https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85343
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-04-11
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 43909
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43909&action=edit
Patch to overload __throw_ios_failure
This patch is probably the best we can do. In theory we could capture errno as
soon as an error occurs and stash it somewhere in ios_base for later retrieval,
but that would be an ABI break.
With this patch this program:
#include <fstream>
int main()
{
std::ifstream f(".");
f.exceptions(std::ios::badbit);
f.get();
}
Produces the more informative:
basic_filebuf::underflow error reading the file: Is a directory
instead of the generic:
basic_filebuf::underflow error reading the file: iostream error
