[Bug preprocessor/63831] [5 Regression] r217292 causes segfaults with -MM

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63831

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|emsr at gcc dot gnu.org            |jakub at gcc dot gnu.org

--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 34199
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34199&action=edit
gcc5-pr63831.patch

Untested fix.