diff options
Diffstat (limited to 'src/bytes/buffer.go')
| -rw-r--r-- | src/bytes/buffer.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/bytes/buffer.go b/src/bytes/buffer.go index 099e431a36..a99e64d1e8 100644 --- a/src/bytes/buffer.go +++ b/src/bytes/buffer.go @@ -41,6 +41,7 @@ const ( // ErrTooLarge is passed to panic if memory cannot be allocated to store data in a buffer. var ErrTooLarge = errors.New("bytes.Buffer: too large") +var errNegativeRead = errors.New("bytes.Buffer: reader returned negative count from Read") const maxInt = int(^uint(0) >> 1) @@ -198,6 +199,10 @@ func (b *Buffer) ReadFrom(r io.Reader) (n int64, err error) { for { i := b.grow(MinRead) m, e := r.Read(b.buf[i:cap(b.buf)]) + if m < 0 { + panic(errNegativeRead) + } + b.buf = b.buf[:i+m] n += int64(m) if e == io.EOF { |