Add a test of fixed issue with same variable name

Author: Smit-create

integration_tests/test_math.py

@@ -239,6 +239,10 @@ def test_issue_1242():
     assert abs(math.pi - 3.14159265358979323846) < 1e-10
     assert abs(math.e - 2.7182818284590452353) < 1e-10
 
+    # https://github.com/lcompilers/lpython/pull/1243#discussion_r1008810444
+    pi: f64 = 8.4603959020429502
+    assert abs(pi - 8.4603959020429502) < 1e-10
+
 
 def check():
     test_factorial_1()