Thanks for the analysis and fix. I'm not sure how that slipped by. I'll commit your patch.

Duncan Murdoch

On 22/05/2008 5:52 PM, Bill Dunlap wrote:
On Thu, 22 May 2008, Bill Dunlap wrote:

Also, if your input starts with certain errors, parse returns
the stuff after the error:
   > parse()
   ?err//one
   expression(one)


After the attached change we get

   > parse()
   ?one
   expression(one)
   > parse(n=2)
   ?one;two;three
   expression(one, two)
   > parse()
   ?err//one
   Error in parse() : unexpected '/' in "err//"

Index: gram.y
===================================================================
--- gram.y      (revision 45762)
+++ gram.y      (working copy)
@@ -1389,8 +1389,6 @@
            if (c == ';' || c == '\n') break;
        }

-       rval = R_Parse1Buffer(buffer, 1, status);
-
        /* Was a call to R_Parse1Buffer, but we don't want to reset xxlineno 
and xxcolno */
        ParseInit();
        ParseContextInit();

The bug arose 2008-02-14, revision 44472, src/main/gram.y,
where it looks like it was intended that the call to
R_Parse1Buffer be replaced by most of the contents of
R_Parse1Buffer, but the the call itself was not removed
(the comment says it was).  My change makes the comment
true.

@@ -1400,6 +1406,12 @@

        rval = R_Parse1Buffer(buffer, 1, status);

+       /* Was a call to R_Parse1Buffer, but we don't want to reset xxlineno 
and x
xcolno */
+       ParseInit();
+       ParseContextInit();
+       R_Parse1(status);
+        rval = R_CurrentExpr;
+
        switch(*status) {

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