The expression (1 << (c&7)) is used as a boolean in: pcre, pcre_study:1374 pcre2, src/pcre2_study.c:1455
This is technically a constant true value, as the only potential outcomes are: * no overflow * undefined overflow Nonetheless, considering the '&7' part, overflow is impossible. Thanks for your time, Michael -- ## List details at https://lists.exim.org/mailman/listinfo/pcre-dev
