zp_fontconfig_cache_1.sh exit code 2

["Mark McGregor" <mark dot mcgregor at gmx dot de>]

... and after one more installation, I get exit code 1. Don't ask me why. Here is a relevant portion of the log for the following installation:

[
...
2016/06/12 23:23:38 running: C:\cygwin64\bin\dash.exe "/etc/postinstall/0p_update-info-dir.dash"
Rebuilding info directory
install-info: /usr/share/info/de.utf8: empty file
install-info: /usr/share/info/es.utf8: empty file
install-info: warning: no info dir entry in `/usr/share/info/maxima-index.lisp'
install-info: /usr/share/info/pt.utf8: empty file
install-info: /usr/share/info/pt_BR.utf8: empty file
install-info: warning: no info dir entry in `/usr/share/info/texdraw.info.gz'
2016/06/12 23:23:44 running: C:\cygwin64\bin\bash.exe --norc --noprofile "/etc/postinstall/zp_desktop-file-utils.sh"
2016/06/12 23:23:44 running: C:\cygwin64\bin\bash.exe --norc --noprofile "/etc/postinstall/zp_fontconfig_cache_1.sh"
/usr/share/texmf-dist/fonts/type1/public: failed to write cache
2016/06/12 23:23:54 abnormal exit: exit code=1
...
]

Executing this guy afterwards seems ok:
$ /etc/postinstall/zp_fontconfig_cache_1.sh
$ echo $?
0


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