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-rw-r--r--generic/tclIO.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/generic/tclIO.c b/generic/tclIO.c
index 4caa474..8222681 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -10,7 +10,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclIO.c,v 1.137 2008/01/20 21:16:15 hobbs Exp $
+ * RCS: @(#) $Id: tclIO.c,v 1.137.2.1 2008/04/02 20:27:08 andreas_kupries Exp $
*/
#include "tclInt.h"
@@ -8731,7 +8731,7 @@ CopyData(
* don't starve the rest of the system.
*/
- if (cmdPtr) {
+ if (cmdPtr && (csPtr->toRead != 0)) {
/*
* The first time we enter this code, there won't be a channel
* handler established yet, so do it here.