python
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+If the current position in a frame has no line number then set the f_lineno
+attribute to None, instead of -1, to conform to PEP 626. This should not
+normally be possible, but might occur in some unusual circumstances.
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+If the current position in a frame has no line number then set the f_lineno`
	`2`	`+attribute to None, instead of -1, to conform to PEP 626. This should not`
	`3`	`+normally be possible, but might occur in some unusual circumstances.`