I could successfully reproduce with debug information.
The bug match to this report:
https://bugs.launchpad.net/ubuntu/+source/procps/+bug/965341
The problem lie with the handling of wide characters.
line 441 of watch.c
#ifdef WITH_WATCH8BIT
do {
if (carry == WEOF) {
c = my_getwc(p);
} else {
c = carry;
carry = WEOF;
}
} while (c != WEOF && !isprint(c)
the crash happens when isprint() is getting value of c with more than
2 bytes set.
Sorry if the bug is only related to ubuntu patches.
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