[Python-Dev] cygwin errors

[Skip Montanaro]

I made a little progress narrowing down the cygwin errors.  If I simply run

    ./python.exe Lib/test/regrtest.py

the first test which fails is test_bz2.  If I run test_bz2 by itself it
succeeds.  I created a shell script which just executed pairs of tests, one
of the ones which was run before test_bz2 followed by test_bz2.  A couple
tests caused test_bz2 to fail:

    test___all__
    test_asynchat

Here's the error output:

    C:\cygwin\home\Administrator\src\python\dist\src\python.exe: *** unable to remap
     C:\cygwin\bin\cygssl-0.9.7.dll to same address as parent(0x11B0000) != 0x11C0000
         44 [main] python 1476 sync_with_child: child 1532(0x18C) died before initialization with status code 0x1
        184 [main] python 1476 sync_with_child: *** child state child loading dlls
    C:\cygwin\home\Administrator\src\python\dist\src\python.exe: *** unable to remap
     C:\cygwin\bin\cygssl-0.9.7.dll to same address as parent(0x11B0000) != 0x11C0000
      61438 [main] python 1476 sync_with_child: child 896(0x150) died before initialization with status code 0x1
      61612 [main] python 1476 sync_with_child: *** child state child loading dlls
    C:\cygwin\home\Administrator\src\python\dist\src\python.exe: *** unable to remap
     C:\cygwin\bin\cygssl-0.9.7.dll to same address as parent(0x11B0000) != 0x11C0000
     118777 [main] python 1476 sync_with_child: child 1452(0x114) died before initialization with status code 0x1
     118944 [main] python 1476 sync_with_child: *** child state child loading dlls
    C:\cygwin\home\Administrator\src\python\dist\src\python.exe: *** unable to remap
     C:\cygwin\bin\cygssl-0.9.7.dll to same address as parent(0x11B0000) != 0x11C0000
     208810 [main] python 1476 sync_with_child: child 1664(0xDC) died before initialization with status code 0x1
     208994 [main] python 1476 sync_with_child: *** child state child loading dlls
    C:\cygwin\home\Administrator\src\python\dist\src\python.exe: *** unable to remap
     C:\cygwin\bin\cygssl-0.9.7.dll to same address as parent(0x11B0000) != 0x11C0000
     294015 [main] python 1476 sync_with_child: child 1584(0xA0) died before initialization with status code 0x1
     294200 [main] python 1476 sync_with_child: *** child state child loading dlls
    C:\cygwin\home\Administrator\src\python\dist\src\python.exe: *** unable to remap
     C:\cygwin\bin\cygssl-0.9.7.dll to same address as parent(0x11B0000) != 0x11C0000
     371845 [main] python 1476 sync_with_child: child 1600(0x68) died before initialization with status code 0x1
     372041 [main] python 1476 sync_with_child: *** child state child loading dlls
    test test_bz2 failed -- errors occurred; run in verbose mode for details
    1 test OK.
    1 test failed:
        test_bz2
    [18388 refs]

I then tried the same tactic with another crasher, test_fork1, and
discovered these possible culprits:

    test___all__
    test_asynchat
    test_cgi
    test_email

There's the test_fork1 error output:

    C:\cygwin\home\Administrator\src\python\dist\src\python.exe: *** unable to remap
     C:\cygwin\bin\cygssl-0.9.7.dll to same address as parent(0x11B0000) != 0x11C0000
         77 [main] python 1504 sync_with_child: child 1452(0x190) died before initialization with status code 0x1
        212 [main] python 1504 sync_with_child: *** child state child loading dlls
    test test_fork1 crashed -- exceptions.OSError: [Errno 11] Resource temporarily unavailable
    1 test OK.
    1 test failed:
        test_fork1
    [18201 refs]

I then went back and tried test_cgi and test_email with test_bz2 (they don't
run before test_bz2 in the normal case).  Test_bz2 failed when run after
either of them.  In all cases with both test scenarios, the first test
succeeded.

I took a quick peek at the code of the possible culprits but didn't see
anything which seemed to link them all together.

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