compressed .wrl (.wrz) files silently fail to decompress

[evils]

first encountered in the Nixpkgs package,
i had initially opened a FreeCAD issue because a friend of mine reproduced the problem on linux mint with flatpak
however there we failed to reproduce it on windows, ubuntu and in the appimage
therefore i filed a Nixpkgs issue
and am opening this issue

the issues linked above have more details and outline steps to reproduce the problem

a similar issue occurs in the Nix package for KiCad, but not in the flatpak package for KiCad

[hfiguiere]

Where can we find such a file to try?

[evils]

any .wrl or .wrz should (not) work
in the other issues i linked to this file which i've been using

which then should be exported as a .wrz and that .wrz opened to see the issue

[hfiguiere]

Oh that's a fun one.

If I start FreeCAD with --devel (this loosen the sandbox to allow a debugger or strace), then it works.

I think we should disable the dynamic loading

[adrianinsaval]

I see this in terminal when trying to do this>

Coin error in zlib glue(): Unable to load zlib DLL/shared object.
Coin warning in SoInput::setBuffer(): Buffer seems to be in gzip format, but zlib support is not available.
Coin read error: Erroneous character(s) after end of scene graph: "". This message will only be shown once for this file, but more errors might be present
	Occurred at line   1 in <memory>

are we building coin wrong?