Symptom:
The inspect class-map is a nested class-map, with one 'match class-map ...' statement already configured. IOSd crash when the 'no match class-map ...' command is entered (e.g., typo error):
csr(config)#class-map type inspect parent
csr(config-cmap)#match class-map child
csr(config-cmap)#no match class-map non-exist

The crash only happen for inspect class-map, performing the same operation with regular class-map does not cause IOSd crash.

Conditions:
Removing non-exist 'match class-map ...' statement from nested inspect class-map.