Backed out changeset 1a71f73b9b7d due to bustage.

js/src/frontend/Parser-inl.h

@@ -46,7 +46,7 @@ ParseContext<ParseHandler>::ParseContext(Parser<ParseHandler> *prs, SharedContex
     decls_(prs->context),
     args_(prs->context),
     vars_(prs->context),
-    yieldOffset(0),
+    yieldNode(ParseHandler::null()),
     parserPC(&prs->pc),
     lexdeps(prs->context),
     parent(prs->pc),

js/src/frontend/Parser.cpp

@@ -332,9 +332,12 @@ ParseContext<ParseHandler>::generateFunctionBindings(JSContext *cx, InternalHand
 
 template <typename ParseHandler>
 bool
-Parser<ParseHandler>::report(ParseReportKind kind, bool strict, uint32_t offset,
-                             unsigned errorNumber, va_list args)
+Parser<ParseHandler>::report(ParseReportKind kind, bool strict, Node pn, unsigned errorNumber, ...)
 {
+    uint32_t offset = (pn ? handler.getPosition(pn) : tokenStream.currentToken().pos).begin;
+
+    va_list args;
+    va_start(args, errorNumber);
     bool result = false;
     switch (kind) {
       case ParseError:
@@ -351,30 +354,6 @@ Parser<ParseHandler>::report(ParseReportKind kind, bool strict, uint32_t offset,
         result = tokenStream.reportStrictModeErrorNumberVA(offset, strict, errorNumber, args);
         break;
     }
-    return result;
-}
-
-template <typename ParseHandler>
-bool
-Parser<ParseHandler>::report(ParseReportKind kind, bool strict, Node pn, unsigned errorNumber, ...)
-{
-    uint32_t offset = (pn ? handler.getPosition(pn) : tokenStream.currentToken().pos).begin;
-
-    va_list args;
-    va_start(args, errorNumber);
-    bool result = report(kind, strict, offset, errorNumber, args);
-    va_end(args);
-    return result;
-}
-
-template <typename ParseHandler>
-bool
-Parser<ParseHandler>::reportWithOffset(ParseReportKind kind, bool strict, uint32_t offset,
-                                       unsigned errorNumber, ...)
-{
-    va_list args;
-    va_start(args, errorNumber);
-    bool result = report(kind, strict, offset, errorNumber, args);
     va_end(args);
     return result;
 }
@@ -2903,7 +2882,7 @@ Parser<ParseHandler>::returnOrYield(bool useAssignExpr)
             pc->sc->asFunctionBox()->setIsGenerator();
         } else {
             pc->yieldCount++;
-            pc->yieldOffset = handler.getPosition(pn).begin;
+            pc->yieldNode = pn;
         }
     }
 #endif
@@ -5236,7 +5215,7 @@ class GenexpGuard
         ParseContext<ParseHandler> *pc = parser->pc;
         if (pc->parenDepth == 0) {
             pc->yieldCount = 0;
-            pc->yieldOffset = 0;
+            pc->yieldNode = ParseHandler::null();
         }
         startYieldCount = pc->yieldCount;
         pc->parenDepth++;
@@ -5267,12 +5246,10 @@ GenexpGuard<ParseHandler>::checkValidBody(Node pn, unsigned err)
 {
     ParseContext<ParseHandler> *pc = parser->pc;
     if (pc->yieldCount > startYieldCount) {
-        uint32_t offset = pc->yieldOffset
-                          ? pc->yieldOffset
-                          : (pn ? parser->handler.getPosition(pn)
-                                : parser->tokenStream.currentToken().pos).begin;
-
-        parser->reportWithOffset(ParseError, false, offset, err, js_yield_str);
+        Node errorNode = pc->yieldNode;
+        if (!errorNode)
+            errorNode = pn;
+        parser->report(ParseError, false, errorNode, err, js_yield_str);
         return false;
     }
 

js/src/frontend/Parser.h

@@ -155,10 +155,10 @@ struct ParseContext                 /* tree context for semantic checks */
     bool generateFunctionBindings(JSContext *cx, InternalHandle<Bindings*> bindings) const;
 
   public:
-    uint32_t         yieldOffset;   /* offset of a yield expression that might
-                                       be an error if we turn out to be inside
-                                       a generator expression.  Zero means
-                                       there isn't one. */
+    Node             yieldNode;     /* parse node for a yield expression that might
+                                       be an error if we turn out to be inside a
+                                       generator expression */
+
   private:
     ParseContext    **parserPC;     /* this points to the Parser's active pc
                                        and holds either |this| or one of
@@ -296,13 +296,7 @@ struct Parser : private AutoGCRooter, public StrictModeGetter
     /* State specific to the kind of parse being performed. */
     ParseHandler handler;
 
-  private:
-    bool report(ParseReportKind kind, bool strict, uint32_t offset,
-                unsigned errorNumber, va_list args);
-  public:
     bool report(ParseReportKind kind, bool strict, Node pn, unsigned errorNumber, ...);
-    bool reportWithOffset(ParseReportKind kind, bool strict, uint32_t offset, unsigned errorNumber,
-                          ...);
 
     Parser(JSContext *cx, const CompileOptions &options,
            const jschar *chars, size_t length, bool foldConstants);

js/src/jit-test/tests/basic/bug854137.js

@@ -1,6 +0,0 @@
-// Don't assert.
-try {
-    eval("function x(y = {\
-        x: (7) ? 0 : yield(0)\
-    }");
-} catch (e) {}