Bug#1010838: gtk4: FTBFS on mipsel: rendering testsuite/gsk/compare/rounded-clip-in-clip-3d.node segfaults

[Simon McVittie <smcv@debian.org>]

Source: gtk4
Version: 4.6.3+ds1-1
Severity: serious
Tags: ftbfs
Justification: fails to build from source (but built successfully in the past)
X-Debbugs-Cc: debian-mips@lists.debian.org
User: debian-mips@lists.debian.org
Usertags: mipsel
Control: block 1010813 by -1

During GTK 4's test suite, it carries out the drawing operations described
in testsuite/gsk/compare/rounded-clip-in-clip-3d.node, expecting the result
to match testsuite/gsk/compare/rounded-clip-in-clip-3d.png. On the mipsel
buildds, instead this resulted in a segfault.

This appears to be a regression in 4.6.3, or a regression in some
dependency (perhaps Mesa?) that changed at around the same time we
uploaded 4.6.3. I'm setting up a chroot on the porterbox 'eller' to see
whether I can get a backtrace for this.

I don't know what implications (if any) this has for practical usability
of GTK 4 applications on mipsel.

See also #993550, #1003348 which are other mips*el-specific issues in GTK4
(although they are not crashes, and they affect mips64el, which this one
does not).

    smcv