Attempting to put to a readonly property should throw in strict mode, but we fail to do so for properties in static tables (e.g. values on Number, RegExp constructors). and static values in symbol tables of the variable objects (e.g. the global object's "undefined" property).
Created attachment 120560 [details] Fix
Attachment 120560 [details] did not pass style-queue: Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'LayoutTests/ChangeLog', u'LayoutTests/fast..." exit_code: 1 Source/JavaScriptCore/ChangeLog:9: Need whitespace between colon and description [changelog/filechangedescriptionwhitespace] [5] Source/JavaScriptCore/ChangeLog:10: Need whitespace between colon and description [changelog/filechangedescriptionwhitespace] [5] Source/JavaScriptCore/ChangeLog:11: Need whitespace between colon and description [changelog/filechangedescriptionwhitespace] [5] Total errors found: 3 in 14 files If any of these errors are false positives, please file a bug against check-webkit-style.
Fixed in r103697