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StringMap suffered from the same bug as DenseMap: when you explicitly construct it with a small number of buckets, you can arrange for the tombstone-based growth path to be followed when the number of buckets was less than '8'. In that case, even with a full map, it would compare '0' as not less than '0', and refuse to grow the table, leading to inf-loops trying to find an empty bucket on the next insertion. The fix is very simple: use '<=' as the comparison. The same fix was applied to DenseMap as well during its recent refactoring. Thanks to Alex Bolz for the great report and test case. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158725 91177308-0d34-0410-b5e6-96231b3b80d8
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