diff --git a/lib/compiler/passes/generate-js.js b/lib/compiler/passes/generate-js.js
index 68d0b19..6a2747e 100644
--- a/lib/compiler/passes/generate-js.js
+++ b/lib/compiler/passes/generate-js.js
@@ -148,7 +148,9 @@ function generateJS( ast, options ) {
 
         parts.push( [
             "",
-            "var rule$expects = peg$expect;",
+            "var rule$expects = function (expected) {",
+            "  if (peg$silentFails === 0) peg$expect(expected);",
+            "}",
             ""
         ].join( "\n" ) );
 
diff --git a/lib/parser/index.js b/lib/parser/index.js
index ea349dc..c01e50b 100644
--- a/lib/parser/index.js
+++ b/lib/parser/index.js
@@ -540,7 +540,9 @@ function peg$parse(input, options) {
   function peg$parseGrammar() {
     var s0, s1, s2, s3, s4, s5, s6;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parse__();
@@ -599,7 +601,9 @@ function peg$parse(input, options) {
   function peg$parseInitializer() {
     var s0, s1, s2;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parseCodeBlock();
@@ -623,7 +627,9 @@ function peg$parse(input, options) {
   function peg$parseRule() {
     var s0, s1, s2, s3, s4, s5, s6, s7;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parseIdentifierName();
@@ -680,7 +686,9 @@ function peg$parse(input, options) {
   function peg$parseChoiceExpression() {
     var s0, s1, s2, s3, s4, s5, s6, s7;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parseActionExpression();
@@ -748,7 +756,9 @@ function peg$parse(input, options) {
   function peg$parseActionExpression() {
     var s0, s1, s2, s3, s4;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parseSequenceExpression();
@@ -779,7 +789,9 @@ function peg$parse(input, options) {
   function peg$parseSequenceExpression() {
     var s0, s1, s2, s3, s4, s5;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parseLabeledExpression();
@@ -821,7 +833,9 @@ function peg$parse(input, options) {
   function peg$parseLabeledExpression() {
     var s0, s1, s2, s3, s4, s5;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parseIdentifier();
@@ -862,7 +876,9 @@ function peg$parse(input, options) {
   function peg$parsePrefixedExpression() {
     var s0, s1, s2, s3;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parsePrefixedOperator();
@@ -890,7 +906,9 @@ function peg$parse(input, options) {
   function peg$parsePrefixedOperator() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e3);
     if (input.charCodeAt(peg$currPos) === 36) {
@@ -924,7 +942,9 @@ function peg$parse(input, options) {
   function peg$parseSuffixedExpression() {
     var s0, s1, s2, s3;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parsePrimaryExpression();
@@ -952,7 +972,9 @@ function peg$parse(input, options) {
   function peg$parseSuffixedOperator() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e6);
     if (input.charCodeAt(peg$currPos) === 63) {
@@ -986,7 +1008,9 @@ function peg$parse(input, options) {
   function peg$parsePrimaryExpression() {
     var s0, s1, s2, s3, s4, s5;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$parseLiteralMatcher();
     if (s0 === peg$FAILED) {
@@ -1045,7 +1069,9 @@ function peg$parse(input, options) {
   function peg$parseRuleReferenceExpression() {
     var s0, s1, s2, s3, s4, s5, s6, s7;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parseIdentifierName();
@@ -1106,7 +1132,9 @@ function peg$parse(input, options) {
   function peg$parseSemanticPredicateExpression() {
     var s0, s1, s2, s3;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parseSemanticPredicateOperator();
@@ -1131,7 +1159,9 @@ function peg$parse(input, options) {
   function peg$parseSemanticPredicateOperator() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e4);
     if (input.charCodeAt(peg$currPos) === 38) {
@@ -1156,7 +1186,9 @@ function peg$parse(input, options) {
   function peg$parseSourceCharacter() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e11);
     if (input.length > peg$currPos) {
@@ -1172,7 +1204,9 @@ function peg$parse(input, options) {
   function peg$parseWhiteSpace() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e12);
     peg$silentFails++;
@@ -1233,7 +1267,9 @@ function peg$parse(input, options) {
   function peg$parseLineTerminator() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e13);
     if (peg$r0.test(input.charAt(peg$currPos))) {
@@ -1249,7 +1285,9 @@ function peg$parse(input, options) {
   function peg$parseLineTerminatorSequence() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e14);
     peg$silentFails++;
@@ -1299,7 +1337,9 @@ function peg$parse(input, options) {
