[llvm-bugs] [Bug 33681] New: Iterating using regex_iterator never ends

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33681

            Bug ID: 33681
           Summary: Iterating using regex_iterator never ends
           Product: libc++
           Version: 3.9
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: karen at codesynthesis.com
                CC: llvm-bugs at lists.llvm.org, mclow.lists at gmail.com

While using regex_iterator template in our build2 toolchain project we have
discovered that for some regular expressions the end iterator can never be
reached.

The issue can be reproduced with the following code:

std::string s ("foo");
std::regex re (".*");

using it = std::regex_iterator<std::string::const_iterator>;

for (it i (s.begin (), s.end (), re), e; i != e; ++i) ; // Hangs.

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