[Coin-discuss] Query: Problems with gzip'd i/o, CoinUtils, Cygwin/minGW/Win2K
lou at cs.sfu.ca
Tue Oct 17 14:46:15 EDT 2006
I'm seeing a failure of the CoinUtils unit test. The base o/s is
Windows 2000. The build is done in cygwin, but the -mnocygwin compile flag
means that (if I understand correctly) execution occurs in the minGW
The unit test failure occurs when trying to read 25fv47.mps.gz, but the
Osi unit test fails in the same manner on a different gzip'd file. (Note:
Symbolic links also fail in this environment; assume a full copy of the file
replaces the symbolic link.) Mps input fails with a `bad card image' error.
Some poking around reveals that input is ok for a while (about 100 lines) and
then becomes corrupted. The problem looks to be deep --- down in
CoinGzipFileInput or CoinGetslessFileInput, perhaps in the gz libraries.
Before I spend more time on this, I have two questions:
* Does anyone see this problem with Windows XP?
* Does anyone actually use the Cygwin/Win2K environment?
No to both questions says this bug probably isn't worth fixing, given the
relatively simple work-around (copy and unzip files before use). If the same
bug shows with XP, then it's probably worth pursuing.
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