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barraclough@apple.com authored
Reviewed by Geoff Garen. The sum of the length of substrings could overflow. * runtime/UString.h: (JSC::sumWithOverflow): (JSC::tryMakeString): git-svn-id: http://svn.webkit.org/repository/webkit/trunk@54788 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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