I see a couple of places that are suspicious there: Description:
https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L66 <https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L66> And the nameString / valueString constants in the copy query items function: https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L1057 <https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L1057> https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L1079 <https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L1079> https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L1104 <https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L1104> https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L1134 <https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L1134> https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L1158 <https://github.com/apple/swift-corelibs-foundation/blob/master/CoreFoundation/URL.subproj/CFURLComponents.c#L1158> Do you have the ability to re-build swift-corelibs-foundation and run a test? I suspect if you replace those with CFRetain(CFSTR(…)) then it will fix your crash. - Tony > On Nov 29, 2017, at 2:06 PM, Brandon Williams <mbw...@gmail.com> wrote: > > Thanks for the info! > > FWIW, most of the places I have encountered this so far have made use of > `URLComponents`, and have even been able to eliminate the crash by getting > rid of that code in a few places. The other JIRA bug on this topic also > mentions URLComponents in their repro case. Seems to be the culprit. > > Also worth noting that in the above cases dealing with URLComponents the > crash only happens in DEBUG compilations, not RELEASE. > > However, I do have another one of these crashes that _does_ happen on RELEASE > builds that I haven’t yet been able to reduce. > > > On Wed, Nov 29, 2017 at 4:43 PM Tony Parker <anthony.par...@apple.com > <mailto:anthony.par...@apple.com>> wrote: > Hi Brandon, > > This is probably a bug in the CoreFoundation C sources part of > swift-corelibs-foundation. Unlike Darwin platforms, we can’t make the > CFSTR(“”) macro produce a CFStringRef that cannot be overreleased. Probably > there is a constant string returned from CF function, then the Swift runtime > assumes it can release it, and bam we wind up with an overrelease. > > We’ll have to track down which function is getting called, which probably > just requires stepping through that test case with a debugger… > > - Tony >> On Nov 29, 2017, at 1:34 PM, Brandon Williams via swift-corelibs-dev >> <swift-corelibs-dev@swift.org <mailto:swift-corelibs-dev@swift.org>> wrote: >> > >> Hello all! >> >> We’ve been encountering this runtime error quite a bit recently, and we have >> no idea why. We’ve filed a bug and there’s one other on JIRA related to >> this, but both without any comments: >> >> https://bugs.swift.org/browse/SR-6422 <https://bugs.swift.org/browse/SR-6422> >> https://bugs.swift.org/browse/SR-6398 <https://bugs.swift.org/browse/SR-6398> >> >> We’re curious if others are aware of this and or has more info? Is it a red >> herring for some other problem? >> >> Any info would be helpful! > >> _______________________________________________ >> swift-corelibs-dev mailing list >> swift-corelibs-dev@swift.org <mailto:swift-corelibs-dev@swift.org> >> https://lists.swift.org/mailman/listinfo/swift-corelibs-dev >> <https://lists.swift.org/mailman/listinfo/swift-corelibs-dev>
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