https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67015
Bug ID: 67015
Summary: "^[a-z0-9][a-z0-9-]*$", std::regex::extended is
miscompiled
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at gcc dot gnu.org
Target Milestone: ---
Created attachment 36055
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36055&action=edit
regex.cc
[forwarded from https://bugs.debian.org/778112]
This regex is failing:
std::regex("^[a-z0-9][a-z0-9-]*$", std::regex::extended);
however this one works:
std::regex("^[a-z0-9][-a-z0-9]*$", std::regex::extended);
I'm unable to reproduce the claim in the original bug report with regex2.cc.
$ cat run.sh
g++-4.8 -static-libstdc++ -std=c++0x regex.cc && ./a.out
g++-4.9 -static-libstdc++ -std=c++0x regex.cc && ./a.out
g++-5 -static-libstdc++ -std=c++0x regex.cc && ./a.out
/usr/lib/gcc-snapshot/bin/g++ -static-libstdc++ -std=c++0x regex.cc && ./a.out
clang++-3.5 -stdlib=libc++ -std=c++0x regex.cc && ./a.out
clang++-3.6 -stdlib=libc++ -std=c++0x regex.cc && ./a.out
g++-4.8 -static-libstdc++ -std=c++0x regex2.cc && ./a.out
g++-4.9 -static-libstdc++ -std=c++0x regex2.cc && ./a.out
g++-5 -static-libstdc++ -std=c++0x regex2.cc && ./a.out
/usr/lib/gcc-snapshot/bin/g++ -static-libstdc++ -std=c++0x regex2.cc && ./a.out
clang++-3.5 -stdlib=libc++ -std=c++0x regex2.cc && ./a.out
clang++-3.6 -stdlib=libc++ -std=c++0x regex2.cc && ./a.out
+ g++-4.8 -static-libstdc++ -std=c++0x regex.cc
+ ./a.out
E0: regex_error
a.out: regex.cc:24: int main(): Assertion `std::regex_match("test",
debian_cron_namespace)' failed.
Aborted (core dumped)
+ g++-4.9 -static-libstdc++ -std=c++0x regex.cc
+ ./a.out
E1: regex_error
+ g++-5 -static-libstdc++ -std=c++0x regex.cc
+ ./a.out
E1: regex_error
+ /usr/lib/gcc-snapshot/bin/g++ -static-libstdc++ -std=c++0x regex.cc
+ ./a.out
E1: regex_error
+ clang++-3.5 -stdlib=libc++ -std=c++0x regex.cc
+ ./a.out
+ clang++-3.6 -stdlib=libc++ -std=c++0x regex.cc
+ ./a.out
+ g++-4.8 -static-libstdc++ -std=c++0x regex2.cc
+ ./a.out
E0: regex_error
E1: regex_error
E2: regex_error
+ g++-4.9 -static-libstdc++ -std=c++0x regex2.cc
+ ./a.out
+ g++-5 -static-libstdc++ -std=c++0x regex2.cc
+ ./a.out
+ /usr/lib/gcc-snapshot/bin/g++ -static-libstdc++ -std=c++0x regex2.cc
+ ./a.out
+ clang++-3.5 -stdlib=libc++ -std=c++0x regex2.cc
+ ./a.out
+ clang++-3.6 -stdlib=libc++ -std=c++0x regex2.cc
+ ./a.out
