collapsible_match ignore "else" when fixing an if statement

Summary

The fix proposed by the lint drops the else statement.

Reproducer

Code is from https://github.com/jaemk/self_update/blob/cad8bb9c5efa64ff9131c424bcd20c84463b32f2/src/lib.rs#L591-L614

Code:

        match self.temp {
            None => {
                fs::rename(self.source, dest)?;
            }
            Some(temp) => {
                if dest.exists() {
                    // Move the existing dest to a temp location so we can move it
                    // back it there's an error. If the existing `dest` file is a
                    // long running program, this may prevent the temp dir from
                    // being cleaned up.
                    fs::rename(dest, temp)?;
                    if let Err(e) = fs::rename(self.source, dest) {
                        fs::rename(temp, dest)?;
                        return Err(Error::from(e));
                    }
                } else {
                    fs::rename(self.source, dest)?;
                }
            }
        };

Current fix:

        match self.temp {
            None => {
                fs::rename(self.source, dest)?;
            }
            Some(temp)
                if dest.exists() => {
                    // Move the existing dest to a temp location so we can move it
                    // back it there's an error. If the existing `dest` file is a
                    // long running program, this may prevent the temp dir from
                    // being cleaned up.
                    fs::rename(dest, temp)?;
                    if let Err(e) = fs::rename(self.source, dest) {
                        fs::rename(temp, dest)?;
                        return Err(Error::from(e));
                    }
                }
        };

Desired output:

The lint should either not report this or propose a fix that also includes the else statement.

Version

rustc 1.95.0 (59807616e 2026-04-14)
binary: rustc
commit-hash: 59807616e1fa2540724bfbac14d7976d7e4a3860
commit-date: 2026-04-14
host: x86_64-unknown-linux-gnu
release: 1.95.0
LLVM version: 22.1.2

Additional Labels

No response