Jacek Caban : mshtml: Ignore attempts to set read only builtin properties in IE9+ mode.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a1d04f704d44229726bd72904ce765b08c4837b5
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=a1d04f704d44229726bd72904ce765b08c4837b5

Author: Jacek Caban <jacek at codeweavers.com>
Date:   Thu Nov  5 17:50:32 2020 +0100

mshtml: Ignore attempts to set read only builtin properties in IE9+ mode.

Signed-off-by: Jacek Caban <jacek at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/mshtml/dispex.c     | 4 ++++
 dlls/mshtml/tests/es5.js | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/dlls/mshtml/dispex.c b/dlls/mshtml/dispex.c
index dab44991bf5..f4cc2b76f2a 100644
--- a/dlls/mshtml/dispex.c
+++ b/dlls/mshtml/dispex.c
@@ -1101,6 +1101,10 @@ static HRESULT builtin_propput(DispatchEx *This, func_info_t *func, DISPPARAMS *
     }
 
     if(!func->put_vtbl_off) {
+        if(dispex_compat_mode(This) >= COMPAT_MODE_IE9) {
+            WARN("No setter\n");
+            return S_OK;
+        }
         FIXME("No setter\n");
         return E_FAIL;
     }
diff --git a/dlls/mshtml/tests/es5.js b/dlls/mshtml/tests/es5.js
index ded25df5128..09ea9e0d657 100644
--- a/dlls/mshtml/tests/es5.js
+++ b/dlls/mshtml/tests/es5.js
@@ -949,3 +949,8 @@ sync_test("preventExtensions", function() {
 
     ok(Object.preventExtensions.length === 1, "Object.preventExtensions.length = " + Object.preventExtensions.length);
 });
+
+sync_test("head_setter", function() {
+    document.head = "";
+    ok(typeof(document.head) === "object", "typeof(document.head) = " + typeof(document.head));
+});