hare

commit 3bc51a7939630240d0631c628cce6f8a7a9b3dd9
parent 9bedb017e94feed235c1fd63466a2ceb9ee03f48
Author: Drew DeVault <sir@cmpwn.com>
Date:   Sun, 23 May 2021 14:58:07 -0400

bufio::flush: don't flush without any pending data

This fixes the weird write syscall that gets called on @fini for any
Hare program which links to os.

Signed-off-by: Drew DeVault <sir@cmpwn.com>

Diffstat:
M
bufio/buffered.ha
 | 
3
+++

1 file changed, 3 insertions(+), 0 deletions(-)
diff --git a/bufio/buffered.ha b/bufio/buffered.ha
@@ -74,6 +74,9 @@ export fn flush(s: *io::stream) (io::error | void) = {
 	assert(s.writer == &buffered_write,
 		"bufio::flushed used on non-buffered stream");
 	let s = s: *bufstream;
+	if (s.wavail == 0) {
+		return;
+	};
 	io::write(s.source, s.wbuffer[..s.wavail])?;
 	s.wavail = 0;
 	return;