https://bugs.exim.org/show_bug.cgi?id=2043
--- Comment #3 from Petr Pisar <ppi...@redhat.com> --- And isprint() has undefined behavior on values that cannot be represented in unsigned char although the argument has type int. This is defined by ISO C and POSIX. See similar bug report <https://bugzilla.redhat.com/show_bug.cgi?id=189525>. One should use iswprint() instead probably. But that requires conversion to wchar_t. -- You are receiving this mail because: You are on the CC list for the bug. -- ## List details at https://lists.exim.org/mailman/listinfo/pcre-dev