

The @section attribute (SE-0492) requires constant expressions for initialization, but rejects struct initialization even with literal values

#86636

· nicolas-christe opened

on Jan 19, 2026