<div dir="ltr"><div>Hi,</div><div><br></div>I have a rather bizarre intermittent failure that I'd see if anyone else can reproduce.<div><br><div>I've taken the following: </div><div>   <a href="http://files.squeak.org/5.3/Squeak5.3-19435-64bit/Squeak5.3-19435-64bit-202003021730-Linux.zip">http://files.squeak.org/5.3/Squeak5.3-19435-64bit/Squeak5.3-19435-64bit-202003021730-Linux.zip</a></div><div><br></div><div>Started it up and loaded the latest system updates and the OSProcess package (access OS functions).</div><div><br></div><div>I then did:</div><div><br></div><div>    CommandShell command: 'date'</div><div><br></div><div>This works as I'd expect it too.</div><div><br></div><div>However, what is interesting is that if I change the time on the machine to any time between 7:36AM and 10:36AM (PDT, I'm in San Jose, CA) for today (May 19th) this call fails with the stack below.  I'm quitting the image between time changes.</div><div><br></div><div>There was no failure for the same time period yesterday.  Nor does it appear to fail for any other time period today.</div><div><br></div><div>-- Bob</div><div><br></div><div>Stack follows:</div><div><br></div><div>19 May 2021 10:30:20.503624 am<br><br>VM: unix - Smalltalk<br>Image: Squeak5.3 [latest update: #19458]<br><br>SecurityManager state:<br>Restricted: false<br>FileAccess: true<br>SocketAccess: true<br>Working Dir /scratch/bwesterg/squeak/Squeak5.3-19435-64bit-202003021730-Linux/shared<br>Trusted Dir /scratch/bwesterg/squeak/Squeak5.3-19435-64bit-202003021730-Linux/shared/secure<br>Untrusted Dir /scratch/bwesterg/squeak/Squeak5.3-19435-64bit-202003021730-Linux/shared/My Squeak<br><br>AioEventHandler(Object)>>notify:<br>        Receiver: an AioEventHandler<br>  Arguments and temporary variables: <br>           aString:        'aio event forwarding not supported'<br>  Receiver's instance variables: <br>           dependents:     nil<br>           semaphore:      nil<br>           semaIndex:      nil<br>           handlerProc:    nil<br>           descriptor:     nil<br><br>[] in AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br>   Receiver: an AioEventHandler<br>  Arguments and temporary variables: <br><<error during printing><br>        Receiver's instance variables: <br>           dependents:     nil<br>           semaphore:      nil<br>           semaIndex:      nil<br>           handlerProc:    nil<br>           descriptor:     nil<br><br>BlockClosure>>cull:<br>      Receiver: [closure] in AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br> Arguments and temporary variables: <br>           firstArg:       Warning: aio event forwarding not supported<br>   Receiver's instance variables: <br>           outerContext:   AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br>                startpc:        154<br>           numArgs:        1<br><br>[] in Context>>handleSignal:<br>       Receiver: BlockClosure>>on:do:<br>  Arguments and temporary variables: <br><<error during printing><br>        Receiver's instance variables: <br>           sender:         AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br>                pc:     32<br>            stackp:         3<br>             method:         (BlockClosure>>#on:do: "a CompiledMethod(1660548)")<br>           closureOrNil:   nil<br>           receiver:       [closure] in AioEventHandler>>initializeForExceptions:readEvents:writeEvents:...etc...<br><br>BlockClosure>>ensure:<br>   Receiver: [closure] in Context>>handleSignal:<br>   Arguments and temporary variables: <br>           aBlock:         [closure] in Context>>handleSignal:<br>             complete:       nil<br>           returnValue:    nil<br>   Receiver's instance variables: <br>           outerContext:   Context>>handleSignal:<br>          startpc:        174<br>           numArgs:        0<br><br>Context>>handleSignal:<br>     Receiver: BlockClosure>>on:do:<br>  Arguments and temporary variables: <br>           exception:      Warning: aio event forwarding not supported<br>           handlerActive:  true<br>          val:    nil<br>   Receiver's instance variables: <br>           sender:         AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br>                pc:     32<br>            stackp:         3<br>             method:         (BlockClosure>>#on:do: "a CompiledMethod(1660548)")<br>           closureOrNil:   nil<br>           receiver:       [closure] in AioEventHandler>>initializeForExceptions:readEvents:writeEvents:...etc...