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Andrew Kryczka c0ec58ecb9 stop populating unused/invalid MergingIterator heaps (#8975) 
Summary:
I was looking at https://github.com/facebook/rocksdb/issues/2636 and got very confused that `MergingIterator::AddIterator()` is populating `min_heap_` with dangling pointers. There is justification in the comments that `min_heap_` will be cleared before it's used, but it'd be cleaner to not populate it with dangling pointers in the first place. Also made similar change in the constructor for consistency, although the pointers there would not be dangling, just unused.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8975

Test Plan: rely on existing tests

Reviewed By: pdillinger, hx235

Differential Revision: D31273767

Pulled By: ajkr

fbshipit-source-id: 127ca9dd1f82f77f55dd0c3f19511de3282fc229
2021-10-07 15:26:08 -07:00
..
adaptive Refactor: use TableBuilderOptions to reduce parameter lists (#8240) 2021-04-29 07:00:50 -07:00
block_based Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
cuckoo Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
plain Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
block_fetcher.cc Rename variables in ImmutableCFOptions to avoid conflicts with ImmutableDBOptions (#8227) 2021-04-26 12:43:45 -07:00
block_fetcher.h Add db_test2 to to ASSERT_STATUS_CHECKED (#8640) 2021-08-16 08:10:32 -07:00
block_fetcher_test.cc Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
cleanable_test.cc
format.cc More clear error message on uncompressing block (#8934) 2021-09-27 10:38:16 -07:00
format.h Make ImmutableOptions struct that inherits from ImmutableCFOptions and ImmutableDBOptions (#8262) 2021-05-05 14:00:17 -07:00
get_context.cc Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
get_context.h Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
internal_iterator.h
iter_heap.h
iterator.cc
iterator_wrapper.h Redesign block cache pinning API (#7520) 2020-10-11 14:58:24 -07:00
merger_test.cc Cleanup multiple implementations of VectorIterator (#8901) 2021-10-06 07:48:31 -07:00
merging_iterator.cc stop populating unused/invalid MergingIterator heaps (#8975) 2021-10-07 15:26:08 -07:00
merging_iterator.h Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
meta_blocks.cc Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
meta_blocks.h Make ImmutableOptions struct that inherits from ImmutableCFOptions and ImmutableDBOptions (#8262) 2021-05-05 14:00:17 -07:00
mock_table.cc Introduce a mechanism to dump out blocks from block cache and re-insert to secondary cache (#8912) 2021-10-07 11:42:31 -07:00
mock_table.h Fix some minor issues in the Customizable infrastructure (#8566) 2021-08-19 10:10:47 -07:00
multiget_context.h Batch blob read IO for MultiGet (#8699) 2021-09-17 19:23:13 -07:00
persistent_cache_helper.cc
persistent_cache_helper.h
persistent_cache_options.h
scoped_arena_iterator.h
sst_file_dumper.cc Make it possible to apply only a subrange of table property collectors (#8298) 2021-05-17 18:28:39 -07:00
sst_file_dumper.h Make ImmutableOptions struct that inherits from ImmutableCFOptions and ImmutableDBOptions (#8262) 2021-05-05 14:00:17 -07:00
sst_file_reader.cc Make ImmutableOptions struct that inherits from ImmutableCFOptions and ImmutableDBOptions (#8262) 2021-05-05 14:00:17 -07:00
sst_file_reader_test.cc Support timestamps in SstFileWriter (#8899) 2021-09-09 18:58:01 -07:00
sst_file_writer.cc Support timestamps in SstFileWriter (#8899) 2021-09-09 18:58:01 -07:00
sst_file_writer_collectors.h Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
table_builder.h Partially revert the "apply subrange of table property collectors" change (#8465) 2021-07-06 10:14:32 -07:00
table_factory.cc Add customizable_util.h to the public API (#8301) 2021-06-29 09:08:57 -07:00
table_properties.cc Embed original file number in SST table properties (#8686) 2021-08-20 20:40:48 -07:00
table_properties_internal.h Fix and detect headers with missing dependencies (#8893) 2021-09-10 10:00:26 -07:00
table_reader.h
table_reader_bench.cc Make it possible to apply only a subrange of table property collectors (#8298) 2021-05-17 18:28:39 -07:00
table_reader_caller.h Fix and detect headers with missing dependencies (#8893) 2021-09-10 10:00:26 -07:00
table_test.cc Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
two_level_iterator.cc Redesign block cache pinning API (#7520) 2020-10-11 14:58:24 -07:00
two_level_iterator.h