id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
27586	Django sometimes crashes on Windows when being launched in PyCharm	Vilius Poška	nobody	"When trying to launch a Django server with (and sometimes even without) debugging on PyCharm, I get this error:

{{{
...
pydev debugger: process 10532 is connecting
Connected to pydev debugger (build 163.8233.8)
Process finished with exit code -1073741819 (0xC0000005)
}}}

That's how it looks without debugging:
{{{
""C:\Program Files (x86)\PyCharm\bin\runnerw.exe"" D:\project\env\Scripts\python.exe D:/project/manage.py runserver 80

Process finished with exit code -1073741819 (0xC0000005)
}}}

The strangest thing is that if I re-run, some of the times (1 success in about 4-6 reruns) it will launch successfully. I also couldn't reproduce this problem without PyCharm.

Specs: Windows 10 Pro, Pycharm (this happens on versions 5.x through 2016.3) x86 and x64 versions, Python 3.5x, Django 1.8-1.10.x.

This is what the Event Viewer reports about the error:

{{{
    Faulting application name: python.exe, version: 3.5.1150.1013, time stamp: 0x566391f0
    Faulting module name: ucrtbase.dll, version: 10.0.14393.0, time stamp: 0x57898db2
    Exception code: 0xc0000005
    Fault offset: 0x000b6d95
    Faulting process ID: 0x1b30
    Faulting application start time: 0x01d251286ca8ada3
    Faulting application path: D:\project\env\Scripts\python.exe
    Faulting module path: C:\WINDOWS\System32\ucrtbase.dll
    Report ID: b23376d6-cf66-4d83-8781-cd22311e0f9e
    Faulting package full name: 
    Faulting package-relative application ID: 
}}}

The error appears to originate from `restart_with_reloader` in `autoreload.py` after this statement:

{{{
    def restart_with_reloader():
        while True:
            args = [sys.executable] + ['-W%s' % o for o in sys.warnoptions] + sys.argv
            if sys.platform == ""win32"":
                args = ['""%s""' % arg for arg in args]
            new_environ = os.environ.copy()
            new_environ[""RUN_MAIN""] = 'true'

            # this line crashes the whole script
            # I guess the problem arises in native code
            exit_code = os.spawnve(os.P_WAIT, sys.executable, args, new_environ)
            # debugger disconnects here

            if exit_code != 3:
                return exit_code
}}}"	Bug	closed	Utilities	1.10	Normal	needsinfo			Unreviewed	0	0	0	0	0	0