Message 400033 - Python tracker

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Author	Mark.Shannon
Recipients	Mark.Shannon, pablogsal
Date	2021-08-21.15:02:22
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1629558142.96.0.973379723433.issue44964@roundup.psfhosted.org>
In-reply-to

Content
It is not `PyCode_Addr2Line()` that has changed, but `frame->f_lasti`. If you call `PyCode_Addr2Line(frame->f_code, 8)` in 3.9 you get the same behavior as calling `PyCode_Addr2Line(frame->f_code, 8)` in 3.10. Assuming the bytecode is unchanged. The difference is that for the nth instruction `frame->f_lasti` is n*2 for 3.9 and n for 3.10. People should be using `PyFrame_GetLineNumber()`, which is part of the API.

It is not `PyCode_Addr2Line()` that has changed, but `frame->f_lasti`.

If you call 
`PyCode_Addr2Line(frame->f_code, 8)` in 3.9

you get the same behavior as calling 

`PyCode_Addr2Line(frame->f_code, 8)` in 3.10.

Assuming the bytecode is unchanged.

The difference is that for the nth instruction `frame->f_lasti` is n*2 for 3.9 and n for 3.10.

People should be using `PyFrame_GetLineNumber()`, which is part of the API.

History
Date	User	Action	Args
2021-08-21 15:02:22	Mark.Shannon	set	recipients: + Mark.Shannon, pablogsal
2021-08-21 15:02:22	Mark.Shannon	set	messageid: <1629558142.96.0.973379723433.issue44964@roundup.psfhosted.org>
2021-08-21 15:02:22	Mark.Shannon	link	issue44964 messages
2021-08-21 15:02:22	Mark.Shannon	create