fix crash with generic function and implicit cast

src/ast_render.cpp

@@ -326,9 +326,9 @@ static void render_node(AstRender *ar, AstNode *node) {
                 AstNode *statement = node->data.block.statements.at(i);
                 print_indent(ar);
                 render_node(ar, statement);
+                fprintf(ar->f, ";\n");
             }
             ar->indent -= ar->indent_size;
-            fprintf(ar->f, "\n");
             print_indent(ar);
             fprintf(ar->f, "}");
             break;
@@ -438,7 +438,11 @@ static void render_node(AstRender *ar, AstNode *node) {
             fprintf(ar->f, ")");
             break;
         case NodeTypeArrayAccessExpr:
-            zig_panic("TODO");
+            render_node(ar, node->data.array_access_expr.array_ref_expr);
+            fprintf(ar->f, "[");
+            render_node(ar, node->data.array_access_expr.subscript);
+            fprintf(ar->f, "]");
+            break;
         case NodeTypeSliceExpr:
             zig_panic("TODO");
         case NodeTypeFieldAccessExpr:

src/parser.cpp

@@ -2927,6 +2927,7 @@ static void clone_subtree_list(ZigList<AstNode *> *dest, ZigList<AstNode *> *src
     dest->resize(src->length);
     for (int i = 0; i < src->length; i += 1) {
         dest->at(i) = ast_clone_subtree(src->at(i), next_node_index);
+        dest->at(i)->parent_field = &dest->at(i);
     }
 }
 
@@ -2958,11 +2959,12 @@ AstNode *ast_clone_subtree(AstNode *old_node, uint32_t *next_node_index) {
     memcpy(new_node, old_node, sizeof(AstNode));
     new_node->create_index = *next_node_index;
     *next_node_index += 1;
+    new_node->parent_field = nullptr;
 
     switch (new_node->type) {
         case NodeTypeRoot:
-            clone_subtree_list(&new_node->data.root.top_level_decls, &old_node->data.root.top_level_decls,
-                    next_node_index);
+            clone_subtree_list(&new_node->data.root.top_level_decls,
+                               &old_node->data.root.top_level_decls, next_node_index);
             break;
         case NodeTypeFnProto:
             clone_subtree_tld(&new_node->data.fn_proto.top_level_decl, &old_node->data.fn_proto.top_level_decl,

test/run_tests.cpp

@@ -1667,7 +1667,7 @@ extern void (*fn_ptr)(void);
     )SOURCE", 2,
             "pub extern var fn_ptr: ?extern fn();",
             R"SOURCE(pub inline fn foo() {
-    (??fn_ptr)()
+    (??fn_ptr)();
 })SOURCE");
 
 

test/self_hosted.zig

@@ -975,3 +975,14 @@ pub fn vec3(x: f32, y: f32, z: f32) -> Vec3 {
         .data = []f32 { x, y, z, },
     }
 }
+
+
+#attribute("test")
+fn generic_fn_with_implicit_cast() {
+    assert(get_first_byte(u8)([]u8 {13}) == 13);
+    assert(get_first_byte(u16)([]u16 {0, 13}) == 0);
+}
+fn get_byte(ptr: ?&u8) -> u8 {*??ptr}
+fn get_first_byte(T: type)(mem: []T) -> u8 {
+    get_byte((&u8)(&mem[0]))
+}