Auto merge of #69534 - Dylan-DPC:rollup-fwa2lip, r=Dylan-DPC

Rollup of 9 pull requests

Successful merges:

 - #69379 (Fail on multiple declarations of `main`.)
 - #69430 (librustc_typeck: remove loop that never actually loops)
 - #69449 (Do not ping PR reviewers in toolstate breakage)
 - #69491 (rustc_span: Add `Symbol::to_ident_string` for use in diagnostic messages)
 - #69495 (don't take redundant references to operands)
 - #69496 (use find(x) instead of filter(x).next())
 - #69501 (note that find(f) is equivalent to filter(f).next() in the docs.)
 - #69527 (Ignore untracked paths when running `rustfmt` on repository.)
 - #69529 (don't use .into() to convert types into identical types.)

Failed merges:

r? @ghost

1 files changed, 1 insertions, 3 deletions

diff --git a/src/libstd/sys/unix/process/process_common.rs b/src/libstd/sys/unix/process/process_common.rs
index e66d6fdc56a..83f052c898b 100644
--- a/src/libstd/sys/unix/process/process_common.rs
+++ b/src/libstd/sys/unix/process/process_common.rs
@@ -287,9 +287,7 @@ impl CStringArray {
 
 fn construct_envp(env: BTreeMap<OsString, OsString>, saw_nul: &mut bool) -> CStringArray {
     let mut result = CStringArray::with_capacity(env.len());
-    for (k, v) in env {
-        let mut k: OsString = k.into();
-
+    for (mut k, v) in env {
         // Reserve additional space for '=' and null terminator
         k.reserve_exact(v.len() + 2);
         k.push("=");