[SR-8855] Runtime crash when Mirror attempts to access type metadata #51361
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
Attachment: Download
Environment
Xcode 10.0 (10A255), macOS 10.13.6, Swift 4.2
Additional Detail from JIRA
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.
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