Divide into two cases so all that all lines are tested

Author: jacobtylerwalls

tests/functional/u/use/used_before_assignment_issue2615.py

@@ -10,6 +10,19 @@ def main():
             res = opened_file.readlines()
     except ZeroDivisionError:
         print(res)  # [used-before-assignment]
+    print(res)
+
+
+def nested_except_blocks():
+    """Don't confuse except blocks with each other."""
+    try:
+        res = 1 / 0
+        res = 42
+        if main():
+            res = None
+        with open(__file__, encoding="utf-8") as opened_file:
+            res = opened_file.readlines()
+    except ZeroDivisionError:
         try:
             more_bad_division = 1 / 0
         except ZeroDivisionError:

tests/functional/u/use/used_before_assignment_issue2615.txt

@@ -1,2 +1,2 @@
 used-before-assignment:12:14:12:17:main:Using variable 'res' before assignment:UNDEFINED
-used-before-assignment:16:18:16:35:main:Using variable 'more_bad_division' before assignment:UNDEFINED
+used-before-assignment:29:18:29:35:nested_except_blocks:Using variable 'more_bad_division' before assignment:UNDEFINED