[Fontconfig-bugs] [Bug 96609] Assertion failed: (dx > 0 && dy >= 0 && x1 <= x && x <= x2), function lerp, file fcweight.c, line 48.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96609

--- Comment #6 from Ryan Schmidt <freedesktop at ryandesign.com> ---
First, I had to codesign gdb and fix its permissions and ownership so that it
could control other processes:

https://sourceware.org/gdb/wiki/BuildingOnDarwin

Then, /opt/local/bin/wine is not a compiled binary in MacPorts; it is a shell
script that sets DYLD_FALLBACK_LIBRARY_PATH="/opt/local/lib:/usr/lib" and then
calls the compiled binary /opt/local/libexec/wine/wine with the script's
arguments. wine does not work on OS X if DYLD_FALLBACK_LIBRARY_PATH is not set.
gdb does not seem to want to run scripts; it only wants to run compiled
binaries. I tried various ways of setting the environment variable before
telling gdb to run /opt/local/libexec/wine/wine, which all failed, except when
I finally created a temporary shell script /tmp/runwine with the contents:

#!/bin/sh
DYLD_FALLBACK_LIBRARY_PATH="/opt/local/lib:/usr/lib" "$@"

Then I was able to get gdb to run winecfg by running:

$ ggdb /opt/local/libexec/wine/wine
(gdb) set exec-wrapper /tmp/runwine
(gdb) run winecfg

However, gdb did not break on assertions, and running "bt" produces the message
"No stack."

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