How can I disable the debug assertion dialog on Windows?

Question

I have a bunch of unit tests that I'm running in batch mode. Occasionally, one will crash with a debug assertion fired from the Visual C++ library. This causes a dialog to pop up, and the unit tests stop running until I click "OK" to close the dialog.

How can I make a C++ program just crash (like on Linux) when it hits an assertion, instead of popping up the annoying dialog?

Note: I do not want to disable assertions; just the dialog.

https://stackoverflow.com/questions/75011809/cant-suppress-msvc-assertion-failure-dialog — Alexander Dyagilev, Jan 05 '23 at 19:33

score 19 · Accepted Answer · edited May 23 '17 at 11:46

19

Check out _CrtSetReportHook():

http://msdn.microsoft.com/en-us/library/0yysf5e6.aspx

MSDN advertises this as a robust way for an application to handle CRT runtime failures like assertions. Presumably you can define a report hook that dumps your process:

How to create minidump for my process when it crashes?

edited May 23 '17 at 11:46

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1

answered Dec 19 '12 at 00:29

HerrJoebob

2,264
16
25

Great -- exactly what I was looking for. – Matt Fichman Dec 19 '12 at 00:47

score 17 · Answer 2 · edited Jan 17 '20 at 04:52

This code will disable display of dialog. Instead, it will print an error in the output window, and stderr.

int main( int argc, char **argv )
{
     if( !IsDebuggerPresent() )
     {
          _CrtSetReportMode( _CRT_ASSERT, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG );
          _CrtSetReportFile( _CRT_ASSERT, _CRTDBG_FILE_STDERR );
     }

     ...
}

The same must be applied for _CRT_ERROR if you use Q_ASSERT from Qt library.

score 0 · Answer 3 · edited May 23 '17 at 12:34

0

I put the code for a suitable hook (that you can install with _CrtSetReportHook()) in: https://stackoverflow.com/a/28852798/2345997

edited May 23 '17 at 12:34

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1
1

answered Mar 16 '15 at 14:10

user1976

353
4
15

How can I disable the debug assertion dialog on Windows?

3 Answers3

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