[Bug c++/79420] [7 Regression] ICE on invalid C++ code on x86_64-linux-gnu: in tsubst_copy, at cp/pt.c:14573

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79420

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
We've got a dot expression 'f.x', where the postfix expression 'f' is an
OVERLOAD, and is incomplete.  Since r245223:
/* In a template, be permissive by treating an object expression
   of incomplete type as dependent (after a pedwarn).  */
we give a pedwarn and treat 'f' as dependent.  This then conflicts with this in
tsubst_copy:
    case OVERLOAD:
      /* An OVERLOAD will always be a non-dependent overload set; an
         overload set from function scope will just be represented with an
         IDENTIFIER_NODE, and from class scope with a BASELINK.  */
      gcc_assert (!uses_template_parms (t)); 
      return t;
but T is an overload with a template parameter -> crash.