Index: subversion/libsvn_subr/io.c
===================================================================
--- subversion/libsvn_subr/io.c	(revision 21505)
+++ subversion/libsvn_subr/io.c	(working copy)
@@ -1839,9 +1839,9 @@
 
   /* Wait for the cmd command to finish. */
   apr_err = apr_proc_wait (cmd_proc, &exitcode_val, &exitwhy_val, APR_WAIT);
-  if (APR_STATUS_IS_CHILD_NOTDONE (apr_err))
-    return svn_error_wrap_apr (apr_err, _("Error waiting for process '%s'"),
-                               cmd);
+  if (!APR_STATUS_IS_CHILD_DONE (apr_err))
+    return svn_error_wrap_apr (apr_err, _("Error waiting for pid/process [%i]/'%s'"),
+                               cmd_proc->pid, cmd);
 
   if (exitwhy)
     *exitwhy = exitwhy_val;