CompressingReader: account for possible out buffer state

It is possible for out buffer to have no overflow data and yet the read offset will be not zero (if byte slices passed by the reader just happened to align perfectly). Signed-off-by: Alex Dubov <oakad@yahoo.com>
pierrec · Nov 13, 2023 · 4a80a2f · 4a80a2f
1 parent f2ece5b
commit 4a80a2f
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/compressing_reader.go b/compressing_reader.go
@@ -206,6 +206,11 @@ func (wr *ovWriter) reset(out []byte) bool {
 		wr.dataPos = ovRem
 	}
 
+	if wr.ovPos > 0 {
+		wr.ov = wr.ov[ : 0]
+		wr.ovPos = 0
+	}
+
 	wr.data = out
 	return true
 }