Add simplified test cases for inference of pattern variables

Author: cdce8p

ChangeLog

@@ -66,6 +66,10 @@ Release date: TBA
 
   Closes #4668
 
+* Fix crash when inferring variables assigned in match patterns
+
+  Closes #4685
+
 
 What's New in Pylint 2.9.3?
 ===========================

tests/functional/p/pattern_matching.py

@@ -22,3 +22,17 @@ def __init__(self, x, y):
         print(new_point)
     case new_var:
         print(new_var)
+
+
+# Test inference of variables assigned in patterns doesn't crash pylint
+var = 42
+match var:
+    case (1, *rest3):
+        if rest3 != 2:
+            pass
+    case {1: _, **rest4}:
+        if rest4 != 2:
+            pass
+    case c:
+        if c != 2:
+            pass