Add encoding name in LookupError. Fixes #615013. Will backport to 2.2.

diff --git a/Python/codecs.c b/Python/codecs.c
index 12dfe28f847b567860f495185e2047f7e33f5a86..1424bb5b709487e8fa71078524b4be33612d7fbb 100644 (file)
--- a/Python/codecs.c
+++ b/Python/codecs.c
@@ -197,8 +197,8 @@ PyObject *_PyCodec_Lookup(const char *encoding)
     }
     if (i == len) {
        /* XXX Perhaps we should cache misses too ? */
-       PyErr_SetString(PyExc_LookupError,
-                       "unknown encoding");
+       PyErr_Format(PyExc_LookupError,
+                     "unknown encoding: %s", encoding);
        goto onError;
     }