chunked-encoding: stop hiding the CURLE_BAD_CONTENT_ENCODING error

Unknown content-encoding would get returned as CURLE_WRITE_ERROR if the
response is chunked-encoded.

Reported-by: Ilya Kosarev
Fixes #4310
Closes #4449

1 files changed, 5 insertions, 5 deletions

diff --git a/lib/transfer.c b/lib/transfer.c
index ef0d80638..44aa10971 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -776,14 +776,14 @@ static CURLcode readwrite_data(struct Curl_easy *data,
          * and writes away the data. The returned 'nread' holds the number
          * of actual data it wrote to the client.
          */
-
+        CURLcode extra;
         CHUNKcode res =
-          Curl_httpchunk_read(conn, k->str, nread, &nread);
+          Curl_httpchunk_read(conn, k->str, nread, &nread, &extra);
 
         if(CHUNKE_OK < res) {
-          if(CHUNKE_WRITE_ERROR == res) {
-            failf(data, "Failed writing data");
-            return CURLE_WRITE_ERROR;
+          if(CHUNKE_PASSTHRU_ERROR == res) {
+            failf(data, "Failed reading the chunked-encoded stream");
+            return extra;
           }
           failf(data, "%s in chunked-encoding", Curl_chunked_strerror(res));
           return CURLE_RECV_ERROR;