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PR c/97955 - ICE in build_array_type_1 on invalid redeclaration of function with VLA parameter

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gcc/c-family/ChangeLog:

	* c-warn.c (warn_parm_array_mismatch): Avoid invalid redeclarations.

gcc/testsuite/ChangeLog:

	* gcc.dg/pr97955.c: New test.
This commit is contained in:
Martin Sebor 2020-11-24 15:23:57 -07:00
parent f2a5cdff04
commit 211d68dda1
2 changed files with 9 additions and 2 deletions
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4
gcc/c-family/c-warn.c
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@ -3379,8 +3379,9 @@ warn_parm_array_mismatch (location_t origloc, tree fndecl, tree newparms)
return;
/* Only check pointers and C++ references. */
tree curptype = TREE_TYPE (curp);
tree newptype = TREE_TYPE (newp);
if (!POINTER_TYPE_P (newptype))
if (!POINTER_TYPE_P (curptype) || !POINTER_TYPE_P (newptype))
continue;
/* Skip mismatches in __builtin_va_list that is commonly
@ -3430,7 +3431,6 @@ warn_parm_array_mismatch (location_t origloc, tree fndecl, tree newparms)
if (origloc == UNKNOWN_LOCATION)
origloc = newloc;
tree curptype = TREE_TYPE (curp);
const std::string newparmstr = newa->array_as_string (newptype);
const std::string curparmstr = cura->array_as_string (curptype);
if (new_vla_p && !cur_vla_p)

7
gcc/testsuite/gcc.dg/pr97955.c Normal file
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@ -0,0 +1,7 @@
/* PR 97955 - ICE in build_array_type_1 on invalid redeclaration of function
with VLA parameter
{ dg-do compile }
{ dg-options "-Wall" } */
void f (int n, int a[n]);
void f (int *b) { } // { dg-error "conflicting types" }