On Thu, Apr 21, 2016 at 9:11 AM, Zan Lynx <zl...@acm.org> wrote: > I would like someone to look at this and tell me this is an already > fixed bug. Or that recent GCC patches may have fixed it. :-) > > Or it would also be great to get some advice on building a reproducer > without needing to include many megabytes of proprietary code plus Boost. > > I've been using Fedora 24 Alpha and of course I've somehow managed to > write some C++ code even more confusing for GCC than Firefox. Heh. > > The problem is a crash when std::string tries to free memory from a > temporary std::string that was bound to a const reference. > > And it only crashes when I pass -O2 or -O3 and the -fprofile-generate flags.
What is the return type of URLDatabaseReader_1::identifier() ? Also does -fsanitize=undefined say anything about your code? Thanks, Andrew > > $ gcc -v > Using built-in specs. > COLLECT_GCC=/usr/bin/gcc > COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/6.0.0/lto-wrapper > Target: x86_64-redhat-linux > Configured with: ../configure --enable-bootstrap > --enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr > --mandir=/usr/share/man --infodir=/usr/share/info > --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared > --enable-threads=posix --enable-checking=release --enable-multilib > --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions > --enable-gnu-unique-object --enable-linker-build-id > --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array > --disable-libgcj --with-isl --enable-libmpx > --enable-gnu-indirect-function --with-tune=generic --with-arch_32=i686 > --build=x86_64-redhat-linux > Thread model: posix > gcc version 6.0.0 20160406 (Red Hat 6.0.0-0.20) (GCC) > > I collected my findings so far into the attachment. > > Thanks for reading! > > -- > Knowledge is Power -- Power Corrupts > Study Hard -- Be Evil
