I encountered the following situation with xelatex.
$ echo x | xelatex \\showthe\\everyjob
This is XeTeX, Version 3.14159265-2.6-0.99996 (TeX Live 2016)
In r43113 in TeX Live SVN, I have changed texmfmp.c a little:
--- texmfmp.c.orig Mon Nov 14 16:21:07 2016
+++ texmfmp.c Wed Feb 01 13:27:04 2017
@@ -2818,6 +2818,8 @@
unsigned bytesToWrite = 0;
poolpointer len, i, j;
string name;
+ if (strstart[s + 1 - 65536L] < strstart[s - 65536L])
+ return NULL;
len = strstart[s + 1 - 65536L] - strstart[s - 65536L];
name = xmalloc(len * 3 + 1); /* max UTF16->UTF8 expansion
(code units, not bytes) */
in order to avoid the crash. The change must not give bad effects.
It is not a fix but a stopgap for the problem.
Best,
Akira
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