Revert part of b853b4f

recv_parse_log_recs(): Do not check for corruption before
checking for end-of-log-buffer. For some reason, adding the
check to the logical-looking place would cause intermittent
recovery failures in the tests innodb.innodb-index and
innodb_gis.rtree_compress2.

Author: dr-m

storage/innobase/log/log0recv.cc

@@ -2401,6 +2401,10 @@ bool recv_parse_log_recs(lsn_t checkpoint_lsn, store_t store, bool apply)
 		len = recv_parse_log_rec(&type, ptr, end_ptr, &space,
 					 &page_no, apply, &body);
 
+		if (len == 0) {
+			return(false);
+		}
+
 		if (recv_sys->found_corrupt_log) {
 			recv_report_corrupt_log(ptr, type, space, page_no);
 			return(true);
@@ -2410,10 +2414,6 @@ bool recv_parse_log_recs(lsn_t checkpoint_lsn, store_t store, bool apply)
 			return(true);
 		}
 
-		if (len == 0) {
-			return(false);
-		}
-
 		new_recovered_lsn = recv_calc_lsn_on_data_add(old_lsn, len);
 
 		if (new_recovered_lsn > recv_sys->scanned_lsn) {
@@ -2540,6 +2540,10 @@ bool recv_parse_log_recs(lsn_t checkpoint_lsn, store_t store, bool apply)
 				&type, ptr, end_ptr, &space, &page_no,
 				false, &body);
 
+			if (len == 0) {
+				return(false);
+			}
+
 			if (recv_sys->found_corrupt_log
 			    || type == MLOG_CHECKPOINT
 			    || (*ptr & MLOG_SINGLE_REC_FLAG)) {
@@ -2553,10 +2557,6 @@ bool recv_parse_log_recs(lsn_t checkpoint_lsn, store_t store, bool apply)
 				return(true);
 			}
 
-			if (len == 0) {
-				return(false);
-			}
-
 			recv_previous_parsed_rec_type = type;
 			recv_previous_parsed_rec_offset
 				= recv_sys->recovered_offset + total_len;