Dangling trie nodes after full cleanup

[holiman]

System information

Commit hash : 400332b99d4eacb6aa509339fa39460b68f76ee7

Expected behaviour

Importing the attached blocks should not result in Dangling trie nodes after full cleanup
blocks.zip

The blocks are the first couple of thousand mainnet blocks.

Actual behaviour

$ build/bin/geth --datadir /tmp/bazonk import blocks.rlp
INFO [06-05|23:14:16] Maximum peer count                       ETH=25 LES=0 total=25
INFO [06-05|23:14:16] Allocated cache and file handles         database=/tmp/bazonk/geth/chaindata cache=768 handles=1024
INFO [06-05|23:14:16] Writing default main-net genesis block 
INFO [06-05|23:14:16] Persisted trie from memory database      nodes=12356 size=1.88mB time=37.3009ms gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [06-05|23:14:16] Disk storage enabled for ethash caches   dir=/tmp/bazonk/geth/ethash count=3
INFO [06-05|23:14:16] Disk storage enabled for ethash DAGs     dir=/home/user/.ethash      count=2
INFO [06-05|23:14:16] Loaded most recent local header          number=0 hash=d4e567…cb8fa3 td=17179869184
INFO [06-05|23:14:16] Loaded most recent local full block      number=0 hash=d4e567…cb8fa3 td=17179869184
INFO [06-05|23:14:16] Loaded most recent local fast block      number=0 hash=d4e567…cb8fa3 td=17179869184
INFO [06-05|23:14:16] Importing blockchain                     file=blocks.rlp
INFO [06-05|23:14:24] Imported new chain segment               blocks=1584 txs=0 mgas=0.000 elapsed=8.000s mgasps=0.000 number=1584 hash=cf0aca…2fc5b1 cache=462.80kB
INFO [06-05|23:14:25] Imported new chain segment               blocks=916  txs=0 mgas=0.000 elapsed=1.056s mgasps=0.000 number=2500 hash=dcdb0a…b6c720 cache=486.27kB
INFO [06-05|23:14:28] Imported new chain segment               blocks=956  txs=0 mgas=0.000 elapsed=2.781s mgasps=0.000 number=3456 hash=1ac895…9ccc3b cache=513.40kB
INFO [06-05|23:14:28] Writing cached state to disk             block=3456 hash=1ac895…9ccc3b root=d99598…a85e1d
INFO [06-05|23:14:28] Persisted trie from memory database      nodes=653   size=156.01kB time=3.230582ms gcnodes=19053 gcsize=7.33mB gctime=55.222814ms livenodes=709 livesize=270.22kB
INFO [06-05|23:14:28] Writing cached state to disk             block=3455 hash=fe07ab…ff7489 root=b6ae8e…67faa5
INFO [06-05|23:14:28] Persisted trie from memory database      nodes=5     size=2.02kB   time=48.341µs   gcnodes=0     gcsize=0.00B  gctime=0s          livenodes=704 livesize=268.20kB
INFO [06-05|23:14:28] Writing cached state to disk             block=3329 hash=43caf8…cac1fe root=c83626…a1fed3
INFO [06-05|23:14:28] Persisted trie from memory database      nodes=160   size=47.28kB  time=651.563µs  gcnodes=0     gcsize=0.00B  gctime=0s          livenodes=544 livesize=220.93kB
ERROR[06-05|23:14:28] Dangling trie nodes after full cleanup 
INFO [06-05|23:14:28] Blockchain manager stopped 
Import done in 11.876236127s.

Compactions
 Level |   Tables   |    Size(MB)   |    Time(sec)  |    Read(MB)   |   Write(MB)
-------+------------+---------------+---------------+---------------+---------------

Read(MB):0.00000 Write(MB):6.52393
Trie cache misses:  0
Trie cache unloads: 0

Object memory: 231.579 MB current, 343.589 MB peak
System memory: 402.530 MB current, 395.963 MB peak
Allocations:   5.432 million
GC pause:      1.963472ms

Compacting entire database...
Compaction done in 79.81669ms.

Compactions
 Level |   Tables   |    Size(MB)   |    Time(sec)  |    Read(MB)   |   Write(MB)
-------+------------+---------------+---------------+---------------+---------------
   0   |          0 |       0.00000 |       0.04368 |       0.00000 |       3.95302
   1   |          2 |       3.53918 |       0.03262 |       3.95302 |       3.53918

Read(MB):3.87999 Write(MB):14.01646
INFO [06-05|23:14:28] Database closed                          database=/tmp/bazonk/geth/chaindata