Archive recovery crashes on win32 in HEAD - hot standby related?

I was going to test the walreceiver stuff, but it turns out that basic
archive recovery appears to be broken in HEAD. From what I can tell,
it's related to Hot Standby code.
I get this (this is all on win32 - I got the same on win64, but moved
back to win32 to make sure it's not an issue with the win64 code)

LOG: restored log file "000000010000000000000001" from archive
LOG: automatic recovery in progress
LOG: initializing recovery connections
LOG: redo starts at 0/1000020
LOG: consistent recovery state reached at 0/1000050
LOG: startup process (PID 1348) was terminated by exception 0xC0000005
HINT: See C include file "ntstatus.h" for a description of the
hexadecimal value.
LOG: terminating any other active server processes

Stacktrace:
postgres!hash_seq_init(struct HASH_SEQ_STATUS * status = 0x00002d66,
struct HTAB * hashp = 0x00000001)+0x13
postgres!KnownAssignedXidsRemoveMany(unsigned int xid = 0, char
keepPreparedXacts = 1 '')+0x73
postgres!ProcArrayApplyRecoveryInfo(struct RunningTransactionsData *
running = 0x00002d66)+0x1a
postgres!standby_redo(struct XLogRecPtr lsn = struct XLogRecPtr,
struct XLogRecord * record = 0x00000000)+0x80
postgres!StartupXLOG(void)+0xcda
postgres!StartupProcessMain(void)+0x91
postgres!AuxiliaryProcessMain(int argc = <Memory access error>, char
** argv = <Memory access error>)+0x435
postgres!SubPostmasterMain(int argc = 3614962, char ** argv = 0x003728fd)+0x2b2
postgres!main(int argc = <Memory access error>, char ** argv = <Memory
access error>)+0x168
postgres!__tmainCRTStartup(void)+0x10f
WARNING: Stack unwind information not available. Following frames may be wrong.
KERNEL32!BaseProcessInitPostImport+0x8d

very trivial install - one master with zero activity, archiving with
plain "copy" commands...

Not knowing that code very well at this time, but is this perhaps a
structure not being properly initialized in EXEC_BACKEND case?

--
Magnus Hagander
Me: http://www.hagander.net/
Work: http://www.redpill-linpro.com/