Added more catch substrings to fuzzer

CHANGES.rst

@@ -9,7 +9,7 @@ Minor changes:
 - Added corpus to fuzzing directory
 - Added exclusion of fuzzing corpus in MANIFEST.in
 - Augmented fuzzer to optionally convert multiple calendars from a source string
-
+- Added additional exception handling of defined errors to fuzzer, to allow fuzzer to explore deeper
 Breaking changes:
 
 - ...

src/icalendar/fuzzing/ical_fuzzer.py

@@ -24,7 +24,11 @@ with atheris.instrument_imports(
 
 _value_error_matches = [
     "component", "parse", "Expected", "Wrong date format", "END encountered",
-    "vDDD", 'recurrence', 'Wrong datetime', 'Offset must', 'Invalid iCalendar'
+    "vDDD", 'recurrence', 'Offset must', 'Invalid iCalendar',
+    'alue MUST', 'Key name', 'Invalid content line', 'does not exist',
+    'base 64', 'must use datetime', 'Unknown date type', 'Wrong',
+    'Start time', 'iCalendar', 'recurrence', 'float, float', 'utc offset',
+    'parent'
 ]