From 72e46b3c7ad5e3d2c69868a510c00707c356106a Mon Sep 17 00:00:00 2001
From: Jason Merrill <jason@redhat.com>
Date: Mon, 23 Jan 2023 15:03:47 -0500
Subject: [PATCH] c++: vector of class with bool ctor [PR108195]

The transformation done by r13-4564 to use the iterator constructor instead
of the initializer-list constructor breaks if the iterator pointers are
themselves treated as elements of an initializer-list, so check for that.

	PR c++/108195

gcc/cp/ChangeLog:

	* call.cc (build_user_type_conversion_1): Check whether the
	iterators also find a list ctor.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/initlist-vect2.C: New test.
---
 gcc/cp/call.cc                              |  2 +-
 gcc/testsuite/g++.dg/cpp0x/initlist-vect2.C | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/g++.dg/cpp0x/initlist-vect2.C

diff --git a/gcc/cp/call.cc b/gcc/cp/call.cc
index a7de0e8..5715a7c 100644
--- a/gcc/cp/call.cc
+++ b/gcc/cp/call.cc
@@ -4581,7 +4581,7 @@ build_user_type_conversion_1 (tree totype, tree expr, int flags,
   if (tree iters = maybe_init_list_as_range (cand->fn, expr))
     if (z_candidate *cand2
 	= build_user_type_conversion_1 (totype, iters, flags, tf_none))
-      if (cand2->viable == 1)
+      if (cand2->viable == 1 && !is_list_ctor (cand2->fn))
 	{
 	  cand = cand2;
 	  expr = iters;
diff --git a/gcc/testsuite/g++.dg/cpp0x/initlist-vect2.C b/gcc/testsuite/g++.dg/cpp0x/initlist-vect2.C
new file mode 100644
index 0000000..eec7d34
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/initlist-vect2.C
@@ -0,0 +1,16 @@
+// PR c++/108195
+// { dg-do run { target c++11 } }
+
+#include <vector>
+
+struct S
+{
+  S(bool) {}
+};
+
+int main()
+{
+  std::vector<S> v = { true, false, true };
+  if (v.size() != 3)
+    __builtin_abort ();
+}
-- 
2.7.4