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http://bugs.exim.org/show_bug.cgi?id=1504
Summary: DFA matching seems to have regressed, causing GLib test
failure
Product: PCRE
Version: 8.35
Platform: Other
OS/Version: Linux
Status: NEW
Severity: bug
Priority: medium
Component: Code
AssignedTo: ph10@???
ReportedBy: smcv@???
CC: pcre-dev@???
Created an attachment (id=742)
--> (
http://bugs.exim.org/attachment.cgi?id=742)
test case
GLib 2.40, which was written with PCRE 8.31 in mind, is failing its regex tests
when compiled against a system installation of PCRE 8.35. Some of these
failures can be explained by changes in PCRE 8.32 and 8.34: the tests
incorrectly assert that a PCRE 8.31 bug fixed in 8.32 is still present, and
also exercise (?P<1>), for which support was deliberately removed in 8.34.
However, after cutting out those test cases, DFA matching
(g_regex_match_all()/pcre_dfa_exec()) still seems to have regressed. I have
reduced one of the failing cases down to a "pure PCRE" test-case which passes
with Debian's pcre3/8.31-5, but fails with 8.35-1 and 8.35-2: matching the
regex "a+" against target string "aaa" only matches once, "aaa", whereas it
should have matched three times at offset 0, "aaa", "aa" and "a".
The GLib bug: <
https://bugzilla.gnome.org/show_bug.cgi?id=733325>
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