<br><br>Warning(Exception)>>signal<br>      Receiver: Warning: aio event forwarding not supported<br> Arguments and temporary variables: <br><br> Receiver's instance variables: <br>           messageText:    'aio event forwarding not supported'<br>          tag:    nil<br>           signalContext:  Warning(Exception)>>signal<br>              handlerContext:         BlockClosure>>on:do:<br>            outerContext:   nil<br><br>Warning(Exception)>>signal:<br>      Receiver: Warning: aio event forwarding not supported<br> Arguments and temporary variables: <br>           signalerText:   'aio event forwarding not supported'<br>  Receiver's instance variables: <br>           messageText:    'aio event forwarding not supported'<br>          tag:    nil<br>           signalContext:  Warning(Exception)>>signal<br>              handlerContext:         BlockClosure>>on:do:<br>            outerContext:   nil<br><br>Warning class>>signal:<br>   Receiver: Warning<br>     Arguments and temporary variables: <br>           signalerText:   'aio event forwarding not supported'<br>  Receiver's instance variables: <br>           superclass:     Notification<br>          methodDict:     a MethodDictionary(#defaultAction->(Warning>>#defaultAction "a CompiledMethod...etc...<br>          format:         65541<br>         instanceVariables:      nil<br>           organization:   ('priv handling' defaultAction)<br><br>             subclasses:     {Deprecation . ServiceCancelled . SAXWarning . UndeclaredVariableWarning...etc...<br>             name:   #Warning<br>              classPool:      nil<br>           sharedPools:    nil<br>           environment:    nil<br>           category:       #'Kernel-Exceptions'<br>          suppressed:     false<br>         resetOnStartUp:         false<br><br>AioEventHandler(Object)>>notify:<br>       Receiver: an AioEventHandler<br>  Arguments and temporary variables: <br>           aString:        'aio event forwarding not supported'<br>  Receiver's instance variables: <br>           dependents:     nil<br>           semaphore:      nil<br>           semaIndex:      nil<br>           handlerProc:    nil<br>           descriptor:     nil<br><br>AioEventHandler>>aioEnable:forSemaphore:externalObject:<br>  Receiver: an AioEventHandler<br>  Arguments and temporary variables: <br>           ioDescriptor:   nil<br>           semaphoreIndex:         17<br>            trueOrFalse:    true<br>  Receiver's instance variables: <br>           dependents:     nil<br>           semaphore:      nil<br>           semaIndex:      nil<br>           handlerProc:    nil<br>           descriptor:     nil<br><br>[] in AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br>   Receiver: an AioEventHandler<br>  Arguments and temporary variables: <br><<error during printing><br>        Receiver's instance variables: <br>           dependents:     nil<br>           semaphore:      nil<br>           semaIndex:      nil<br>           handlerProc:    nil<br>           descriptor:     nil<br><br>BlockClosure>>on:do:<br>     Receiver: [closure] in AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br> Arguments and temporary variables: <br>           exceptionOrExceptionSet:        Warning<br>               handlerAction:  [closure] in AioEventHandler>>initializeForExceptions:readEvents:writeEvents:...etc...<br>          handlerActive:  false<br> Receiver's instance variables: <br>           outerContext:   AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br>                startpc:        140<br>           numArgs:        0<br><br>AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br>   Receiver: an AioEventHandler<br>  Arguments and temporary variables: <br>           exceptionEventFlag:     true<br>          readEventFlag:  true<br>          writeEventFlag:         false<br> Receiver's instance variables: <br>           dependents:     nil<br>           semaphore:      nil<br>           semaIndex:      nil<br>           handlerProc:    nil<br>           descriptor:     nil<br><br>AioEventHandler>>forFileStream:exceptions:readEvents:writeEvents:<br>        Receiver: an AioEventHandler<br>  Arguments and temporary variables: <br>           aFileStream:    BufferedAsyncFileReadStream: 'pipeReader'<br>             exceptionEventFlag:     true<br>          readEventFlag:  true<br>          