Why Steam fails

Ivan Gyurdiev ivg2 at cornell.edu
Sat Dec 3 05:26:37 CST 2005

Here is why I think Steam fails on my machine:

The issue: Half of the time Steam fails to start, with this helpful 
message, and no wine output:
memstd.cpp (148) : Assertion Failed: 0
Then it goes into the minidump and writes a 3G file on my disk or so 
that I need to erase..

It seems like it tries to reserve 200 MB of memory via VirtualAlloc,
and then subsequently commit a small portion of that (again through 
Then it fails some sort of assertion.

It doesn't seem to check the retval of the first alloc, which fails 
about half of the time in
wine_anon_mmap (mmap() call) with ENOMEM. If the allocation succeeds, 
Steam proceeds to run.
If it fails, Steam dies with the message above.

This is a machine with 1G memory. How much memory does one need to run 
Isn't this supposed to be a Virtual allocation...Why does it work one 
time, and not the other...
The manpage for mmap() says ENOMEM can occur if the process exceeds its 
allowed number of mappings.
Is this relevant?

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