Bug report

Bug description:

In we enter this in the new interactive interpreter in Python 3.13

raise SyntaxError('hello', 'abcdef')

the interpreter window closes without any error message.

This happens because the second argument of SyntaxError is interpreted as an iterator that produces (filename, lineno, offset, text, end_lineno, end_offset). The constructor doesn't control if offset is an integer; in the example above it is set to the character 'c'.

When an exception is caught by the REPL it is handled by the traceback module. This line

There are 2 solutions to this issue:

• add more controls on the second argument to SyntaxError to make sure that the types are those expected (str for filename, int for lineno, etc.)
• test the type of SyntaxError instances arguments in traceback.py

This issue doesn't happen with previous versions of the REPL

Python 3.12.0 (tags/v3.12.0:0fb18b0, Oct  2 2023, 13:03:39) [MSC v.1935 64 bit (AMD64)] on win32
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>>> raise SyntaxError('hello', 'abcdef')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
SyntaxError: hello (a)
>>>

CPython versions tested on:

3.13

Operating systems tested on:

Windows

Linked PRs

• gh-128894: Fix TracebackException._format_syntax_error on custom SyntaxError metadata #128946
• [3.13] gh-128894: Fix TracebackException._format_syntax_error on custom SyntaxError metadata (GH-128946) #129178