[INFO] cloning repository https://github.com/BurntSushi/rust-cmail
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BurntSushi/rust-cmail" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Frust-cmail", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Frust-cmail'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 64ff384418099dc824f93488876b9503791e327e
[INFO] checking BurntSushi/rust-cmail against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Frust-cmail" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BurntSushi/rust-cmail 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/BurntSushi/rust-cmail
[INFO] finished tweaking git repo https://github.com/BurntSushi/rust-cmail
[INFO] tweaked toml for git repo https://github.com/BurntSushi/rust-cmail written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/BurntSushi/rust-cmail 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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] f5581b38045f7c5e96aa6eb28869c368fc41aa6dfede68c57e72c0c7129d0fb7
[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" "f5581b38045f7c5e96aa6eb28869c368fc41aa6dfede68c57e72c0c7129d0fb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5581b38045f7c5e96aa6eb28869c368fc41aa6dfede68c57e72c0c7129d0fb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5581b38045f7c5e96aa6eb28869c368fc41aa6dfede68c57e72c0c7129d0fb7", kill_on_drop: false }`
[INFO] [stdout] f5581b38045f7c5e96aa6eb28869c368fc41aa6dfede68c57e72c0c7129d0fb7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 6721b656c196a56810d324585391f54f560d4bd23ea36d27182cec45b2878354
[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" "6721b656c196a56810d324585391f54f560d4bd23ea36d27182cec45b2878354", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking stable_deref_trait v1.1.0
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking crossbeam-utils v0.4.1
[INFO] [stderr]     Checking cfg-if v0.1.4
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking arc-swap v0.2.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr]     Checking smallvec v0.6.3
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]    Compiling quote v0.6.4
[INFO] [stderr]    Compiling syn v0.14.5
[INFO] [stderr]     Checking crossbeam-epoch v0.5.1
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]     Checking signal-hook v0.1.2
[INFO] [stderr]     Checking aho-corasick v0.6.6
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking parking_lot v0.5.5
[INFO] [stderr]     Checking crossbeam-channel v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]     Checking docopt v1.0.0
[INFO] [stderr]     Checking cmail v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> cmail.rs:50:47
[INFO] [stdout]    |
[INFO] [stdout] 50 | type Result<T> = ::std::result::Result<T, Box<Error + Send + Sync>>;
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Error + Send + Sync`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> cmail.rs:369:25
[INFO] [stdout]     |
[INFO] [stdout] 369 |     fn wtr(self) -> Box<io::Write> {
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> cmail.rs:50:47
[INFO] [stdout]    |
[INFO] [stdout] 50 | type Result<T> = ::std::result::Result<T, Box<Error + Send + Sync>>;
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Error + Send + Sync`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> cmail.rs:369:25
[INFO] [stdout]     |
[INFO] [stdout] 369 |     fn wtr(self) -> Box<io::Write> {
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn io::Write`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.05s
[INFO] running `Command { std: "docker" "inspect" "6721b656c196a56810d324585391f54f560d4bd23ea36d27182cec45b2878354", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6721b656c196a56810d324585391f54f560d4bd23ea36d27182cec45b2878354", kill_on_drop: false }`
[INFO] [stdout] 6721b656c196a56810d324585391f54f560d4bd23ea36d27182cec45b2878354