Merge pull request #3675 from 9rnsr/fix12937

Issue 12937 - ICE with void static array initializing

src/optimize.c

@@ -528,9 +528,13 @@ Expression *Expression_optimize(Expression *e, int result, bool keepLvalue)
 
             if ((e->e1->op == TOKstring || e->e1->op == TOKarrayliteral) &&
                 (e->type->ty == Tpointer || e->type->ty == Tarray) &&
-                e->e1->type->toBasetype()->nextOf()->size() == e->type->nextOf()->size()
-               )
+                e->e1->type->toBasetype()->nextOf()->size() == e->type->nextOf()->size())
             {
+                // Bugzilla 12937: If target type is void array, trying to paint
+                // e->e1 with that type will cause infinite recursive optimization.
+                if (e->type->nextOf()->ty == Tvoid)
+                    return;
+
                 ret = e->e1->castTo(NULL, e->type);
                 //printf(" returning1 %s\n", ret->toChars());
                 return;

test/runnable/xtest46.d

@@ -6914,6 +6914,15 @@ void test12498()
     string x = t;
 }
 
+/***************************************************/
+// 12937
+
+void test12937()
+{
+    void[1] sa2 = cast(void[])[cast(ubyte)1];   // ICE!
+    assert((cast(ubyte[])sa2[])[0] == 1);
+}
+
 /***************************************************/
 
 int main()
@@ -7200,6 +7209,7 @@ int main()
     test11181();
     test11317();
     test12153();
+    test12937();
 
     printf("Success\n");
     return 0;