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http://bugs.exim.org/show_bug.cgi?id=892
--- Comment #2 from Philip Hazel <ph10@???> 2009-09-29 12:06:17 ---
This is an inevitable consequence of the way duplicate names are fudged into
PCRE, and is a related issue to #760. The problem is that the compiled code
works entirely in terms of capturing parenthesis numbers, not names. When
compiling the test for "is pattern <name> set?" it just picks the first number
that is associated with <name>. In your pattern, the compiled code contains a
test for subpattern number 1.
A deeper question is this: If there are two or more subpatterns with the same
name, what does "is pattern <name> set?" actually mean? Does it mean "any" or
"all" of the named subpatterns? I suppose "any" is the more useful.
This is unlikely to be changed soon, unless I can think of some cunning way of
handling it. I am in the last stages of preparing a new release; I can't say
whether I will have inspiration in time or not...
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