Take key length (#105)

* Checking for raw attr, check key-length

* Adds a test

* Make sure both are less than...

* Adds a changeset

.changeset/rotten-years-warn.md

@@ -0,0 +1,5 @@
+---
+'@astrojs/compiler': patch
+---
+
+Prevents overrunning an array when checking for raw attribute

internal/token.go

@@ -935,9 +935,10 @@ loop:
 func (z *Tokenizer) hasTag(s string) bool {
 loop:
 	for i := len(z.attr) - 1; i >= 0; i-- {
+
 		x := z.attr[i]
 		key := z.buf[x[0].Start:x[0].End]
-		for i := 0; i < len(s); i++ {
+		for i := 0; i < len(key) && i < len(s); i++ {
 			c := key[i]
 			if 'A' <= c && c <= 'Z' {
 				c += 'a' - 'A'

internal/token_test.go

@@ -107,6 +107,11 @@ func TestBasic(t *testing.T) {
 			"<span data-astro-raw>function foo() { }</span>",
 			[]TokenType{StartTagToken, TextToken, EndTagToken},
 		},
+		{
+			"Doesn't throw on other data attributes",
+			"<span data-foo></span>",
+			[]TokenType{StartTagToken, EndTagToken},
+		},
 	}
 
 	runTokenTypeTest(t, Basic)