segmentation fault while running swiftlint in Xcode build phase

[OliverDobner-flinc]

Randomly but many times a day we got this segmentation fault while running swiftlint. We use the Xcode build phase example from swiftlint website. Retrying the build always succeeds. This happens on the local machine as well as on our ci server.

I don#t know how to gather further information.

PhaseScriptExecution Run\ Swiftlint /Users/XXX/Library/Developer/Xcode/DerivedData/YYYY-aolnrbfklebwpkalxqydfbqcfhkn/Build/Intermediates/YYYY.build/Release-iphoneos/YYYY.build/Script-E2C189DC1E64AA330067ABBD.sh
cd /Users/XXX/Projects/YYYY
/bin/sh -c /Users/XXX/Library/Developer/Xcode/DerivedData/YYYY-aolnrbfklebwpkalxqydfbqcfhkn/Build/Intermediates/YYYY.build/Release-iphoneos/YYYY.build/Script-E2C189DC1E64AA330067ABBD.sh

Loading configuration from '.swiftlint.yml'
Linting Swift files in current working directory
Linting 'AppDelegate.swift' (1/25)
Linting 'ApplicationController.swift' (2/25)
Linting 'CurvedArrowOverlay.swift' (3/25)
Linting 'CurvedArrowOverlayRenderer.swift' (4/25)
Linting 'DebugMapViewController.swift' (5/25)
Linting 'DebugUUIDViewController.swift' (6/25)
Linting 'PromiseKit+Race.swift' (7/25)
Linting 'LocationService.swift' (8/25)
/Users/XXX/Library/Developer/Xcode/DerivedData/YYYY-aolnrbfklebwpkalxqydfbqcfhkn/Build/Intermediates/YYYY.build/Release-iphoneos/YYYY.build/Script-E2C189DC1E64AA330067ABBD.sh: line 6: 1560 Segmentation fault: 11 swiftlint lint --no-cache
Command /bin/sh failed with exit code 139

[alanzeino]

I updated from 0.12.0 to 0.16.1 to test out the parallelization improvements in #1077 and it crashed pretty much instantly (file names obfuscated):

Linting 'A.swift' (1/6816)
Linting 'B.swift' (2/6816)
Linting 'C.swift' (3/6816)
Linting 'main.swift' (4/6816)
Linting 'D.swift' (5/6816)
Linting 'E.swift' (6/6816)
Linting 'F.swift' (7/6816)
Linting 'G.swift' (8/6816)
objc[23486]: NSRegularExpression object 0x7f9c4e51f640 overreleased while already deallocating; break on objc_overrelease_during_dealloc_error to debug
Linting 'H.swift' (9/6816)
Linting 'I.swift' (10/6816)
Linting 'J.swift' (11/6816)
Linting 'K.swift' (12/6816)
Linting 'L.swift' (13/6816)
Segmentation fault: 11

[alanzeino]

Interestingly, I think this is resolved on master. I cloned and ran via Xcode, it worked just fine on the first pass. I'll try a few more times just to be sure.

[marcelofabri]

master has #1347, which solved a threading problem.

[YuriiTrach]

I've faced with this issue on 0.16.1. Removing derived data helped me

[marcelofabri]

I'm closing this since we fixed a threading issue on 0.17.0. Feel free to reopen if this happens again.