Auto merge of #57714 - matthewjasper:wellformed-unreachable, r=pnkfelix

[rust.git] / src / libcore / fmt / float.rs

diff --git a/src/libcore/fmt/float.rs b/src/libcore/fmt/float.rs
index d01cd012031db45cbb99f4d51c008d8eba174fc1..20c626cef1b160b1d46fe516d3fdbf7a465daed7 100644 (file)
--- a/src/libcore/fmt/float.rs
+++ b/src/libcore/fmt/float.rs
@@ -1,13 +1,3 @@
-// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
 use fmt::{Formatter, Result, LowerExp, UpperExp, Display, Debug};
 use mem::MaybeUninit;
 use num::flt2dec;
@@ -22,6 +12,9 @@ fn float_to_decimal_common_exact<T>(fmt: &mut Formatter, num: &T,
     unsafe {
         let mut buf = MaybeUninit::<[u8; 1024]>::uninitialized(); // enough for f32 and f64
         let mut parts = MaybeUninit::<[flt2dec::Part; 4]>::uninitialized();
+        // FIXME(#53491): Technically, this is calling `get_mut` on an uninitialized
+        // `MaybeUninit` (here and elsewhere in this file).  Revisit this once
+        // we decided whether that is valid or not.
         let formatted = flt2dec::to_exact_fixed_str(flt2dec::strategy::grisu::format_exact,
                                                     *num, sign, precision,
                                                     false, buf.get_mut(), parts.get_mut());