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Commit c815a4e2 authored by Howard Hinnant's avatar Howard Hinnant
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Bill Fisher: This patch fixes a less likely case where '\b' can back up into... 

Bill Fisher: This patch fixes a less likely case where '\b' can back up into invalid memory, when driven by a regex_iterator (for case 1, see r185273 or http://llvm.org/bugs/show_bug.cgi?id=16240)

The attached test program also supplies a test for the case 1 fix in r185273.

llvm-svn: 186089
parent e97c71b8
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