Lysandros Nikolaou <lisandros...@gmail.com> added the comment:

> Hm, but there the old parser seems at fault: it points to the last space 
> rather than beyond it?

Both parsers seem to have the same behaviour, when parsing files. I just found 
out that even the new parser points to the `|` if there is not trailing 
whitespace:

╰─ cat -e t.py
x = 1 | 2 |$
╰─ ./python.exe t.py
  File "/Users/lysnikolaou/Repositories/cpython/t.py", line 1
    x = 1 | 2 |
              ^
SyntaxError: invalid syntax
╰─ ./python.exe -X oldparser t.py
  File "/Users/lysnikolaou/Repositories/cpython/t.py", line 1
    x = 1 | 2 |
              ^
SyntaxError: invalid syntax

I'll investigate more tomorrow.

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