Bitcoin-Qt 0.9.0 RC2 hangs after entering a series of console commands #3780

I just downloaded and installed Bitcoin-Qt 0.9-RC2 for Windows. No output is displayed for commands entered in the debug console. The entered command is displayed but no results.

11:30:26 dummy
11:30:28 asdfasdsadfsafasfd
11:33:17 getinfo

Edit: Further information

I noticed that the block count also stopped updating. No error message in the log. When I attempted to exit Bitcoin-Qt, the little window saying it is shutting down was displayed but never went away. Sounds like something got hung up. Not sure what you need to debug this. I'm running on Windows 7 using the binaries posted by Gavin.

2014-03-02 16:22:29 UpdateTip: new     best=00000000000000011ca2c9d7abfce5a1ebfe8edf5a2d219fd3b2bb1e722bc216  height=288606  log2_work=76.987244  tx=33977720  date=2014-03-02 15:52:07 progress=0.999867
2014-03-02 16:22:29 ProcessBlock: ACCEPTED
2014-03-02 16:22:52 UpdateTip: new best=0000000000000000bd8a62038b16ed50046942e3142384d3f9100b89016e5754  height=288607  log2_work=76.987402  tx=33978467  date=2014-03-02 15:59:32 progress=0.999898
2014-03-02 16:22:53 ProcessBlock: ACCEPTED
2014-03-02 16:23:17 UpdateTip: new best=00000000000000010de743b3f0cb914d4c16963e8e52aade28c26b8d74217c8f  height=288608  log2_work=76.98756  tx=33979199  date=2014-03-02 16:16:48 progress=0.999972
2014-03-02 16:23:18 ProcessBlock: ACCEPTED
2014-03-02 16:23:29 UpdateTip: new best=000000000000000043f1cd822191e0546a7ffe6ab2588a6394a44a9a031ed0a8  height=288609  log2_work=76.987718  tx=33979355  date=2014-03-02 16:19:08 progress=0.999981
2014-03-02 16:23:29 ProcessBlock: ACCEPTED
2014-03-02 16:23:34 UpdateTip: new best=0000000000000000b99e67473e8dd819f272e9aa8fa55b0a9be19dba71868c39  height=288610  log2_work=76.987876  tx=33979490  date=2014-03-02 16:24:03 progress=1.000002
2014-03-02 16:23:34 ProcessBlock: ACCEPTED

Brought Bitcoin-Qt back up and let it synch with the network. No problem. So I started importing my private keys (I started with a clean wallet). After about 5 importprivkey commands, I noticed that Bitcoin-Qt was no longer responsive. Same symptoms as above. I think the problem is related to RPC commands in general since I also saw a hang with bitcoind when I was just issuing getblockcount commands.

This appears to be just a problem with importprivkey rescanning the block chain. I guess if I wait long enough it will finish (been 20 minutes so far for a single importprivkey). Anyways, I found out that you can tell importprivkey not to rescan, so I'll do that and then do a single rescan after all of the keys have been entered.