consume utf8 bom in parser, not lexer

src/lexer.rs

@@ -40,12 +40,7 @@ impl<'a> Iterator for Lexer<'a> {
 impl<'a> Lexer<'a> {
     pub fn new(file: &'a Arc<File>) -> Lexer<'a> {
         Lexer {
-            buf: file
+            buf: file.source().chars().peekable(),
-                .source()
-                .trim_start_matches("\u{ef}\u{bb}\u{bf}")
-                .trim_start_matches("\u{feff}")
-                .chars()
-                .peekable(),
             pos: 0,
             file,
         }

src/parse/mod.rs

@@ -96,6 +96,9 @@ impl<'a> Parser<'a> {
     pub fn parse(&mut self) -> SassResult<Vec<Stmt>> {
         let mut stmts = Vec::new();
 
+        // Allow a byte-order mark at the beginning of the document.
+        self.consume_char_if_exists('\u{feff}');
+
         self.whitespace();
         stmts.append(&mut self.load_modules()?);
 

tests/misc.rs

@@ -101,8 +101,3 @@ test!(
     "\u{feff}a {\n  color: red\n}\n",
     "a {\n  color: red;\n}\n"
 );
-test!(
-    file_begins_with_bom,
-    "\u{ef}\u{bb}\u{bf}a {\n  color: red\n}\n",
-    "a {\n  color: red;\n}\n"
-);