Rollup merge of #139068 - a1phyr:less_uninit, r=joboet

io: Avoid marking some bytes as uninit

These bytes were marked as uninit, which would cause them to be initialized multiple times even though it was not necessary.

1 files changed, 0 insertions, 1 deletions

diff --git a/library/std/src/io/buffered/bufreader/buffer.rs b/library/std/src/io/buffered/bufreader/buffer.rs
index 9fd2472ebdf..574288e579e 100644
--- a/library/std/src/io/buffered/bufreader/buffer.rs
+++ b/library/std/src/io/buffered/bufreader/buffer.rs
@@ -123,7 +123,6 @@ impl Buffer {
     /// Remove bytes that have already been read from the buffer.
     pub fn backshift(&mut self) {
         self.buf.copy_within(self.pos.., 0);
-        self.initialized -= self.pos;
         self.filled -= self.pos;
         self.pos = 0;
     }