backport of r60575 (issue #1750076): Debugger did not step on every iteration of a while statement.
The mapping between bytecode offsets and source lines (lnotab) did not contain
an entry for the beginning of the loop.
Now it does, and the lnotab can be a bit larger:
in particular, several statements on the same line generate several entries.
However, this does not bother the settrace function, which will trigger only
one 'line' event.
The lnotab seems to be exactly the same as with python2.4.
diff --git a/Misc/NEWS b/Misc/NEWS
index 5cd8e4a..c9b86e2 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -80,6 +80,10 @@
Library
-------
+- #175006: The debugger used to skip the condition of a "while" statement
+ after the first iteration. Now it correctly steps on the expression, and
+ breakpoints on the "while" statement are honored on each loop.
+
- The ctypes int types did not accept objects implementing
__int__() in the constructor.