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$ go run main.go
panic: regexp: Compile(`(?!`): error parsing regexp: invalid or unsupported Perl syntax: `(?!`
goroutine 1 [running]:
regexp.MustCompile(0x10b7d19, 0x3, 0xc420022070)
/usr/local/Cellar/go/1.10.3/libexec/src/regexp/regexp.go:240 +0x171
exit status 2
Compilation success:
$ go build -o foo
$ echo $?
Runtime fail again:
$ ./foo
panic: regexp: Compile(`(?!`): error parsing regexp: invalid or unsupported Perl syntax: `(?!`
goroutine 1 [running]:
regexp.MustCompile(0x10b7d19, 0x3, 0xc420022070)
/usr/local/Cellar/go/1.10.3/libexec/src/regexp/regexp.go:240 +0x171
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