[SR-3563] EXC_BAD_ACCESS related to returning nested tuples from closures #46151
Labels
bug
A deviation from expected or documented behavior. Also: expected but undesirable behavior.
compiler
The Swift compiler in itself
crash
Bug: A crash, i.e., an abnormal termination of software
regression
run-time crash
Bug → crash: Swift code crashed during execution
swift 3.0
Comments
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@slavapestov, this looks kind of like the tuple things you've been investigating. Notice that the returned tuple is immediately passed through to the argument to map. (The diff is Xcode-style, with the new code on the left.) |
AnthonyLatsis
added
the
crash
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Attachment: Download
Environment
Xcode 8.2, macOS Sierra
Additional Detail from JIRA
md5: 6d23a2ff463bf13de8dd3be5247673cf
Issue Description:
After upgrading from Swift 2.3 to Swift 3, I've encountered a new runtime crash having to do with returning nested typealiased tuples. I've not yet been able to reduce the issue to a simple example, but I thought I should file it nonetheless. I hope you can point me in the right direction as to how to make a minimal example.
To work around the issue, I had to replace a tuple with a struct. You can see the diff in the attached screenshot. The crash happens on the original (right) line 37.
Other info:
`HSCartDataController.TokenContext` is a typealias of a tuple itself
happens in debug and release builds
I apologise if a bug report like this, with code that has so much going on, is not useful. Let me know how I can help!
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