[Interest] Debugging a double dealloc

[Ben Haller]

Thanks Giuseppe; this looks very interesting.  I’d love to be able to run Valgrind.

Thanks also to Mitch; I see your email now, and it also looks very useful.  To avoid spamming the list with thank-yous, I’ll just say in advance, thanks to all others who might respond with helpful suggestions.  :->

Cheers,
-B.

Benjamin C. Haller
Messer Lab
Cornell University


> On Sep 23, 2020, at 8:41 AM, Giuseppe D'Angelo via Interest <interest at qt-project.org> wrote:
> 
> Il 23/09/20 14:08, Ben Haller via Interest ha scritto:
>> Thanks for the suggestion.  However, this problem is only on macOS, and Valgrind doesn’t appear to run on any macOS later than 10.12 (“preliminary” support for 10.13, according to their website; I’m not sure what that means).  I’m on macOS 10.15.6, and I’m using Qt 5.14.2 which has a minimum macOS version of 10.13, so Valgrind seems to be a no-go for at least one reason, perhaps two reasons (depending on “preliminary”).
> 
> There is a fork of Valgrind to support more modern macOS versions
> 
> https://github.com/LouisBrunner/valgrind-macos/
> 
> (Note: never used it myself, not a mac user).
> 
> Another option is getting a recent Clang version and rebuilding Qt and your app with AddressSanitizer.
> 
> HTH,
> 
> -- 
> Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
> KDAB (France) S.A.S., a KDAB Group company
> Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
> KDAB - The Qt, C++ and OpenGL Experts
> 
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