Non-UTF-8 code - Traceback not pointing to line with error

[excubo-jg]

Steps to Reproduce

1. Create .py file:
   from torch.utils.tensorboard import SummaryWriter

random_seed = 1 # ç

2. "Open in Terminal" and execute file gives this error message:
   SyntaxError: Non-UTF-8 code starting with '\xe7' in file C:\Users\Admin\source\repos\PythonTestApplication1\PythonApplication1\PythonApplication1.py on line 4, but no encoding declared; see https://python.org/dev/peps/pep-0263/ for details

3. "Start" debugger in VS creates these error messages which do point to Anaconda but not to the cause of the problem:

Traceback (most recent call last):
  File "_pydevd_bundle/pydevd_cython.pyx", line 532, in _pydevd_bundle.pydevd_cython.PyDBFrame._handle_exception
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\linecache.py", line 30, in getline
    lines = getlines(filename, module_globals)
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\linecache.py", line 46, in getlines
    return updatecache(filename, module_globals)
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\linecache.py", line 137, in updatecache
    lines = fp.readlines()
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\codecs.py", line 322, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe7 in position 71: invalid continuation byte

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "c:\program files\microsoft visual studio\2022\preview\common7\ide\extensions\microsoft\python\core\debugpy\__main__.py", line 45, in <module>
    cli.main()
  File "c:\program files\microsoft visual studio\2022\preview\common7\ide\extensions\microsoft\python\core\debugpy/..\debugpy\server\cli.py", line 444, in main
    run()
  File "c:\program files\microsoft visual studio\2022\preview\common7\ide\extensions\microsoft\python\core\debugpy/..\debugpy\server\cli.py", line 285, in run_file
    runpy.run_path(target_as_str, run_name=compat.force_str("__main__"))
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\runpy.py", line 268, in run_path
    return _run_module_code(code, init_globals, run_name,
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\runpy.py", line 97, in _run_module_code
    _run_code(code, mod_globals, init_globals,
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\Admin\source\repos\PythonTestApplication1\PythonApplication1\PythonApplication1.py", line 1, in <module>
  File "_pydevd_bundle/pydevd_cython.pyx", line 1366, in _pydevd_bundle.pydevd_cython.SafeCallWrapper.__call__
  File "_pydevd_bundle/pydevd_cython.pyx", line 662, in _pydevd_bundle.pydevd_cython.PyDBFrame.trace_dispatch
  File "_pydevd_bundle/pydevd_cython.pyx", line 836, in _pydevd_bundle.pydevd_cython.PyDBFrame.trace_dispatch
  File "_pydevd_bundle/pydevd_cython.pyx", line 452, in _pydevd_bundle.pydevd_cython.PyDBFrame.handle_user_exception
  File "_pydevd_bundle/pydevd_cython.pyx", line 535, in _pydevd_bundle.pydevd_cython.PyDBFrame._handle_exception
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\linecache.py", line 30, in getline
    lines = getlines(filename, module_globals)
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\linecache.py", line 46, in getlines
    return updatecache(filename, module_globals)
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\linecache.py", line 137, in updatecache
    lines = fp.readlines()
  File "C:\Users\Admin\anaconda3\envs\dominion\lib\codecs.py", line 322, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe7 in position 71: invalid continuation byte
The thread 'MainThread' (0x1) has exited with code 0 (0x0).
The program 'python.exe' has exited with code 1 (0x1).

Expected behavior
Same error message as if executed from Terminal

Configuration information (If you are providing a diagnostics file (see below), skip this section)
VS Version: Version 17.3.0 Preview 2.0
PTVS version: 17.0.22147.1
Python version: Python 3.10.4 (tags/v3.10.4:9d38120, Mar 23 2022, 23:13:41) [MSC v.1929 64 bit (AMD64)] on win32

[int19h]

@fabioz Looks like the code path that uses linecache to retrieve source needs to handle this exception.