Bug report

Bug description:

SyntaxError reports incorrect line number in error message vs displayed code

Description

When a syntax error occurs in a multi-line statement, Python reports one line number in the error message but displays a different line in the code snippet. This creates confusion for users trying to locate and fix the problem.

Python version: Python 3.14.3

Note: This issue appears specifically when importing the file containing the syntax error, not when running it directly.

Reproduction

Create a file bug.py with this code:

def create():
    streams = []

    def add(service_id=0, quota=0):
        task = None
        num = len(streams)

        def fe_start(coro):
            nonlocal task
            assert task is None
            task = asyncio.create_task(coro)

        be = SimpleNamespace()
        streams.append(be)
        return SimpleNamespace(
                num=num
                start=fe_start)

    return SimpleNamespace(
            add=add)

Then import it: python -c "import bug"

Actual Behavior

Traceback (most recent call last):
  File "<string>", line 1, in <module>
    import bug
  File "/tmp/bug.py", line 16
    num = len(streams)
          ^^^
SyntaxError: invalid syntax. Did you mean 'False'?

The error message reports line 16, but the displayed code shows line 6 (num = len(streams)).

Expected Behavior

The error message should report the same line number as the code displayed, or display the code from the reported line number, like when running the file directly using python bug.py

  File "/tmp/bug.py", line 16
    num=num
        ^^^
SyntaxError: invalid syntax. Perhaps you forgot a comma?

Root Cause

The actual syntax error is a missing comma on line 16 after num=num, but Python's import error reporting mechanism displays code from a different line, creating a mismatch.

Impact

This inconsistency makes debugging more difficult, as users must manually search for the actual problem rather than being directed to it.

CPython versions tested on:

3.14

Operating systems tested on:

Linux