   function peg$parseComment() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e15);
     peg$silentFails++;
@@ -1315,7 +1355,9 @@ function peg$parse(input, options) {
   function peg$parseMultiLineComment() {
     var s0, s1, s2, s3, s4, s5;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     if (input.substr(peg$currPos, 2) === peg$c22) {
@@ -1411,7 +1453,9 @@ function peg$parse(input, options) {
   function peg$parseMultiLineCommentNoLineTerminator() {
     var s0, s1, s2, s3, s4, s5;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     rule$expects(peg$e16);
@@ -1517,7 +1561,9 @@ function peg$parse(input, options) {
   function peg$parseSingleLineComment() {
     var s0, s1, s2, s3, s4, s5;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     rule$expects(peg$e18);
@@ -1593,7 +1639,9 @@ function peg$parse(input, options) {
   function peg$parseIdentifier() {
     var s0, s1;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parseIdentifierName();
@@ -1609,7 +1657,9 @@ function peg$parse(input, options) {
   function peg$parseIdentifierName() {
     var s0, s1, s2, s3;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e19);
     peg$silentFails++;
@@ -1636,7 +1686,9 @@ function peg$parse(input, options) {
   function peg$parseIdentifierStart() {
     var s0, s1, s2;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$parseUnicodeLetter();
     if (s0 === peg$FAILED) {
@@ -1684,7 +1736,9 @@ function peg$parse(input, options) {
   function peg$parseIdentifierPart() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$parseIdentifierStart();
     if (s0 === peg$FAILED) {
@@ -1719,7 +1773,9 @@ function peg$parse(input, options) {
   function peg$parseUnicodeLetter() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$parseLu();
     if (s0 === peg$FAILED) {
@@ -1744,7 +1800,9 @@ function peg$parse(input, options) {
   function peg$parseUnicodeCombiningMark() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$parseMn();
     if (s0 === peg$FAILED) {
@@ -1757,7 +1815,9 @@ function peg$parse(input, options) {
   function peg$parseLiteralMatcher() {
     var s0, s1, s2;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e20);
     peg$silentFails++;
@@ -1787,7 +1847,9 @@ function peg$parse(input, options) {
   function peg$parseStringLiteral() {
     var s0, s1, s2, s3;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e21);
     peg$silentFails++;
@@ -1863,7 +1925,9 @@ function peg$parse(input, options) {
   function peg$parseDoubleStringCharacter() {
     var s0, s1, s2;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$currPos;
@@ -1937,7 +2001,9 @@ function peg$parse(input, options) {
   function peg$parseSingleStringCharacter() {
     var s0, s1, s2;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$currPos;
@@ -2011,7 +2077,9 @@ function peg$parse(input, options) {
   function peg$parseCharacterClassMatcher() {
     var s0, s1, s2, s3, s4, s5;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e22);
     peg$silentFails++;
@@ -2078,7 +2146,9 @@ function peg$parse(input, options) {
   function peg$parseClassCharacterRange() {
     var s0, s1, s2, s3;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parseClassCharacter();
@@ -2113,7 +2183,9 @@ function peg$parse(input, options) {
   function peg$parseClassCharacter() {
     var s0, s1, s2;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$currPos;
@@ -2187,7 +2259,9 @@ function peg$parse(input, options) {
   function peg$parseLineContinuation() {
     var s0, s1, s2;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     if (input.charCodeAt(peg$currPos) === 92) {
@@ -2216,7 +2290,9 @@ function peg$parse(input, options) {
   function peg$parseEscapeSequence() {
     var s0, s1, s2, s3;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$parseCharacterEscapeSequence();
     if (s0 === peg$FAILED) {
@@ -2263,7 +2339,9 @@ function peg$parse(input, options) {
   function peg$parseCharacterEscapeSequence() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$parseSingleEscapeCharacter();
     if (s0 === peg$FAILED) {
@@ -2276,7 +2354,9 @@ function peg$parse(input, options) {
   function peg$parseSingleEscapeCharacter() {
     var s0, s1;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (input.charCodeAt(peg$currPos) === 39) {
       s0 = peg$c31;
@@ -2391,7 +2471,9 @@ function peg$parse(input, options) {
   function peg$parseNonEscapeCharacter() {
     var s0, s1, s2;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$currPos;
@@ -2427,7 +2509,9 @@ function peg$parse(input, options) {
