I constantly get this on Solaris 2.6, purify, gcc 2.7.2.3, etc. Current build/pulls. Happens during startup. **** Purify instrumented ./apprunner.pure (pid 27193) **** UMR: Uninitialized memory read (3 times): * This is occurring while in: nsInputStream::get() [nsFileStream.cpp:47] nsHistoryDataSource::ReadOneHistoryFile(nsInputFileStream&,nsFileSpec) [nsHistoryDataSource.cpp:635] nsHistoryDataSource::ReadHistory() [nsHistoryDataSource.cpp:616] nsHistoryDataSource::Init(const char*) [nsHistoryDataSource.cpp:471] ServiceImpl::GetDataSource(const char*,nsIRDFDataSource**) [nsRDFService.cpp:857] nsGlobalHistory::Init() [nsGlobalHistory.cpp:101] nsAppShellService::Initialize() [nsAppShellService.cpp:167] main [nsAppRunner.cpp:234] _start [crt1.o] * Reading 1 byte from 0xefffefdf on the stack. * Address 0xefffefdf is local variable "c" in function nsInputStream::get().

Set target milestone to M4 and changed priority to P2.

The only way I can understand this is that it occurs when the eof is reached, and the read operation did nothing to the buffer. Accepting

Fix checked in.

Not getting this any longer. Thanks.

Bulk moving to XPCOM, in preparation for removal of XP File Handling component. (XPFH has received two bugs in ~5 months, and is no longer in active use.)