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-rw-r--r--win/tclWinPipe.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/win/tclWinPipe.c b/win/tclWinPipe.c
index 65d4d06..cc696a2 100644
--- a/win/tclWinPipe.c
+++ b/win/tclWinPipe.c
@@ -676,6 +676,7 @@ TclpCreateTempFile(
if (contents != NULL) {
DWORD result, length;
const char *p;
+ int toCopy;
/*
* Convert the contents from UTF to native encoding
@@ -683,7 +684,8 @@ TclpCreateTempFile(
native = Tcl_UtfToExternalDString(NULL, contents, -1, &dstring);
- for (p = native; *p != '\0'; p++) {
+ toCopy = Tcl_DStringLength(&dstring);
+ for (p = native; toCopy > 0; p++, toCopy--) {
if (*p == '\n') {
length = p - native;
if (length > 0) {