Files
swift-mirror/validation-test/IDE/crashers_fixed
Slava Pestov f05d1cab32 Sema: Fix crash when declaring an old-style variadic parameter with nonescaping type
This is not supported for the same reason you can't have a noncopyable
variadic parameter, but the code was hard-coded to check for copyability
only.

Generalize this to apply the generic signature for Array via the
common code path, and add a custom note to explain why those requirements
are checked in the first place.

Cleaning this up also fixed some fuzzer crashes.

Reported on the forums:
https://forums.swift.org/t/variadic-escapable-arguments-crash-the-compiler/86727/2
2026-05-18 10:49:23 -04:00
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