diff.diff

+++ b/src/Perl6/Actions.nqp
@@ -2267,6 +2267,11 @@ class Perl6::Actions is HLL::Actions does STDActions {
     method variable($/) {
         my $past;
         if $<index> {
+            if $<sigil> eq '&' {
+                $*W.throw: $/,
+                    'X::Syntax::Variable::InvalidCaptureSigil',
+                    index => +$<index>;
+            }
             $past := QAST::Op.new(
                 :op('call'),
                 :name('&postcircumfix:<[ ]>'),