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C++ PATCH for c++/47703 (ICE on overload failure involving function pointer conversion)
- From: Jason Merrill <jason at redhat dot com>
- To: gcc-patches List <gcc-patches at gcc dot gnu dot org>
- Date: Sun, 20 Feb 2011 18:16:38 -0500
- Subject: C++ PATCH for c++/47703 (ICE on overload failure involving function pointer conversion)
This bug was reported in the context of C++0x lambdas, but affects any
class with a conversion to function pointer. We were trying to get the
source position of the pointer type and crashing.
Tested x86_64-pc-linux-gnu, applied to trunk.
commit 1686cec0169c6d65a0838a6c60b6e2765b4ce67c
Author: Jason Merrill <jason@redhat.com>
Date: Sun Feb 20 17:33:23 2011 -0500
PR c++/47703
* error.c (location_of): Handle non-tagged types.
diff --git a/gcc/cp/error.c b/gcc/cp/error.c
index 3e91115..28305d2 100644
--- a/gcc/cp/error.c
+++ b/gcc/cp/error.c
@@ -2493,7 +2493,11 @@ location_of (tree t)
if (TREE_CODE (t) == PARM_DECL && DECL_CONTEXT (t))
t = DECL_CONTEXT (t);
else if (TYPE_P (t))
- t = TYPE_MAIN_DECL (t);
+ {
+ t = TYPE_MAIN_DECL (t);
+ if (t == NULL_TREE)
+ return input_location;
+ }
else if (TREE_CODE (t) == OVERLOAD)
t = OVL_FUNCTION (t);
diff --git a/gcc/testsuite/g++.dg/overload/conv-op1.C b/gcc/testsuite/g++.dg/overload/conv-op1.C
new file mode 100644
index 0000000..6a63cba
--- /dev/null
+++ b/gcc/testsuite/g++.dg/overload/conv-op1.C
@@ -0,0 +1,17 @@
+// PR c++/47703
+
+typedef void (*pfn)(int &);
+
+struct A
+{
+ operator pfn() { return 0; }
+};
+
+void f()
+{
+ const int i = 42;
+ A()(i); // { dg-message "<conversion>" }
+}
+
+// { dg-prune-output "no match" }
+// { dg-prune-output "candidate" }