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[SR-7309] Compiler crash : Segfault compiling closure with guard let self = self #49857

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swift-ci opened this issue Mar 29, 2018 · 3 comments
Closed

[SR-7309] Compiler crash : Segfault compiling closure with guard let self = self #49857

swift-ci opened this issue Mar 29, 2018 · 3 comments
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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 type checker Area → compiler: Semantic analysis

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@swift-ci
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Previous ID SR-7309
Radar rdar://problem/39040593
Original Reporter damonallison (JIRA User)
Type Bug
Status Resolved
Resolution Done

Attachment: Download

Environment

Xcode Version 9.3 beta 4 (9Q127n)

/Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift -v
Apple Swift version 4.1 (swiftlang-902.0.43 clang-902.0.37.1)
Target: x86_64-apple-darwin17.4.0

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, CompilerCrash, TypeChecker
Assignee damonallison (JIRA)
Priority Medium

md5: 3e1bae25fc2a85cb338683a4c729cc79

Issue Description:

I ran into this randomly experimenting with closure capture lists while reading The Swift Programming Language.

Run Cmd-U from Xcode with the attached project to reproduce.

1.  While type-checking getter for asHTMLWeak at /Users/allidam/projects/swift-fundamentals/SwiftFundamentals-Tests/Language/MemoryManagementTests.swift:183:22

2.  While type-checking declaration 0x7f939f6e82b0 in module 'SwiftFundamentals_Tests'

3.  While type-checking expression at [/Users/allidam/projects/swift-fundamentals/SwiftFundamentals-Tests/Language/MemoryManagementTests.swift:183:49 - line:193:13] RangeText="{ [weak self] in

                guard let self = self else {

                    return "Unknown"

                }

                if let text = self.text {

                    return "<\(self.name)>\(text)</\(self.name)>"

                }

                else {

                    return "<\(self.name) />"

                }

            }"

4.  While type-checking pattern at [/Users/allidam/projects/swift-fundamentals/SwiftFundamentals-Tests/Language/MemoryManagementTests.swift:184:27 - line:184:27] RangeText="s"

5.  While type-checking expression at [/Users/allidam/projects/swift-fundamentals/SwiftFundamentals-Tests/Language/MemoryManagementTests.swift:184:27 - line:184:27] RangeText="s"

error: Segmentation fault: 11
@belkadan
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@swift-ci create

@xedin
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xedin commented Apr 5, 2018

Thank you for the report, damonallison (JIRA User)![]( Looks like this crash has been fixed recently, please use snapshot of trunk to verify) I've created PR #15775 to add minimized test-case to your regression suite.

@swift-ci
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Comment by Damon Allison (JIRA)

Verified this has been resolved. Thank you much, @xedin!

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added the crash Bug: A crash, i.e., an abnormal termination of software label Dec 12, 2022
This issue was closed.
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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 type checker Area → compiler: Semantic analysis
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@xedin @belkadan @swift-ci @AnthonyLatsis