Produce a better error message for unclosed style rules (#586)

Closes #577
sass · Feb 2, 2019 · a810172 · a810172
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -6,6 +6,9 @@
   next token that wasn't what was expected, they point *after* the previous
   token. This should generally provide more context for the syntax error.
 
+* Produce a better error message for style rules that are missing the closing
+  `}`.
+
 ### Command-Line Interface
 
 * Passing a directory on the command line now compiles all Sass source files in

diff --git a/lib/src/parse/stylesheet.dart b/lib/src/parse/stylesheet.dart
@@ -253,6 +253,8 @@ abstract class StylesheetParser extends Parser {
     var wasInStyleRule = _inStyleRule;
     _inStyleRule = true;
 
+    if (buffer.isEmpty) scanner.error('expected "}".');
+
     return _withChildren(_statement, start, (children, span) {
       if (indented && children.isEmpty) {
         warn("This selector doesn't have any properties and won't be rendered.",