Add more tests for further ClusterFuzz issues, all were fixed by the previous

patch; they just crashed in different ways. The fixed issues are ClusterFuzz 
numbers 9522, 9534, 9535, 9541, 9542. The bug was a new one, introduced by a 
recent code update (never in a release).

testdata/testinput1

@@ -6248,4 +6248,8 @@ ef) x/x,mark
 
 /(.COMMIT)(*COMMIT::::::::::interal error:::)/
 
+/(*COMMIT:ÿÿ)/
+
+/(*COMMIT:]w)/
+
 # End of testinput1 

testdata/testoutput1

@@ -9908,4 +9908,8 @@ No match, mark = X
 
 /(.COMMIT)(*COMMIT::::::::::interal error:::)/
 
+/(*COMMIT:ÿÿ)/
+
+/(*COMMIT:]w)/
+
 # End of testinput1