http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58576
Bug ID: 58576
Summary: std::regex_match() reports mismatched braces on a
valid regex
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: galens at capaccess dot org
Created attachment 30929
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30929&action=edit
Archive containing the g++ -v -save-temps compile log, the generated .ii file
and the original .cpp with the minimum-to-reproduce test case.
I attempted to use a regex to validate qualified hostnames.
However, when I used the regex from this thread (
http://stackoverflow.com/questions/1418423/the-hostname-regex ), with or
without replacing the [0-9A-Za-z] with [:alnum:] (and properly escaping the
backslashes), I get a regex_error exception thrown on std::regex_match() call,
with a regex_constants::error_brack as the reported code().
Using: An unmodified copy of gcc 4.8.1 20130603 from the Fedora 19 primary
repository (rpm ver: 4.8.1-1.fc19 )
(I use 4-spaces-per-tab in my source code, which isn't relevant for the code,
but might make hand-tracing of Parens, Braces, and Brackets I did in comments
more understandable.)
(And, yes, I know replacing [0-9A-Za-z] with [:alnum:] isn't a legitimate
change WRT domain name validity, unless I force a 'C' locale. It was just
easier to read when hunting down this issue.)
