[0/2] Improve error messages with incomplete variables

  Currently, if a user attempts to call a C++ fuction by hand using an
incomplete variable, GDB might be unable to find the correct overload,
but the error message in this situation is not intuitive at all. This
series attempts improve those messages with a hint.

To create a reasonably reproducible test, I decided to use the DWARF
assembler, but it needed some fixing to deal with C++ mangled names, so
the first patch happened.

Bruno Larsen (2):
  gdb/testsuite: allowed for function_range to deal with mangled
    functions
  gdb/c++: Improve error messages in overload resolution

 .../gdb.cp/incomplete-type-overload.cc        |  45 +++++
 .../gdb.cp/incomplete-type-overload.exp       | 183 ++++++++++++++++++
 gdb/testsuite/lib/dwarf.exp                   |  12 ++
 gdb/valops.c                                  |  49 ++++-
 4 files changed, 285 insertions(+), 4 deletions(-)
 create mode 100644 gdb/testsuite/gdb.cp/incomplete-type-overload.cc
 create mode 100644 gdb/testsuite/gdb.cp/incomplete-type-overload.exp