Fix double map dereference indexing

src/llvm_backend_expr.cpp

@@ -3460,7 +3460,8 @@ lbAddr lb_build_addr(lbProcedure *p, Ast *expr) {
 		GB_ASSERT_MSG(is_type_indexable(t), "%s %s", type_to_string(t), expr_to_string(expr));
 
 		if (is_type_map(t)) {
-			lbValue map_val = lb_build_addr_ptr(p, ie->expr);
+			lbAddr map_addr = lb_build_addr(p, ie->expr);
+			lbValue map_val = lb_addr_load(p, map_addr);
 			if (deref) {
 				map_val = lb_emit_load(p, map_val);
 			}
@@ -3469,7 +3470,8 @@ lbAddr lb_build_addr(lbProcedure *p, Ast *expr) {
 			key = lb_emit_conv(p, key, t->Map.key);
 
 			Type *result_type = type_of_expr(expr);
-			return lb_addr_map(map_val, key, t, result_type);
+			lbValue map_ptr = lb_address_from_load_or_generate_local(p, map_val);
+			return lb_addr_map(map_ptr, key, t, result_type);
 		}
 
 		switch (t->kind) {

src/llvm_backend_general.cpp

@@ -271,6 +271,10 @@ lbAddr lb_addr(lbValue addr) {
 
 
 lbAddr lb_addr_map(lbValue addr, lbValue map_key, Type *map_type, Type *map_result) {
+	GB_ASSERT(is_type_pointer(addr.type));
+	Type *mt = type_deref(addr.type);
+	GB_ASSERT(is_type_map(mt));
+
 	lbAddr v = {lbAddr_Map, addr};
 	v.map.key    = map_key;
 	v.map.type   = map_type;