remove some panicking

src/lib.rs

@@ -326,7 +326,10 @@ pub(crate) fn eat_expr<I: Iterator<Item = Token>>(
                 }
             }
             '@' => {
-                toks.next();
+                let span = toks.next().unwrap().pos();
+                if toks.peek().is_none() {
+                    return Err(("Expected identifier.", span).into());
+                }
                 let Spanned { node: ident, span } = eat_ident(toks, scope, super_selector)?;
                 devour_whitespace(toks);
                 let rule = AtRule::from_tokens(

src/value/parse.rs

@@ -885,8 +885,10 @@ impl Value {
                 }
             }
             ';' | '}' | '{' => return None,
-            ':' | '?' | ')' | '@' => return Some(Err(("expected \";\".", span).into())),
-            v if v.is_control() => return Some(Err(("Expected expression.", span).into())),
+            ':' | '?' | ')' | '@' | '^' => return Some(Err(("expected \";\".", span).into())),
+            v if v as u32 >= 0x80 || v.is_control() => {
+                return Some(Err(("Expected expression.", span).into()))
+            }
             v => todo!("unexpected token in value parsing: {:?}", v),
         }))
     }

tests/error.rs

@@ -57,3 +57,8 @@ error!(
     no_value_after_forward_slash,
     "a {color: 303/;}", "Error: Expected expression."
 );
+error!(xor_in_value, "a {color: a^;}", "Error: expected \";\".");
+error!(
+    nothing_after_at_sign,
+    "a {color: red; @", "Error: Expected identifier."
+);