parse-datetime: fix failure to diagnose invalid input date -d "$(printf '\xb0')" would print 00:00:00 with today's date rather than diagnosing the invalid input. Now it reports this: date: invalid date '\260' * lib/parse-datetime.y (to_uchar): Define. (yylex): Don't sign-extend "other" bytes. * m4/parse-datetime.m4: Require AC_C_INLINE for first use of "inline". Thanks to Bruno Haible for the patch to this file. * tests/test-parse-datetime.c (main): Add a test to trigger the bug. Peter Evans reported the bug in GNU date: http://bugs.gnu.org/11843