diff -ur cargo-0.26.0.orig/src/cargo/core/features.rs cargo-0.26.0/src/cargo/core/features.rs
--- cargo-0.26.0.orig/src/cargo/core/features.rs	2018-02-26 22:17:55.000000000 +0100
+++ cargo-0.26.0/src/cargo/core/features.rs	2019-09-21 22:39:56.881000000 +0200
@@ -132,17 +132,17 @@
     (unstable) => (Status::Unstable);
 }
 
-/// A listing of all features in Cargo
-///
-/// "look here"
-///
-/// This is the macro that lists all stable and unstable features in Cargo.
-/// You'll want to add to this macro whenever you add a feature to Cargo, also
-/// following the directions above.
-///
-/// Note that all feature names here are valid Rust identifiers, but the `_`
-/// character is translated to `-` when specified in the `cargo-features`
-/// manifest entry in `Cargo.toml`.
+// A listing of all features in Cargo
+//
+// "look here"
+//
+// This is the macro that lists all stable and unstable features in Cargo.
+// You'll want to add to this macro whenever you add a feature to Cargo, also
+// following the directions above.
+//
+// Note that all feature names here are valid Rust identifiers, but the `_`
+// character is translated to `-` when specified in the `cargo-features`
+// manifest entry in `Cargo.toml`.
 features! {
     pub struct Features {
 
diff -ur cargo-0.26.0.orig/src/cargo/util/errors.rs cargo-0.26.0/src/cargo/util/errors.rs
--- cargo-0.26.0.orig/src/cargo/util/errors.rs	2018-02-26 22:17:55.000000000 +0100
+++ cargo-0.26.0/src/cargo/util/errors.rs	2019-09-21 22:18:35.758000000 +0200
@@ -199,7 +199,6 @@
     #[cfg(unix)]
     fn status_to_string(status: &ExitStatus) -> String {
         use std::os::unix::process::*;
-        use libc;
 
         if let Some(signal) = status.signal() {
             let name = match signal as libc::c_int {
diff -ur cargo-0.26.0.orig/src/cargo/util/paths.rs cargo-0.26.0/src/cargo/util/paths.rs
--- cargo-0.26.0.orig/src/cargo/util/paths.rs	2018-02-26 22:17:55.000000000 +0100
+++ cargo-0.26.0/src/cargo/util/paths.rs	2019-09-21 22:23:14.922000000 +0200
@@ -138,7 +138,6 @@
 #[cfg(unix)]
 pub fn bytes2path(bytes: &[u8]) -> CargoResult<PathBuf> {
     use std::os::unix::prelude::*;
-    use std::ffi::OsStr;
     Ok(PathBuf::from(OsStr::from_bytes(bytes)))
 }
 #[cfg(windows)]
--- cargo-0.26.0/src/cargo/core/workspace.rs~	2018-02-26 22:17:55.000000000 +0100
+++ cargo-0.26.0/src/cargo/core/workspace.rs	2021-09-04 09:03:27.740002413 +0200
@@ -317,7 +317,7 @@
                 .join("Cargo.toml");
             debug!("find_root - pointer {}", path.display());
             Ok(paths::normalize_path(&path))
-        };
+        }
 
         {
             let current = self.packages.load(manifest_path)?;
--- cargo-0.26.0/src/cargo/sources/git/utils.rs~	2018-02-26 22:17:55.000000000 +0100
+++ cargo-0.26.0/src/cargo/sources/git/utils.rs	2021-09-04 21:05:51.040004490 +0200
@@ -1,7 +1,6 @@
 use std::env;
 use std::fmt;
 use std::fs::{self, File};
-use std::mem;
 use std::path::{Path, PathBuf};
 use std::process::Command;
 
@@ -695,7 +695,7 @@
                    String::from_utf8_lossy(&out.stderr));
             if out.status.success() {
                 let new = git2::Repository::open(repo.path())?;
-                mem::replace(repo, new);
+                *repo = new;
                 return Ok(())
             }
         }
@@ -710,7 +710,7 @@
     // the `tmp` folder we allocated.
     let path = repo.path().to_path_buf();
     let tmp = path.join("tmp");
-    mem::replace(repo, git2::Repository::init(&tmp)?);
+    *repo = git2::Repository::init(&tmp)?;
     for entry in path.read_dir()? {
         let entry = entry?;
         if entry.file_name().to_str() == Some("tmp") {
@@ -720,9 +720,9 @@
         drop(fs::remove_file(&path).or_else(|_| fs::remove_dir_all(&path)));
     }
     if repo.is_bare() {
-        mem::replace(repo, git2::Repository::init_bare(path)?);
+        *repo = git2::Repository::init_bare(path)?;
     } else {
-        mem::replace(repo, git2::Repository::init(path)?);
+        *repo = git2::Repository::init(path)?;
     }
     fs::remove_dir_all(&tmp).chain_err(|| {
         format!("failed to remove {:?}", tmp)