[njs] Fixed "global" property handler when deleting.

[noreply at nginx.com]

details:   https://github.com/nginx/njs/commit/89aca305c471a17fa5bd83a94f091a9bdde7c6a3
branches:  master
commit:    89aca305c471a17fa5bd83a94f091a9bdde7c6a3
user:      Dmitry Volyntsev <xeioex at nginx.com>
date:      Wed, 26 Jun 2024 19:12:38 -0700
description:
Fixed "global" property handler when deleting.

This fixes #734 issue.

---
 src/njs_builtin.c        | 7 ++++---
 src/test/njs_unit_test.c | 3 +++
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/njs_builtin.c b/src/njs_builtin.c
index 6c38cbee..3ff6f547 100644
--- a/src/njs_builtin.c
+++ b/src/njs_builtin.c
@@ -783,13 +783,14 @@ njs_global_this_object(njs_vm_t *vm, njs_object_prop_t *self,
     njs_object_prop_t   *prop;
     njs_lvlhsh_query_t  lhq;
 
+    if (retval == NULL) {
+        return NJS_DECLINED;
+    }
+
     njs_value_assign(retval, global);
 
     if (njs_slow_path(setval != NULL)) {
         njs_value_assign(retval, setval);
-
-    } else if (njs_slow_path(retval == NULL)) {
-        return NJS_DECLINED;
     }
 
     prop = njs_object_prop_alloc(vm, &self->name, retval, 1);
diff --git a/src/test/njs_unit_test.c b/src/test/njs_unit_test.c
index e63b0336..96c922bc 100644
--- a/src/test/njs_unit_test.c
+++ b/src/test/njs_unit_test.c
@@ -12885,6 +12885,9 @@ static njs_unit_test_t  njs_test[] =
     { njs_str("var ex; try {({}) instanceof this} catch (e) {ex = e}; ex"),
       njs_str("TypeError: right argument is not callable") },
 
+    { njs_str("delete global.global; global"),
+      njs_str("ReferenceError: \"global\" is not defined") },
+
     { njs_str("njs"),
       njs_str("[object njs]") },