HTTP/1.1 -1 Read error in cache disk data: SuccessContent-Type: text/tab-separated-values; charset="utf-8" Last-Modified: Sat, 22 Jan 2022 03:07:10 GMT Content-length: 896 Connection: Close Proxy-Connection: Close X-Cache: HIT from web1.osuosl.org Server: ProxyTrack 0.5 (HTTrack 3.49.2) id summary reporter owner description type status priority milestone component version severity resolution keywords cc lang patch platform 1017 recognize the form of alternation coke pmichaud "[http://rt.perl.org/rt3/Ticket/Display.html?id=51850 Original report]. Original Post: {{{ A rule with a space between the '<' and the '?' compiles but fails at execution with the unhelpful message : Unable to find regex '' Null PMC access in invoke() -- cognominal stef }}} Followup: {{{ I agree that this is not a useful error message. However, when PGE is corrected to follow the specification the regex < ?before foo> would be identical to '?before' | 'foo' and no error message would be generated at all. (PGE hasn't been updated to recognize the < a b c > form of alternation.) Pm }}}" todo closed normal PGE trunk medium wontfix common/js/jquery.js">