Fuzz all the various options as well

Author: 5225225

fuzz/fuzz_targets/fuzz_regex_match.rs

@@ -1,10 +1,24 @@
 #![no_main]
 use libfuzzer_sys::fuzz_target;
 
-fuzz_target!(|data: (&str, &str)| {
-    let (pattern, input) = data;
+fuzz_target!(|data: (&str, &str, [bool; 7])| {
+    let (
+        pattern,
+        input,
+        [case_insensitive, multi_line, dot_matches_new_line, swap_greed, ignore_whitespace, unicode, octal],
+    ) = data;
 
-    if let Ok(re) = regex::Regex::new(pattern) {
+    let r = regex::RegexBuilder::new(pattern)
+        .case_insensitive(case_insensitive)
+        .multi_line(multi_line)
+        .dot_matches_new_line(dot_matches_new_line)
+        .swap_greed(swap_greed)
+        .ignore_whitespace(ignore_whitespace)
+        .unicode(unicode)
+        .octal(octal)
+        .build();
+
+    if let Ok(re) = r {
         re.is_match(input);
     }
 });