[fpc-pascal] unexpected termination with no errors

DaWorm daworm at gmail.com
Wed May 15 18:13:06 CEST 2019

Isn't that negative number 0xC0000005 in hex?  If that's the case, it's an
Access Violation and not Disk Full.


On Wed, May 15, 2019 at 11:44 AM James Richters <
james at productionautomation.net> wrote:

> It's a simple single thread console app.   I found my problem...  years
> ago I implemented a batch file to run my program in the test environment to
> help be with debugging... and what it does is redirect the errors to a file
> so that if flashed by real quick, I would be able to just look at the
> file.   Then I just echo the file to the screen, and if I detect an error,
> I also pause so I can see it.    This a common solution to the windows
> limitation of not be capable directing STDERR to console AND to a file.
> Well the file wasn't reporting the error and it wasn't on the screen... it
> looked like a normal exit, BUT it was actually giving me the proper
> report... unfortunately the error was the one thing that my batch file
> could not possibly display....  EInOutError: Disk Full   DOH!!!  With the
> disk full my log file could only show up to but not including the error...
> because it could not write anymore on a full disk... I still don't have a
> great solution for this... I see methods of implementing something like a
> Tee function on windows, but the problem is I don't want ALL the output to
> go to the log, I only want STDERR to go to the log file.... and the
> screen...  not my output I am sending with the CRT unit that sends colored
> text for various purposes.  This is such a pain with windows to accomplish
> this seemingly simple task.    Anyway I know what the problem is and can
> put in something to detect it.  Maybe I will just check if the errorlevel
> is negative and if so write a suggestion to the screen that disk full may
> have caused this and then pause.... since I can't necessarily write
> anything to the file.
> Does anyone know what the errorlevel for EInOutError: Disk Full is
> -1073741819,   (I'm not sure it's always that number... ) is this on
> purpose?, or a bug?, or a side effect of the disk being full so it can't
> generate the correct error code?   if it was a normal errorcode I would
> have got that on my screen but since it's less than zero it got treated
> like a normal exit.... I did fix my batch file to treat anything less than
> zero as an error..... so it doesn't really matter, I just didn't know they
> could be negative, but I'm curious why this strange errorlevel.
> Jim
> -----Original Message-----
> From: fpc-pascal <fpc-pascal-bounces at lists.freepascal.org> On Behalf Of
> Karoly Balogh (Charlie/SGR)
> Sent: Wednesday, May 15, 2019 9:17 AM
> To: FPC-Pascal users discussions <fpc-pascal at lists.freepascal.org>
> Subject: Re: [fpc-pascal] unexpected termination with no errors
> Hi,
> On Wed, 15 May 2019, James Richters wrote:
> > Has anyone encountered anything like this before or know how I can
> > make sure I always get the maximum amount of debugging info when my
> > program crashes?
> Is it a subthreaded app?
> The only case when I noticed something similar (under Linux though), when
> a certain subthread throws an exception, it just silently disappears
> without any further handling. It doesn't throw any exception, unless you
> wrap the entire Execute method in a try-except.
> (Sidenote: I've been pondering for a while if I should report this as a
> bug. I think the RTL should put a try-except around there, to show a
> stacktrace on unhandled exceptions, just like the main thread dying does,
> but who knows which Delphi de-facto standard behavior would that violate,
> so meh...)
> In Linux/Darwin (on x64/ARM at least), only the thread causing the problem
> dies, no clue what happens under Windows. Maybe this helps.
> Charlie
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