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

[Dennis Schafroth]

Thanks for the suggestions. 

It works with 3.0.2 but won't compile with 3.1 beta for Ubuntu 14.04. Missing a Block.h which does exist in 3.0.2

:-Dennis

> On 26 Jan 2017, at 05.20, Philippe Hausler <phausler at apple.com> wrote:
> 
> 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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