[Bug libstdc++/29026] New: std::basic_istream<>::sentry() fails to catch when reading whitespace

["jimrees at itasoftware dot com" <gcc-bugzilla at gcc dot gnu dot org>]

27.6.1.1 P4 says that formatted input functions should set badbit if a call to
fetch characters from the streambuf throws an exception.

The implementation of this in bits/istream.tcc is done after the sentry is
constructed.  But the sentry's constructor may try to read whitespace, and it
is not doing any exception handling, so ios_base::badbit is not getting set in
this case.


-- 
           Summary: std::basic_istream<>::sentry() fails to catch when
                    reading whitespace
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jimrees at itasoftware dot com
 GCC build triplet: x86_64-redhat-linux
  GCC host triplet: x86_64-redhat-linux
GCC target triplet: x86_64-redhat-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29026