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[SR-8855] Runtime crash when Mirror attempts to access type metadata #51361

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swift-ci opened this issue Sep 26, 2018 · 3 comments
Open

[SR-8855] Runtime crash when Mirror attempts to access type metadata #51361

swift-ci opened this issue Sep 26, 2018 · 3 comments
Labels
access control Feature → modifiers: Access control and access levels bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. regression runtime The Swift Runtime standard library Area: Standard library umbrella swift 4.2

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@swift-ci
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Previous ID SR-8855
Radar rdar://problem/44797569
Original Reporter xardas (JIRA User)
Type Bug

Attachment: Download

Environment

Xcode 10.0 (10A255), macOS 10.13.6, Swift 4.2

Additional Detail from JIRA
Votes 0
Component/s Standard Library
Labels Bug, 4.2Regression, Runtime
Assignee None
Priority Medium

md5: 691b9dcf74ebd3cd90c21b42c5c53192

Issue Description:

There is EXC_BAD_ACCESS crash during attempt to access Mirror's child when mirror reflects generic with type constraints resolved to another generic type.

Crash is always reproducible on Xcode 10 but non-reproducible on Xcode 9.

Stacktrace and sample project is attached.
@belkadan
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@swift-ci create

@swift-ci
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Comment by Roman Ermolov (JIRA)

@belkadan it seems that the bug is fixed (checked it on Xcode 10.1 10B61).

@belkadan
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Thanks! @mikeash, @slavapestov, do you know what would have fixed it?

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added regression swift 4.2 access control Feature → modifiers: Access control and access levels and removed 4.2 regression labels Nov 19, 2022
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access control Feature → modifiers: Access control and access levels bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. regression runtime The Swift Runtime standard library Area: Standard library umbrella swift 4.2
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@belkadan @swift-ci @AnthonyLatsis