Setting G_SLICE env variable to any non-empty value freezes GLib programs

[khaledhosny]

While debugging harfbuzz/harfbuzz#2697, I found that any non-empty value of this env variable freezes GLib applications. E.g.

#include <glib.h>
int main(int argc, char** argv) {
  g_print("Test\n");
}

Building with gcc test.c -o test $(pkg-config --cflags --libs glib-2.0). Runnig without the env variable set is fine, setting it to even just G_SLICE=' ' will cause the program to just freeze (nothing is printed and not returning either).

[lazka]

Thanks! I was seeing the same thing with pygobject but didn't investigate yet.

[lazka]

I can confirm that downgrading glib to 2.64.5 fixes things.

[lazka]

Bisected and filed an issue in glib: https://gitlab.gnome.org/GNOME/glib/-/issues/2225

[khaledhosny]

Thanks, I did suspect it is this commit but didn’t mange to build glib and verify.

[khaledhosny]

Thanks!

[lazka]

the fix is in the repo now

[khaledhosny]

I confirm that HarfBuzz CI builds are fixed now. Thanks again for the quick fix.

[lazka]

Thanks for figuring out the cause!