https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90646
Bug ID: 90646
Summary: std::filesystem::absolute( "yourpathhere" ) segfaults
Product: gcc
Version: 9.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: myLC at gmx dot net
Target Milestone: ---
This used to work with g++-8.1.0, but segfaults with g++-9.1.0:
std::optional< std::string > Config::read( const std::filesystem::path &path,
const std::string &filename ) {
std::string s;
if( !filename.empty() ) {
std::filesystem::path file( path );
file /= filename;
if( std::filesystem::exists( file ) ) {
std::ifstream input( std::filesystem::absolute( file )
);
std::stringstream buffer;
buffer << input.rdbuf();
if( input.bad() )
goto errout;
s = buffer.str();
}
} else {
errout: return {};
}
return s;
}
Now it crashes at calling "std::filesystem::absolute( file )":
Thread 1 "config_module" received signal SIGSEGV, Segmentation fault.
0x0000000000462b2f in std::unique_ptr<std::filesystem::path::_List::_Impl,
std::filesystem::path::_List::_Impl_deleter>::~unique_ptr (
this=0xb, __in_chrg=<optimized out>) at
/usr/include/c++/9/bits/unique_ptr.h:288
288 if (__ptr != nullptr)
(gdb) p __ptr
$1 = (std::filesystem::path::_List::_Impl *&) @0x7fffffffd1d8: 0x0
(gdb)
