Bug report

Bug description:

When I run def f[Foo, Foo](): ... from a file, I get a nice error message including the location of the error:

  File ".../test.py", line 1
    def f[Foo, Foo](): ...
               ^^^
SyntaxError: duplicate type parameter 'Foo'

However, when I run this in the new repl, the error location is not shown:

>>> def f[Foo, Foo](): ...
  File "<python-input-0>", line 1
SyntaxError: duplicate type parameter 'Foo'

The same thing happens with this error as well:

>>> def f(x, x): ...
  File "<python-input-0>", line 1
SyntaxError: duplicate argument 'x' in function definition

The missing location seems to be the case for these two errors only as other errors do show it:

>>> def f(42): ...
  File "<unknown>", line 1
    def f(42): ...
          ^^
SyntaxError: invalid syntax

What's interesting is that for the first two errors the file shows up as <python-input-0> while for the last one it's <unknown>. This could be related to the last error coming from the parser while the previous errors come from symtable:

Though it looks like that the error location is being set with SET_ERROR_LOCATION..

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-121804: always show error location for SyntaxError's in new repl #121886
• [3.13] gh-121804: Always show error location for SyntaxError's in new repl (GH-121886) #123148
• gh-121804: always show error location for SyntaxError's in basic repl #123202
• [3.12] gh-121804: Backport idlelib.pyshell change (GH-121886) #123366
• [3.13] gh-121804: always show error location for SyntaxError's in basic repl (GH-123202) #123631