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scanner: Add unit test triggering a panic in scanHeredoc().

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```
panic: regexp: Compile("[[:space:]]*<\xc8\\z"): error parsing regexp: invalid UTF-8: `�\z`

goroutine 32 [running]:
testing.tRunner.func1(0xc4200cae10)
        /usr/lib/google-golang/src/testing/testing.go:742 +0x29d
panic(0x507a00, 0xc420290690)
        /usr/lib/google-golang/src/runtime/panic.go:505 +0x229
regexp.MustCompile(0xc420289e10, 0x10, 0xc420087680)
        /usr/lib/google-golang/src/regexp/regexp.go:240 +0x171
github.com/hashicorp/hcl/hcl/scanner.(*Scanner).scanHeredoc(0xc4200878c0)
        gopath/src/github.com/hashicorp/hcl/hcl/scanner/scanner.go:444 +0x3a9
github.com/hashicorp/hcl/hcl/scanner.(*Scanner).Scan(0xc4200878c0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
        gopath/src/github.com/hashicorp/hcl/hcl/scanner/scanner.go:186 +0x3e5
```
This commit is contained in:
Florian Forster 2018-03-19 12:01:22 +01:00 committed by Florian Forster
parent b1738d9053
commit 73fde59edb
1 changed files with 19 additions and 0 deletions
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19
hcl/scanner/scanner_test.go
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@ -589,3 +589,22 @@ func countNewlines(s string) int {
} }
return n return n
} }
func TestScanHeredocRegexpCompile(t *testing.T) {
cases := []string{
"0\xe1\n<<ȸ\nhello\nworld\nȸ",
}
for _, c := range cases {
s := New([]byte(c))
fmt.Printf("START %q\n", c)
for {
tok := s.Scan()
if tok.Type == token.EOF {
break
}
t.Logf("s.Scan() = %s", tok)
}
}
}