Gоt `Fatal Python error: Cannot recover from stack overflow.` on Windows 10, not tested on other os. Crashed when use undefined variable.

I think I have seen this bug reported elsewhere but can't find it now.

A simple reproducer : 

def foo():
    try:
        raise Exception()
    except:
        foo()
foo()

Running under gdb on Ubuntu : 

Program received signal SIGABRT, Aborted.
0x00007ffff7115428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
54	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.

> I think I have seen this bug reported elsewhere but can't find it now.

Sorry, I was referring to issue6028 and issue32570 that I thought were similar to the original report.

How did you make a recursive generator? The 'yield' would have paused execution. Do you have code you can share to reproduce? Otherwise blowing your stack out is normal behaviour in a function which you can deal with by lowering your stack depth with sys.setrecursionlimit() to one that will raise RecursionError before you blow your stack.

Brett, the user had an invalid email address in their profile thus adding comments to the issue caused a server error while sending notification to them. So they have been removed from the issue. Please see : https://python.zulipchat.com/#narrow/stream/116501-workflow/subject/Is.20adding.20comment.20in.20bpo.20broken.20for.20anyone.3F/near/148846056

As for the issue OP attached a reproducer where they produce NameError with the "new" variable which is not defined in the try block and catch the exception to make recursive calls in https://bugs.python.org/file47958/crash.py

I'm closing this as a duplicate of https://bugs.python.org/issue6028

Making a recursive call in an except block cannot be handled sensibly by the interpreter. 

On exceeding the stack depth, the interpreter will raise a RecursionError.
Catching a RecursionError and then making a call will blow the stack, leaving the interpreter with no choice; it has to abort.