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-rw-r--r--src/compress/lzw/reader.go2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/compress/lzw/reader.go b/src/compress/lzw/reader.go
index cd90c9c63a..0835bd8b90 100644
--- a/src/compress/lzw/reader.go
+++ b/src/compress/lzw/reader.go
@@ -222,6 +222,8 @@ func (d *decoder) Close() error {
// NewReader creates a new io.ReadCloser.
// Reads from the returned io.ReadCloser read and decompress data from r.
+// If r does not also implement io.ByteReader,
+// the decompressor may read more data than necessary from r.
// It is the caller's responsibility to call Close on the ReadCloser when
// finished reading.
// The number of bits to use for literal codes, litWidth, must be in the