https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71044
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> --- Author: redi Date: Mon Dec 17 22:43:31 2018 New Revision: 267222 URL: https://gcc.gnu.org/viewcvs?rev=267222&root=gcc&view=rev Log: PR libstdc++/71044 fix off-by-one errors introduced recently The recent changes to append/concat directly from strings (without constructing paths) introduced regressions where one of the components could be omitted from the iteration sequence in the result. PR libstdc++/71044 * src/filesystem/std-path.cc (path::_M_append): Fix off-by-one error that caused a component to be lost from the iteration sequence. (path::_M_concat): Likewise. * testsuite/27_io/filesystem/path/append/source.cc: Test appending long strings. * testsuite/27_io/filesystem/path/concat/strings.cc: Test concatenating long strings. * testsuite/27_io/filesystem/path/construct/string_view.cc: Test construction from long string. Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/src/filesystem/std-path.cc trunk/libstdc++-v3/testsuite/27_io/filesystem/path/append/source.cc trunk/libstdc++-v3/testsuite/27_io/filesystem/path/concat/strings.cc trunk/libstdc++-v3/testsuite/27_io/filesystem/path/construct/string_view.cc