When constructing the builtin operator->* candidate set according to
the available conversion functions for each operand type, we end up
considering a candidate with C1=T (a TEMPLATE_TYPE_PARM) and C2=F,
during which we crash from lookup_base because dependent_type_p sees
a TEMPLATE_TYPE_PARM when processing_template_decl is cleared.
Sidestepping the question of whether we should be considering a
dependent conversion function here in the first place (which I'm not
sure about), it seems futile to check DERIVED_FROM_P for anything other
than an actual class type, so this patch fixes this ICE by guarding
the DERIVED_FROM_P test with CLASS_TYPE_P instead of MAYBE_CLASS_TYPE_P.
Bootstrapped and regtested on x86_64-pc-linux-gnu, does this look OK for
trunk and perhaps the release branches?
PR c++/103455
gcc/cp/ChangeLog:
* call.cc (add_builtin_candidate) <case MEMBER_REF>: Check
CLASS_TYPE_P instead of MAYBE_CLASS_TYPE_P.
gcc/testsuite/ChangeLog:
* g++.dg/overload/builtin6.C: New test.
---
gcc/cp/call.cc | 2 +-
gcc/testsuite/g++.dg/overload/builtin6.C | 14 ++++++++++++++
2 files changed, 15 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/g++.dg/overload/builtin6.C
diff --git a/gcc/cp/call.cc b/gcc/cp/call.cc
index ec6c5d5baa2..dfe370d685d 100644
--- a/gcc/cp/call.cc
+++ b/gcc/cp/call.cc
@@ -2821,7 +2821,7 @@ add_builtin_candidate (struct z_candidate **candidates,
enum tree_code code,
tree c1 = TREE_TYPE (type1);
tree c2 = TYPE_PTRMEM_CLASS_TYPE (type2);
- if (MAYBE_CLASS_TYPE_P (c1) && DERIVED_FROM_P (c2, c1)
+ if (CLASS_TYPE_P (c1) && DERIVED_FROM_P (c2, c1)
&& (TYPE_PTRMEMFUNC_P (type2)
|| is_complete (TYPE_PTRMEM_POINTED_TO_TYPE (type2))))
break;
diff --git a/gcc/testsuite/g++.dg/overload/builtin6.C
b/gcc/testsuite/g++.dg/overload/builtin6.C
new file mode 100644
index 00000000000..25e45040094
--- /dev/null
+++ b/gcc/testsuite/g++.dg/overload/builtin6.C
@@ -0,0 +1,14 @@
+// PR c++/103455
+
+struct A { };
+
+struct B {
+ operator A*() const;
+ template<class T> operator T*() const;
+};
+
+typedef void (A::*F)();
+
+void foo(B b, F f) {
+ (b->*f)();
+}
--
2.35.1.655.ga68dfadae5
