[3.10] bpo-44201: Avoid side effects of "invalid_*" rules in the REPL (GH-26298) #26313
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…nGH-26298) When the parser does a second pass to check for errors, these rules can have some small side-effects as they may advance the parser more than the point reached in the first pass. This can cause the tokenizer to ask for extra tokens in interactive mode causing the tokenizer to show the prompt instead of failing instantly. To avoid this, add a new mode to the tokenizer that is activated in the second pass and deactivates asking for new tokens when the interactive line is finished. As the parsing should have reached the last line in the first pass, the second pass should not need to ask for more tokens. (cherry picked from commit bd7476d) Co-authored-by: Pablo Galindo <[email protected]>
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@pablogsal: Status check is done, and it's a success ✅ . |
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@pablogsal: Status check is done, and it's a success ✅ . |
pablogsal
approved these changes
May 22, 2021
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@pablogsal: Status check is done, and it's a success ❌ . |
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When the parser does a second pass to check for errors, these rules can
have some small side-effects as they may advance the parser more than
the point reached in the first pass. This can cause the tokenizer to ask
for extra tokens in interactive mode causing the tokenizer to show the
prompt instead of failing instantly.
To avoid this, add a new mode to the tokenizer that is activated in the
second pass and deactivates asking for new tokens when the interactive
line is finished. As the parsing should have reached the last line in
the first pass, the second pass should not need to ask for more tokens.
(cherry picked from commit bd7476d)
Co-authored-by: Pablo Galindo [email protected]
https://bugs.python.org/issue44201