[INFO] fetching crate lettre_email 0.9.4...
[INFO] checking lettre_email-0.9.4 against 1.55.0 for beta-1.56-3
[INFO] extracting crate lettre_email 0.9.4 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate lettre_email 0.9.4 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lettre_email 0.9.4
[INFO] finished tweaking crates.io crate lettre_email 0.9.4
[INFO] tweaked toml for crates.io crate lettre_email 0.9.4 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate lettre_email 0.9.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 15735caff321229a06ea15c5a72cb48588d1ec0d44f977181da37dab13a59e28
[INFO] running `Command { std: "docker" "start" "-a" "15735caff321229a06ea15c5a72cb48588d1ec0d44f977181da37dab13a59e28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15735caff321229a06ea15c5a72cb48588d1ec0d44f977181da37dab13a59e28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15735caff321229a06ea15c5a72cb48588d1ec0d44f977181da37dab13a59e28", kill_on_drop: false }`
[INFO] [stdout] 15735caff321229a06ea15c5a72cb48588d1ec0d44f977181da37dab13a59e28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60e0272c1d5726304bfbc2690e1059abcd717b7dbcbbac712822ca2a350da263
[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" "60e0272c1d5726304bfbc2690e1059abcd717b7dbcbbac712822ca2a350da263", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]     Checking ascii_utils v0.9.3
[INFO] [stderr]     Checking bufstream v0.1.4
[INFO] [stderr]    Compiling openssl-sys v0.9.55
[INFO] [stderr]    Compiling email v0.0.20
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking fast_chemail v0.9.6
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]    Compiling openssl v0.10.29
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking lettre v0.9.3
[INFO] [stderr]     Checking lettre_email v0.9.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> tests/skeptic.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         format!("Failed to run rustdoc tests on {:?}!", path)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the assert!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 47 |         "Failed to run rustdoc tests on {:?}!", path
[INFO] [stdout]    |        --                                          --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.21s
[INFO] running `Command { std: "docker" "inspect" "60e0272c1d5726304bfbc2690e1059abcd717b7dbcbbac712822ca2a350da263", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60e0272c1d5726304bfbc2690e1059abcd717b7dbcbbac712822ca2a350da263", kill_on_drop: false }`
[INFO] [stdout] 60e0272c1d5726304bfbc2690e1059abcd717b7dbcbbac712822ca2a350da263
