https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95437
--- Comment #1 from Pedro Alves <palves at redhat dot com> --- > This "missing template parameters info" issue also prevents setting > breakpoints > using the alias template with GCC-built binaries. This GDB commit adds a testcase exercising this issue: https://sourceware.org/pipermail/gdb-patches/2020-May/169163.html It's in the gdb.linespec/cp-replace-typedefs-ns-template.exp testcase which can be run like this: $ make check TESTS="gdb.linespec/cp-replace-typedefs-ns-template.exp" It currently passes cleanly with Clang, and with two XFAILs with GCC.