[SR-11548] Segmentation fault

[swift-ci]

Previous ID	SR-11548
Radar	rdar://57226682
Original Reporter	mihaicris (JIRA User)
Type	Bug

Attachment: Download

Environment

macOS Version 10.14.6 (18G95)
Xcode Version 11.0 (11A420a)
Target iOS Version 11.0
Compiling for device: Simulator iPAd Pro (11-inch), iOS 13.0 (17A577a)

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug, 5.1Regression, CompilerCrash
Assignee	mihaicris (JIRA)
Priority	Medium

md5: 5294c4ca04a35c0a87d856534400d991

Issue Description:

I get this segmentation fault (in attachment) when trying to compile the project with the latest Xcode/Swift version. Project is compiling fine with Xcode 10.1 (10B61).
I would like to provide more information but not sure where to start.

[belkadan]

Is this a project you can share? If not here, than maybe just with Apple at https://feedbackassistant.apple.com ?

[swift-ci]

Comment by Mihai Cristescu (JIRA)

Unfortunately I can not share the project.

I will see what are the options, maybe the company could use one of the Technical Support Incident (TSI) included in the Apple Developer Enterprise Program.

[swift-ci]

Comment by Mihai Cristescu (JIRA)

Filed a bug at Feedback Assistant:

No. FB7448788

[aschwaighofer]

Does this reproduce with a recent swift.org snapshot toolchain? https://swift.org/download/#snapshots

[swift-ci]

Comment by Mihai Cristescu (JIRA)

Yes, I tried it today, the defect is still there. 🙁

The main project doesn't compile, but I was able to comment some code and compile the rest of the project. So I identified some files which are creating the issues.

Now, I am still trying to create a sample project with a subset of files that can be shared with you.

Unfortunately, until now I could not reproduce this defect with only a few files (which are involved), the smaller project compiles fine and the defect doesn't manifest.

I am still working on providing you a sample project.

Please let me know if the team fixes any defect in this area (Keypaths) such that I can try again with a new snapshot.

Thank you.

[swift-ci]

Comment by Mihai Cristescu (JIRA)

Hi, I am trying to compile the project with a newer snapshot.

I am getting this error:

ld: file not found: /Library/Developer/Toolchains/swift-DEVELOPMENT-SNAPSHOT-2020-01-05-a.xctoolchain/usr/lib/clang/7.0.0/lib/darwin/libclang_rt.profile_iossim.a

Version 11.3 (11C29)
Toolchain: Swift Development Snapshot 2020-01-05 (a)

[aschwaighofer]

It seems the snapshots are not including these runtime libraries for platforms other than Mac OS.

A workaround (copy the version from the Xcode sdk) is described here:
https://forums.swift.org/t/undefined-symbol-isosversionatleast/29782/17

You could also try disabling profiling. I think this library dependency is due to enabling profiling.