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-rw-r--r--generic/tclIO.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/generic/tclIO.c b/generic/tclIO.c
index 8b2e149..aad576a 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -4333,7 +4333,18 @@ Write(
return -1;
}
flushed += statePtr->bufSize;
- if (saved == 0 || src[-1] != '\n') {
+
+ /*
+ * We just flushed. So if we have needNlFlush set to record
+ * that we need to flush because theres a (translated) newline
+ * in the buffer, that's likely not true any more. But there
+ * is a tricky exception. If we have saved bytes that did not
+ * really get flushed and those bytes came from a translation
+ * of a newline as the last thing taken from the src array,
+ * then needNlFlush needs to remain set to flag that the
+ * next buffer still needs a newline flush.
+ */
+ if (needNlFlush && (saved == 0 || src[-1] != '\n')) {
needNlFlush = 0;
}
}