[INFO] cloning repository https://github.com/carribus/rust_commander
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/carribus/rust_commander" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcarribus%2Frust_commander", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcarribus%2Frust_commander'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 22c4b2d9f0ba6add0eaeb0ff89ea6392adcb665b
[INFO] checking carribus/rust_commander against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcarribus%2Frust_commander" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/carribus/rust_commander on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/carribus/rust_commander
[INFO] finished tweaking git repo https://github.com/carribus/rust_commander
[INFO] tweaked toml for git repo https://github.com/carribus/rust_commander written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/carribus/rust_commander already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2c8c2a0f1cbf180d7ae5e3b5440649ac5eaf985df89c238c091bda9d194c73d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f2c8c2a0f1cbf180d7ae5e3b5440649ac5eaf985df89c238c091bda9d194c73d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2c8c2a0f1cbf180d7ae5e3b5440649ac5eaf985df89c238c091bda9d194c73d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2c8c2a0f1cbf180d7ae5e3b5440649ac5eaf985df89c238c091bda9d194c73d", kill_on_drop: false }`
[INFO] [stdout] f2c8c2a0f1cbf180d7ae5e3b5440649ac5eaf985df89c238c091bda9d194c73d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b38821b59e1e7b9928a9d65564ab1c34fa73f14bfd143099357494997bde748f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b38821b59e1e7b9928a9d65564ab1c34fa73f14bfd143099357494997bde748f", kill_on_drop: false }`
[INFO] [stderr]     Checking commander v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `self.args` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:284:25
[INFO] [stdout]     |
[INFO] [stdout] 264 |                 let o = self.get_supported_option(value, longform);
[INFO] [stdout]     |                         ---- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 284 |                         self.args.insert(option.shortform.to_string(), CmdArgument { 
[INFO] [stdout]     |                         ^^^^^^^^^        ---------------- immutable borrow later used here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         mutable borrow occurs here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `self.args` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:284:25
[INFO] [stdout]     |
[INFO] [stdout] 264 |                 let o = self.get_supported_option(value, longform);
[INFO] [stdout]     |                         ---- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 284 |                         self.args.insert(option.shortform.to_string(), CmdArgument { 
[INFO] [stdout]     |                         ^^^^^^^^^        ---------------- immutable borrow later used here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         mutable borrow occurs here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "b38821b59e1e7b9928a9d65564ab1c34fa73f14bfd143099357494997bde748f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b38821b59e1e7b9928a9d65564ab1c34fa73f14bfd143099357494997bde748f", kill_on_drop: false }`
[INFO] [stdout] b38821b59e1e7b9928a9d65564ab1c34fa73f14bfd143099357494997bde748f