[swift-users] [swift-corelibs-dev] DateFormatter crash on second usage (new instance) on Linux (swift 3.0.1)

[Philippe Hausler]

We should run those tests with ASAN, I thought I had fixed that with the Sierra merge.

Sent from my iPhone

> On Jan 25, 2017, at 6:11 PM, Will Stanton via swift-corelibs-dev <swift-corelibs-dev at swift.org> wrote:
> 
> Based on the backtrace, I think the code is running into a memory issue with Swift Foundation:
> https://bugs.swift.org/browse/SR-2485
> https://bugs.swift.org/browse/SR-2462
> 
> I haven’t seen this in a while - are you able to try running on Swift 3.1 or 3.0.2?
> Your code seems to work on the IBM Sandbox with 3.0.2 but not 3.0.1.
> You could also try replacing every 'let’ with ‘var’ but that might not be the right solution :-)
> 
> Regards,
> Will Stanton
> 
>> On Jan 25, 2017, at 5:04 PM, Dennis Schafroth via swift-users <swift-users at swift.org> wrote:
>> 
>> Hi
>> 
>> Trying to do some simple date parsing from syslog format (“Jan 25 20:21:22”) into Date. Seem to work once but crashes on second call
>> 
>> 
>> func dateConv(_ dateString: String) -> Date? {
>>  let dateFormatter = DateFormatter()
>>  dateFormatter.dateFormat = "MMM dd HH:mm"
>>  dateFormatter.locale = Locale(identifier: "da_DK_POSIX")
>>  if let date = dateFormatter.date(from: dateString) {
>>    print("Real date: \(date)" )
>>    return date
>>  }
>>  return nil
>> }
>> 
>> var date  = dateConv("Jan 25 20:10")
>> var date2 = dateConv("Jan 25 20:11”)
>> 
>> # swift main.swift
>> Real date: 2000-01-25 19:10:00 +0000
>> 0  swift            0x000000000334ab78 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 40
>> 1  swift            0x0000000003349346 llvm::sys::RunSignalHandlers() + 54
>> 2  swift            0x000000000334b6aa
>> 3  libpthread.so.0  0x00007fec92166890
>> 4  libswiftCore.so  0x00007fec8e8f0735
>> 5  libFoundation.so 0x00007fec8c0ab6ee
>> 6  libFoundation.so 0x00007fec8bd7a222
>> 7  libFoundation.so 0x00007fec8bd7c623
>> 8  libFoundation.so 0x00007fec8bf0e873 _TFC10Foundation6NSDateg11descriptionSS + 99
>> 9  libFoundation.so 0x00007fec8c182829 _TTWV10Foundation4Dates23CustomStringConvertibleS_FS1_g11descriptionSS + 57
>> 10 libswiftCore.so  0x00007fec8e78c745 _TFs15_print_unlockedu0_R_s16TextOutputStreamrFTxRq__T_ + 997
>> 
>> using swift 3.0.1. Am I doing something wrong? I seems to work on macOS.
>> 
>> cheers,
>> :-Dennis
> 
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