Bug 114036

Summary: JSC: Different behaviours when changing value of a readonly properties in a global object.
Product: WebKit Reporter: Stephane Cerveau <scerveau>
Component: JavaScriptCoreAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: allan.jensen, ararunprasad, arurajku, benjamin, cdumez, erights, fpizlo, ggaren, mburtin, oliver, sam
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: PC   
OS: All   
Bug Depends on:    
Bug Blocks: 88186    
Attachments:
Description Flags
sample html test
none
sample html test with log in document none

Stephane Cerveau
Reported 2013-04-05 08:29:36 PDT
Created attachment 196635 [details] sample html test Changing the value of a property's object such as width in window.screen is different in a function than in the main. ie. for( var prop in window.screen) { window.screen[prop] = 0xABADCAFE; } In the main, the property value does not change if we assigned a new value but then using this object in a function, the property has been changed. Please see attached example, index.html. The bug can be reproduced with Safari 5.1.7 but not with Chromium.
Attachments
sample html test (1.14 KB, text/html)
2013-04-05 08:29 PDT, Stephane Cerveau 		no flags
Details
sample html test with log in document (1.42 KB, text/html)
2013-04-05 08:32 PDT, Stephane Cerveau 		no flags
Details
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.
Stephane Cerveau
Comment 1 2013-04-05 08:32:31 PDT
Created attachment 196636 [details] sample html test with log in document
Arunprasad Rajkumar
Comment 2 2013-06-17 07:12:28 PDT
screen object's properties are readonly. Refer Screen.idl ! Why you are trying to change that?
Chris Dumez
Comment 3 2013-06-17 07:24:48 PDT
(In reply to comment #2) > screen object's properties are readonly. > > Refer Screen.idl ! > > Why you are trying to change that? Right, they are readonly so you shouldn't be able to change them, thus the bug :) I am however unable to reproduce with the test case given and the EFL port (also using JSC).
Arunprasad Rajkumar
Comment 4 2013-06-17 07:28:46 PDT
I tried in Qt Port, it is not changing. (If possible check the same in Slim Boat, it uses Qt WebKit)
Benjamin Poulain
Comment 5 2013-06-17 12:45:10 PDT
The test case does not return anything wrong on OS X. Closing.
Stephane Cerveau
Comment 6 2013-06-19 01:38:23 PDT
*** This bug has been marked as a duplicate of bug 113831 ***
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