Auto merge of #127706 - workingjubilee:rollup-d07ij30, r=workingjubilee · model-checking/verify-rust-std@e122949 (original) (raw)

`@@ -3,7 +3,7 @@ use crate::fmt;

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`use crate::io::{

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`self, ErrorKind, IntoInnerError, IoSlice, Seek, SeekFrom, Write, DEFAULT_BUF_SIZE,

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`};

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use crate::mem;

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use crate::mem::{self, ManuallyDrop};

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`use crate::ptr;

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`/// Wraps a writer and buffers its output.

`@@ -164,13 +164,13 @@ impl<W: Write> BufWriter {

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`/// assert_eq!(&buffered_data.unwrap(), b"ata");

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```` /// ```

````

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`#[stable(feature = "bufwriter_into_parts", since = "1.56.0")]

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pub fn into_parts(mut self) -> (W, Result<Vec, WriterPanicked>) {

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let buf = mem::take(&mut self.buf);

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let buf = if !self.panicked { Ok(buf) } else { Err(WriterPanicked { buf }) };

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pub fn into_parts(self) -> (W, Result<Vec, WriterPanicked>) {

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let mut this = ManuallyDrop::new(self);

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let buf = mem::take(&mut this.buf);

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let buf = if !this.panicked { Ok(buf) } else { Err(WriterPanicked { buf }) };

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// SAFETY: forget(self) prevents double dropping inner

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let inner = unsafe { ptr::read(&self.inner) };

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mem::forget(self);

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`` +

// SAFETY: double-drops are prevented by putting this in a ManuallyDrop that is never dropped

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let inner = unsafe { ptr::read(&this.inner) };

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`(inner, buf)

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