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Leaking reach capabilities for class parameters #23303

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Linyxus opened this issue Jun 2, 2025 · 0 comments · Fixed by #23342
Closed

Leaking reach capabilities for class parameters #23303

Linyxus opened this issue Jun 2, 2025 · 0 comments · Fixed by #23342
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@odersky
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area:experimental:cc Capture checking related itype:bug

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@Linyxus
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Linyxus commented Jun 2, 2025

Compiler version

main

Minimized code

import language.experimental.captureChecking
class Runner(ops: List[() => Unit]):
  def execute: Unit = ops.foreach(f => f())

Output

It compiles.

Expectation

It should not.
@Linyxus Linyxus added itype:bug area:experimental:cc Capture checking related labels Jun 2, 2025
@odersky odersky mentioned this issue Jun 10, 2025
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joroKr21 pushed a commit to joroKr21/dotty that referenced this issue Jun 11, 2025
@odersky
Fix handling of @use and @consume in class parameters (scala#23342)
eb1a0af 
Multiple fixes, both to keep the annotations in place for capture
checking, and to consult them
when we do leak checking.

Fixes scala#23303
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@odersky odersky

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area:experimental:cc Capture checking related itype:bug
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Fix handling of @use and @consume in class parameters dotty-staging/dotty
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@odersky @Linyxus