Valgrind stops with external error

[Guerrian]

I am running Qt Creator 4.10.1 in Linux Mint 18.3. I get the following external error with the "Valgrind Memory Analyzer" and my "Qt Widgets Application" stops suddenly:

286,959 bytes in 1 blocks are possibly lost in loss record 78 of 78
  in calloc in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so
  1: calloc in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so
  2: /usr/lib/nvidia-384/libGL.so.384.130
  3: /usr/lib/nvidia-384/libnvidia-glcore.so.384.130
  4: /usr/lib/nvidia-384/libnvidia-glcore.so.384.130
  5: /usr/lib/nvidia-384/libGL.so.384.130
  6: /usr/lib/nvidia-384/libGL.so.384.130
  7: /usr/lib/nvidia-384/libGL.so.384.130
  8: call_init.part.0 in /build/glibc-LK5gWL/glibc-2.23/elf/dl-init.c:58
  9: call_init in /build/glibc-LK5gWL/glibc-2.23/elf/dl-init.c:30
  10: _dl_init in /build/glibc-LK5gWL/glibc-2.23/elf/dl-init.c:120
  11: /lib/x86_64-linux-gnu/ld-2.23.so

My project is of "Desktop Qt 5.12.5 GCC 64bit" type.

Note: I get the same problem with fresh "Qt Widgets Application" (I don't see how you can change it to a regular "Desktop" type).

I can't open "dl-init.c", but I'm guessing I shouldn't touch it?

Is it something to do with my video card?

Can I suppress the error and continue the analysis?

Thanks

[jsulm]

@Guerrian Without Valgrind your app is not crashing?
Do you see any other output (warnings/errors) when your app stops?

[Guerrian]

@jsulm Yes, exactly. No other warnings / errors.

11:28:07: valgrind --child-silent-after-fork=yes --xml-socket=127.0.0.1:39845 --log-socket=127.0.0.1:41971
--xml=yes --smc-check=stack --tool=memcheck --gen-suppressions=all --track-origins=yes --leak-check=summary --num-callers=25
/home/daniel/Documents/QtNew/build-TestWidgets-Desktop_Qt_5_12_5_GCC_64bit-Debug/TestWidgets
11:28:13: The program has unexpectedly finished.
11:28:13: Process exited with return value Process crashed
11:28:13: Analyzing finished.

It's just a blank "Qt Widgets Application".

If I run the program normally (i.e. without Valgrind) and close the window then I get this message:

17:07:32: Starting /home/daniel/Documents/QtNew/build-TestWidgets-Desktop_Qt_5_12_5_GCC_64bit-Debug/TestWidgets ...
QApplication: invalid style override passed, ignoring it.
    Available styles: Windows, Fusion
17:07:48: /home/daniel/Documents/QtNew/build-TestWidgets-Desktop_Qt_5_12_5_GCC_64bit-Debug/TestWidgets exited with code 0

Getting rid of this "invalid style" message does not fix the original problem!

[Guerrian]

@jsulm I upgraded Valgrind from source to version "3.15.0" and the crash problem went away.