librrd_th_la_SOURCES         = $(RRD_C_FILES) rrd_thread_safe.c
 librrd_th_la_CFLAGS          = $(MULTITHREAD_CFLAGS)
-librrd_th_la_LDFLAGS         = $(MULTITHREAD_LDFLAGS) -version-info 2:1:0
+librrd_th_la_LDFLAGS         = $(MULTITHREAD_LDFLAGS) -version-info 2:7:0
 
 
 include_HEADERS        = rrd.h
 
 
     if (rrd_ctx) {
        rrd_ctx->len = 0;
-       rrd_ctx->rrd_error = malloc(MAXLEN);
-       rrd_ctx->lib_errstr = malloc(ERRBUFLEN);
+       rrd_ctx->rrd_error = malloc(MAXLEN+10);
+       rrd_ctx->lib_errstr = malloc(ERRBUFLEN+10);
        if (rrd_ctx->rrd_error && rrd_ctx->lib_errstr) {
            *rrd_ctx->rrd_error = 0;
            *rrd_ctx->lib_errstr = 0;
 
       read_tag(&ptr2,"max","%lf",&(rrd->ds_def[rrd->stat_head->ds_cnt-1].par[DS_max_val].u_val));
          } else { /* DST_CDEF */
                 char buffer[1024];
-            read_tag(&ptr2,"cdef","%s",buffer);
+                read_tag(&ptr2,"cdef","%1000s",buffer);
                 parseCDEF_DS(buffer,rrd,rrd -> stat_head -> ds_cnt - 1);
+                if (rrd_test_error()) return -1;
          }
 
       read_tag(&ptr2,"last_ds","%30s",rrd->pdp_prep[rrd->stat_head->ds_cnt-1].last_ds);
 
     
     rpnp = rpn_parse((void*) rrd, def, &lookup_DS);
     if (rpnp == NULL) {
-        rrd_set_error("failed to parse computed data source %s", def);
+        rrd_set_error("failed to parse computed data source");
         return;
     }
     /* Check for OP nodes not permitted in COMPUTE DS.