   function peg$parseEscapeCharacter() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$parseSingleEscapeCharacter();
     if (s0 === peg$FAILED) {
@@ -2456,7 +2540,9 @@ function peg$parse(input, options) {
   function peg$parseHexEscapeSequence() {
     var s0, s1, s2, s3, s4, s5;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     if (input.charCodeAt(peg$currPos) === 120) {
@@ -2505,7 +2591,9 @@ function peg$parse(input, options) {
   function peg$parseUnicodeEscapeSequence() {
     var s0, s1, s2, s3, s4, s5, s6, s7;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     if (input.charCodeAt(peg$currPos) === 117) {
@@ -2566,7 +2654,9 @@ function peg$parse(input, options) {
   function peg$parseDecimalDigit() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r1.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -2581,7 +2671,9 @@ function peg$parse(input, options) {
   function peg$parseHexDigit() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r2.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -2596,7 +2688,9 @@ function peg$parse(input, options) {
   function peg$parseAnyMatcher() {
     var s0, s1;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     rule$expects(peg$e23);
@@ -2618,7 +2712,9 @@ function peg$parse(input, options) {
   function peg$parseCodeBlock() {
     var s0, s1, s2, s3;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     rule$expects(peg$e24);
     peg$silentFails++;
@@ -2670,7 +2766,9 @@ function peg$parse(input, options) {
   function peg$parseCode() {
     var s0, s1, s2, s3, s4, s5;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = [];
@@ -2873,7 +2971,9 @@ function peg$parse(input, options) {
   function peg$parseLl() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r4.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -2888,7 +2988,9 @@ function peg$parse(input, options) {
   function peg$parseLm() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r5.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -2903,7 +3005,9 @@ function peg$parse(input, options) {
   function peg$parseLo() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r6.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -2918,7 +3022,9 @@ function peg$parse(input, options) {
   function peg$parseLt() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r7.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -2933,7 +3039,9 @@ function peg$parse(input, options) {
   function peg$parseLu() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r8.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -2948,7 +3056,9 @@ function peg$parse(input, options) {
   function peg$parseMc() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r9.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -2963,7 +3073,9 @@ function peg$parse(input, options) {
   function peg$parseMn() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r10.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -2978,7 +3090,9 @@ function peg$parse(input, options) {
   function peg$parseNd() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r11.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -2993,7 +3107,9 @@ function peg$parse(input, options) {
   function peg$parseNl() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r12.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -3008,7 +3124,9 @@ function peg$parse(input, options) {
   function peg$parsePc() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r13.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -3023,7 +3141,9 @@ function peg$parse(input, options) {
   function peg$parseZs() {
     var s0;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     if (peg$r14.test(input.charAt(peg$currPos))) {
       s0 = input.charAt(peg$currPos);
@@ -3038,7 +3158,9 @@ function peg$parse(input, options) {
   function peg$parse__() {
     var s0, s1;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = [];
     s1 = peg$parseWhiteSpace();
@@ -3065,7 +3187,9 @@ function peg$parse(input, options) {
   function peg$parse_() {
     var s0, s1;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = [];
     s1 = peg$parseWhiteSpace();
@@ -3086,7 +3210,9 @@ function peg$parse(input, options) {
   function peg$parseEOS() {
     var s0, s1, s2, s3;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     s1 = peg$parse__();
@@ -3139,7 +3265,9 @@ function peg$parse(input, options) {
   function peg$parseEOF() {
     var s0, s1;
 
-    var rule$expects = peg$expect;
+    var rule$expects = function (expected) {
+      if (peg$silentFails === 0) peg$expect(expected);
+    }
 
     s0 = peg$currPos;
     peg$begin();