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fix ASAN for DeleteFilesInRange test case 

Summary:
error message was

```
==3095==ERROR: AddressSanitizer: stack-use-after-scope on address 0x7ffd18216c40 at pc 0x0000005edda1 bp 0x7ffd18215550 sp 0x7ffd18214d00
...
Address 0x7ffd18216c40 is located in stack of thread T0 at offset 1952 in frame
     #0 internal_repo_rocksdb/db_compaction_test.cc:1520 rocksdb::DBCompactionTest_DeleteFileRangeFileEndpointsOverlapBug_Test::TestBody()
```

It was unsafe to have slices referring to the temporary string objects' buffers, as those strings were destroyed before the slices were used. Fixed it by assigning the strings returned by `Key()` to local variables.
Closes https://github.com/facebook/rocksdb/pull/3238

Differential Revision: D6507864

Pulled By: ajkr

fbshipit-source-id: dd07de1a0070c6748c1ab4f3d7bd31f9a81889d0
This commit is contained in:
Andrew Kryczka 2017-12-07 11:07:44 -08:00 committed by Facebook Github Bot
parent e1c569c324
commit 2e3a00987e
1 changed files with 2 additions and 2 deletions
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4
db/db_compaction_test.cc
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@ -1563,8 +1563,8 @@ TEST_F(DBCompactionTest, DeleteFileRangeFileEndpointsOverlapBug) {
// Verify `DeleteFilesInRange` can't drop only file 0 which would cause
// "1 -> vals[0]" to reappear.
Slice begin = Key(0);
Slice end = Key(1);
std::string begin_str = Key(0), end_str = Key(1);
Slice begin = begin_str, end = end_str;
ASSERT_OK(DeleteFilesInRange(db_, db_->DefaultColumnFamily(), &begin, &end));
ASSERT_EQ(vals[1], Get(Key(1)));