writeEventFlag:         false<br> Receiver's instance variables: <br>           dependents:     nil<br>           semaphore:      nil<br>           semaIndex:      nil<br>           handlerProc:    nil<br>           descriptor:     nil<br><br>AioEventHandler class>>forFileStream:exceptions:readEvents:writeEvents:<br>  Receiver: AioEventHandler<br>     Arguments and temporary variables: <br>           aFileStream:    BufferedAsyncFileReadStream: 'pipeReader'<br>             exceptionEventFlag:     true<br>          readEventFlag:  true<br>          writeEventFlag:         false<br> Receiver's instance variables: <br>           superclass:     Model<br>         methodDict:     a MethodDictionary(#aioDisable:->(AioEventHandler>>#aioDisable: "a CompiledMethod...etc...<br>              format:         65541<br>         instanceVariables:      #('semaphore' 'semaIndex' 'handlerProc' 'descriptor')<br>         organization:   ('aio event forwarding' aioDisable: aioEnable:forSemaphore:externalObject:...etc...<br>           subclasses:     nil<br>           name:   #AioEventHandler<br>              classPool:      a Dictionary(#AioPluginPresent->true )<br>             sharedPools:    nil<br>           environment:    Smalltalk<br>             category:       #'OSProcess-AIO'<br><br>BufferedAsyncFileReadStream(AsyncFileReadStream)>>enableEventHandling<br>       Receiver: BufferedAsyncFileReadStream: 'pipeReader'<br>   Arguments and temporary variables: <br><br> Receiver's instance variables: <br><br><br>BufferedAsyncFileReadStream(AsyncFileReadStream)>>initialize<br>   Receiver: BufferedAsyncFileReadStream: 'pipeReader'<br>   Arguments and temporary variables: <br><br> Receiver's instance variables: <br><br><br>BufferedAsyncFileReadStream class(AttachableFileStream class)>>name:attachTo:writable:<br> Receiver: BufferedAsyncFileReadStream<br> Arguments and temporary variables: <br>           aSymbolOrString:        'pipeReader'<br>          anIOHandle:     #[93 179 159 128 0 0 0 0 48 162 123 2 0 0 0 0 0 0 0 0 0 0 0 0]<br>                readWriteFlag:  false<br> Receiver's instance variables: <br>           superclass:     AsyncFileReadStream<br>           methodDict:     a MethodDictionary(#actAsExecutor->(BufferedAsyncFileReadStream>>#a...etc...<br>         format:         65552<br>         instanceVariables:      #('nonBlockingMode' 'readBuffer' 'readSyncSemaphore' 'dataAv...etc...<br>             organization:   ('finalization' actAsExecutor)<br>('read ahead buffer' appendAllToBuffer:...etc...<br>              subclasses:     nil<br>           name:   #BufferedAsyncFileReadStream<br>          classPool:      nil<br>           sharedPools:    nil<br>           environment:    Smalltalk<br>             category:       #'OSProcess-Base'<br><br><br>--- The full stack ---<br>AioEventHandler(Object)>>notify:<br>[] in AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br>BlockClosure>>cull:<br>[] in Context>>handleSignal:<br>BlockClosure>>ensure:<br>Context>>handleSignal:<br>Warning(Exception)>>signal<br>Warning(Exception)>>signal:<br>Warning class>>signal:<br>AioEventHandler(Object)>>notify:<br>AioEventHandler>>aioEnable:forSemaphore:externalObject:<br>[] in AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br>BlockClosure>>on:do:<br>AioEventHandler>>initializeForExceptions:readEvents:writeEvents:<br>AioEventHandler>>forFileStream:exceptions:readEvents:writeEvents:<br>AioEventHandler class>>forFileStream:exceptions:readEvents:writeEvents:<br>BufferedAsyncFileReadStream(AsyncFileReadStream)>>enableEventHandling<br>BufferedAsyncFileReadStream(AsyncFileReadStream)>>initialize<br>BufferedAsyncFileReadStream class(AttachableFileStream class)>>name:attachTo:writable:<br> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -<br>AttachableFileStream>>asBufferedAsyncFileReadStream<br>ExternalPipe>>setBufferedReader<br>PipeableOSProcess(PipeJunction)>>enableOutputStreamTriggers<br>PipeableOSProcess>>enableEventTriggers<br>PipeableOSProcess(PipeJunction)>>prepareOutputForInternalReader<br>PipeableOSProcess>>prepareOutputForInternalReader<br>PipeableOSProcess(PipeJunction)>>prepareOutputFor:<br>ProxyPipeline>>fromString:shell:<br>ProxyPipeline class>>fromString:shell:<br>CommandShell>>pipelineCollectionFrom:<br>CommandShell>>evaluateOrMakePipelinesFrom:<br>CommandShell>>command:echo:<br>[] in CommandShell>>processCommand:echo:<br>[] in BlockClosure>>newProcess<br></div></div></div>