Jacek Caban : jscript: Fix PROP_DELETED handling in delete_prop.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 26720d1c8b73cd52091b8ba942928273af95846a
URL:    https://gitlab.winehq.org/wine/wine/-/commit/26720d1c8b73cd52091b8ba94292827...

Author: Jacek Caban 
Date:   Thu Jun 27 12:58:52 2024 +0200

jscript: Fix PROP_DELETED handling in delete_prop.

---

dlls/jscript/dispex.c      |  2 +-
 dlls/jscript/tests/lang.js | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/dlls/jscript/dispex.c b/dlls/jscript/dispex.c
index 57882bf499e..493dcf7fbc9 100644
--- a/dlls/jscript/dispex.c
+++ b/dlls/jscript/dispex.c
@@ -2029,7 +2029,7 @@ static HRESULT WINAPI DispatchEx_InvokeEx(IDispatchEx *iface, DISPID id, LCID lc

static HRESULT delete_prop(dispex_prop_t *prop, BOOL *ret)
 {
-    if(prop->type == PROP_PROTREF) {
+    if(prop->type == PROP_PROTREF || prop->type == PROP_DELETED) {
         *ret = TRUE;
         return S_OK;
     }
diff --git a/dlls/jscript/tests/lang.js b/dlls/jscript/tests/lang.js
index 30d8a338fd3..2ddfc3a8341 100644
--- a/dlls/jscript/tests/lang.js
+++ b/dlls/jscript/tests/lang.js
@@ -1712,6 +1712,18 @@ try {
     }
 })();

+(function() {
+    function constr() {}
+    constr.prototype = { prop: 1 };
+    var o = new constr(), r;
+    ok(o.prop === 1, "o.prop = " + o.prop);
+    r = delete constr.prototype.prop;
+    ok(r === true, "delete returned " + r);
+    ok(o.prop === undefined, "o.prop = " + o.prop);
+    r = delete o["prop"];
+    ok(r === true, "delete returned " + r);
+})();
+
 if (false)
     if (true)
         ok(false, "if evaluated");