On Mon, 23 Aug 2010, Daniel Stenberg wrote:

>> I am seeing an assertion which appears to be a case where a chunked
>> response is processed and a rewind is attempted, but a master_buffer
>> has not been allocated. Has anyone else observed this behavior?

> I've not seen this before. Can you try to work on making a recipe for us to repeat this? Are you using pipelining?

Using the multi interface, pipeling is disabled. My home-grown server is sending a chunk-encoded response to a GET. If I do enable pipelining, then the assertion is no longer seen.

I have worked around the problem with the following patch:

--- curl-7.21.1.orig/lib/transfer.c
+++ curl-7.21.1/lib/transfer.c
@@ -594,9 +594,15 @@
 
           dataleft = conn->chunk.dataleft;
           if(dataleft != 0) {
- infof(conn->data, "Leftovers after chunking. "
- " Rewinding %zu bytes\n",dataleft);
- read_rewind(conn, dataleft);
+ if(conn->data->multi && Curl_multi_canPipeline(conn->data->multi)) {
+ infof(conn->data, "Leftovers after chunking. "
+ " Rewinding %zu bytes\n",dataleft);
+ read_rewind(conn, dataleft);
+ }
+ else {
+ infof(conn->data, "Leftovers after chunking in a non pipelined read. "
+ " Leaving %zu bytes\n",dataleft);
+ }
           }
         }
         /* If it returned OK, we just keep going */
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Received on 2010-08-23