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Commit 452be812 I'm attempting to build font-config on iOS, which I know is not a target device, but I've been unable to debug this myself.

Here's what I know from system logs (full log attached):

Thread 0 Crashed:
0       libfontconfig.1.dylib           0x100b3b84c 0x100b1c000 + 0x1f84c   // /Library/x/fontconfig/src/fcobjs.c:160
1       libfontconfig.1.dylib           0x100b3b840 0x100b1c000 + 0x1f840   // /Library/x/fontconfig/src/fcobjs.c:159
2       libfontconfig.1.dylib           0x100b3a1ec 0x100b1c000 + 0x1e1ec   // /Library/x/fontconfig/src/fcname.c:131
3       libfontconfig.1.dylib           0x100b457d8 0x100b1c000 + 0x297d8   // /Library/x/fontconfig/src/fcxml.c:820
4       libexpat.1.dylib                0x101006b34 0x100ff8000 + 0xeb34    // /Library/x/expat-2.2.9/lib/xmlparse.c:2848
5       libexpat.1.dylib                0x101004134 0x100ff8000 + 0xc134    // /Library/x/expat-2.2.9/lib/xmlparse.c:2445
6       libexpat.1.dylib                0x101001b38 0x100ff8000 + 0x9b38    // /Library/x/expat-2.2.9/lib/xmlparse.c:3921
7       libexpat.1.dylib                0x1010014e0 0x100ff8000 + 0x94e0    // /Library/x/expat-2.2.9/lib/xmlparse.c:1893

This occurs whether I use libxml or expat.

The relevant lines of code: https://gitlab.freedesktop.org/fontconfig/fontconfig/blob/master/src/fcobjs.c#L160

https://gitlab.freedesktop.org/fontconfig/fontconfig/blob/master/src/fcname.c#L131

https://gitlab.freedesktop.org/fontconfig/fontconfig/blob/master/src/fcxml.c#L820

This same error occurs in many fc-* tools.

Any help would be appreciated!

fullcrashlog.txt