fix(fuzz): handle bare "invalid argument" (#899)

OSS-Fuzz finding #471520156 had an assert caused by the
time.LoadLocation outputting "invalid argument" for a null byte
argument. The fuzz test was already intentionally skipping
"invalid argument for" as a regex, which didn't match this err
string.

Changes:

- Simplify regex to match both "invalid argument for X" and bare form
- Remove redundant "operator in" pattern (covered by wildcard variant)

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>

Author: thevilledev

test/fuzz/fuzz_test.go

@@ -26,7 +26,7 @@ func FuzzExpr(f *testing.F) {
 		regexp.MustCompile(`error parsing regexp`),
 		regexp.MustCompile(`integer divide by zero`),
 		regexp.MustCompile(`interface conversion`),
-		regexp.MustCompile(`invalid argument for .*`),
+		regexp.MustCompile(`invalid argument`),
 		regexp.MustCompile(`invalid character`),
 		regexp.MustCompile(`invalid operation`),
 		regexp.MustCompile(`invalid duration`),
@@ -46,7 +46,6 @@ func FuzzExpr(f *testing.F) {
 		regexp.MustCompile(`reflect: string index out of range`),
 		regexp.MustCompile(`strings: negative Repeat count`),
 		regexp.MustCompile(`strings: illegal bytes to escape`),
-		regexp.MustCompile(`operator "in" not defined on int`),
 		regexp.MustCompile(`invalid date .*`),
 		regexp.MustCompile(`cannot parse .* as .*`),
 		regexp.MustCompile(`operator "in" not defined on .*`),