tests/unix/extra_coverage: Add test for str/bytes with invalid hash.

tests/unix/extra_coverage.py

@@ -5,4 +5,11 @@ except NameError:
     import sys
     sys.exit()
 
-extra_coverage()
+data = extra_coverage()
+
+# test hashing of str/bytes that have an invalid hash
+print(data)
+print(hash(data[0]))
+print(hash(data[1]))
+print(hash(bytes(data[0], 'utf8')))
+print(hash(str(data[1], 'utf8')))

tests/unix/extra_coverage.py.exp

@@ -35,3 +35,8 @@ ementation
 12345678
 0
 0
+('0123456789', b'0123456789')
+7300
+7300
+7300
+7300