Obtaining Diagnostic Output

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Wing and your debug code run in separate processes, each of which can independently be configured to collect additional diagnostic log information.

Diagnosing IDE Problems

Submit Bug Report in the Help menu is a quick way to diagnose problems seen while working with Wing. Please include a description of the problem, your email address so we can follow up, and leave the Include error log checkbox checked so we have the information needed to diagnose and fix the problem. The error log is the file ide.log in your Settings Directory .

To diagnose failure to start, or if you can't submit a bug report directly from Wing, run console_wing.exe (on Windows) or wing6.1 --verbose (on Linux and OS X) from the command line to obtain diagnostic output that you can email to support at wingware.com along with your system type and version, version of Wing, version of Python, and a description of the problem you are running into.

If Wing is crashing please provide the file segfault.log from the User Settings Directory with any bug reports.

Diagnosing Debugger Problems

To diagnose debugger problems, set the Debugger > Diagnostics > Debug Internals Log File preference to the full path of a file that the debugger will be able to create. Then try debugging again.

If the file does not appear, instead set the Debugger > Diagnostics > Debug Internals Log File preference to Log to sys.stderr and enable the Debugger > I/O > Use External Console and Debugger > I/O > External Console Waits on Exit preferences. When you try again, Wing should display a debug console with diagnostics.

If you are using wingdbstub to start debug, instead set WINGDB_LOGFILE environment variable to <stderr> (or alter kLogFile inside wingdbstub.py), and try launching the following script from the command line:

import wingdbstub
print("test1")
x = not_defined
print("test2")

Never check the Extremely Verbose Internal Log preference unless Wingware Technical Support asks you to. When this is enabled, it will drastically slow down the debugger.

Debugger diagnostic logs can be emailed to support at wingware.com together with the file ide.log in your User Settings Directory , your system version, version of Wing, version of Python, and a description of the problem you are seeing.

You will want to turn off diagnostic logging again after submitting your report since it slows down debugging considerably.

Diagnosing Debug Process Crashing

If your debug process is crashing entirely while Wing is interacting with it, it may be that Wing is exercising buggy code when it inspects data in the debug process. In this case, it can be useful to capture the Python stack at the moment of the crash. You can do this by installing faulthandler into the Python that runs your debug process, and then adding the following to code that is executed before the crash:

import faulthandler
faulthandler.enable()

After that is done, the Python stack for each thread is written to stderr if the process crashes.

If you can't access output sent to stderr, you can send the stack to a file instead, as follows:

import faulthandler
segfault_fn = '/path/to/segfault.log'  # Change this to a valid path
f = open(segfault_fn, 'a')
faulthandler.enable(f)
# IMPORTANT: Leave f open!!!

It is very important that you leave the file f open for the life of the process. Otherwise faulthandler may corrupt another file opened later under the same file descriptor, by writing the stack there instead. This is a design limitation imposed by the nature of post-segfault processing.

Please send details of debugger crashes, including the Python stacks obtained by this method, to support@wingware.com. We will try to change Wing's data inspection to avoid the crash that you are seeing, and we may be able to offer a work-around.

See also Problems Handling Values.