Index: cp/init.c
===================================================================
--- cp/init.c	(revision 193775)
+++ cp/init.c	(working copy)
@@ -3283,8 +3283,7 @@ build_vec_init (tree base, tree maxindex, tree ini
   if (TREE_CODE (atype) == ARRAY_TYPE && TYPE_DOMAIN (atype))
     maxindex = array_type_nelts (atype);
 
-  if (maxindex == NULL_TREE || maxindex == error_mark_node
-      || integer_all_onesp (maxindex))
+  if (maxindex == NULL_TREE || maxindex == error_mark_node)
     return error_mark_node;
 
   if (explicit_value_init_p)
Index: testsuite/g++.dg/init/new41.C
===================================================================
--- testsuite/g++.dg/init/new41.C	(revision 0)
+++ testsuite/g++.dg/init/new41.C	(working copy)
@@ -0,0 +1,22 @@
+// PR c++/55446
+// { dg-do run }
+
+struct S
+{
+  S() { }
+};
+
+int n = 1;
+
+void* operator new[](__SIZE_TYPE__)
+{
+  n = -1;
+  return &n;
+}
+
+int main()
+{
+  new S[0];
+  if (n != -1)
+    __builtin_abort();
+}