Rust 1.18 regression, cargo-update-0.8.0

[brson]

https://github.com/nabijaczleweli/cargo-update

brian@ip-10-145-43-250:~/dev/cargo-update⟫ git log -1
commit 90b796ccb5e9b39226542b3199753c0fb44ec52a
Author: nabijaczleweli <nabijaczleweli@gmail.com>
Date:   Sat Mar 25 20:40:43 2017 +0100

    Bump version to 0.8.0

brian@ip-10-145-43-250:/mnt2/dev⟫ rustc +beta -Vv
rustc 1.18.0-beta.1 (4dce67253 2017-04-25)
binary: rustc
commit-hash: 4dce67253d67785c74c8d270c38d774edd0deed8
commit-date: 2017-04-25
host: x86_64-unknown-linux-gnu
release: 1.18.0-beta.1
LLVM version: 3.9

brian@ip-10-145-43-250:~/dev/cargo-update⟫ cargo +beta test
   Compiling cargo-update v0.8.0 (file:///mnt2/dev/cargo-update)
error: couldn't read "src/bin/cargo-install-update.rs": No such file or directory (os error 2)

error: Could not compile `cargo-update`.

To learn more, run the command again with --verbose.

cc @nabijaczleweli @alexcrichton

[nabijaczleweli]

I can tell you right now that this is an issue I've encountered before, in that the default main file changed from src/main.rs to src/bin/$EXEC_NAME.rs. Dunno why when though.

[brson]

Closing in favor of #41797