[6.2] LifetimeDependenceDiagnostics: diagnose indirect closure results. #81993
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Add support for diagnosing calls to closures that return a generic
non-Escapable result.
Closures do not yet model lifetime dependencies. The diagnostics have
a special case for handling nonescaple result with no lifetime
dependence, but it previously only handled direct results. This fix handles
cases like the following:
func callIndirectClosure<T>(f: () -> NE<T>) -> NE<T> {
f()
}
Fixes rdar://134318846 ([nonescapable] diagnose function types with nonescapable results)
(cherry picked from commit 1d09c06)
Diagnostics on an indirect result ($return_value) did not report a source location. (cherry picked from commit c030b78)
(cherry picked from commit b1044c6)
Contributor
Author
|
@meg-gupta can you review this for 6.2? |
Contributor
Author
|
@swift-ci test |
tbkka
approved these changes
Jun 5, 2025
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main PR: #81992
LifetimeDependenceDiagnostics: diagnose indirect closure results.
Add support for diagnosing calls to closures that return a generic
non-Escapable result.
Closures do not yet model lifetime dependencies. The diagnostics have
a special case for handling nonescaple result with no lifetime
dependence, but it previously only handled direct results. This fix handles
cases like the following:
Fixes rdar://134318846 ([nonescapable] diagnose function types with nonescapable results)
(cherry picked from commit 1d09c06)
LifetimeDependenceDiagnostics: fix source loc for implicit variables
Diagnostics on an indirect result ($return_value) did not report a source
location.
(cherry picked from commit c030b78)
Add unit tests for indirect lifetime dependence.
(cherry picked from commit b1044c6)
--- CCC ---
Explanation: Add support for diagnosing calls to closures that return a generic
non-Escapable result.
Scope: Limited to -enable-experimental-feature LifetimeDependence
Radar/SR Issue: rdar://134318846 ([nonescapable] diagnose function types with nonescapable results)
main PR: #81992
Risk: Low
Testing: Added unit tests
Reviewer: Meghana Gupta