profile._f_lineno: handle next_line being None in Python 3.13 (#8710)

In Python 3.13, it's possible for `dis.findlinestarts` to return a line number as `None`. We don't ever want to return `None` as the line number, so guard against this. Signed-off-by: Adam Williamson <[email protected]>
dask · Jun 20, 2024 · 8506165 · 8506165
1 parent aeebb2d
commit 8506165
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/distributed/profile.py b/distributed/profile.py
@@ -90,7 +90,8 @@ def _f_lineno(frame: FrameType) -> int:
         for start, next_line in dis.findlinestarts(code):
             if f_lasti < start:
                 return prev_line
-            prev_line = next_line
+            if next_line:
+                prev_line = next_line
 
         return prev_line
     except Exception: