When checking to see if we have a function declaration has a conflict due to
promotations, there is no test to see if the type was an error mark and then
calls
c_type_promotes_to. c_type_promotes_to is not ready for error_mark and causes an
ICE.
This adds a check for error before the call of c_type_promotes_to.
OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.
PR c/101364
gcc/c/ChangeLog:
* c-decl.cc (diagnose_arglist_conflict): Test for
error mark before calling of c_type_promotes_to.
gcc/testsuite/ChangeLog:
* gcc.dg/pr101364-1.c: New test.
---
gcc/c/c-decl.cc | 3 ++-
gcc/testsuite/gcc.dg/pr101364-1.c | 8 ++++++++
2 files changed, 10 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.dg/pr101364-1.c
diff --git a/gcc/c/c-decl.cc b/gcc/c/c-decl.cc
index 5822faf01b4..eb2df08c0a7 100644
--- a/gcc/c/c-decl.cc
+++ b/gcc/c/c-decl.cc
@@ -1899,7 +1899,8 @@ diagnose_arglist_conflict (tree newdecl, tree olddecl,
break;
}
- if (c_type_promotes_to (type) != type)
+ if (!error_operand_p (type)
+ && c_type_promotes_to (type) != type)
{
inform (input_location, "an argument type that has a default "
"promotion cannot match an empty parameter name list "
diff --git a/gcc/testsuite/gcc.dg/pr101364-1.c
b/gcc/testsuite/gcc.dg/pr101364-1.c
new file mode 100644
index 00000000000..e7c94a05553
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr101364-1.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-std=c90 "} */
+
+void fruit(); /* { dg-message "previous declaration" } */
+void fruit( /* { dg-error "conflicting types for" } */
+ int b[x], /* { dg-error "undeclared " } */
+ short c)
+{} /* { dg-message "an argument type that has a" } */
--
2.39.3
