[INFO] fetching crate mail-smtp 0.3.0...
[INFO] checking mail-smtp-0.3.0 against beta for pr-78714
[INFO] extracting crate mail-smtp 0.3.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate mail-smtp 0.3.0 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 crates.io crate mail-smtp 0.3.0
[INFO] finished tweaking crates.io crate mail-smtp 0.3.0
[INFO] tweaked toml for crates.io crate mail-smtp 0.3.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 795dbc017c33c05c00b4048366d26b4e01d58e4ec3cc2bc075abfafee090dc7d
[INFO] running `Command { std: "docker" "start" "-a" "795dbc017c33c05c00b4048366d26b4e01d58e4ec3cc2bc075abfafee090dc7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "795dbc017c33c05c00b4048366d26b4e01d58e4ec3cc2bc075abfafee090dc7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "795dbc017c33c05c00b4048366d26b4e01d58e4ec3cc2bc075abfafee090dc7d", kill_on_drop: false }`
[INFO] [stdout] 795dbc017c33c05c00b4048366d26b4e01d58e4ec3cc2bc075abfafee090dc7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 5ab9827908c2dd5cc5d006f38e1a281d1338306cc49f14ea9d87e7b071d0fdc0
[INFO] running `Command { std: "docker" "start" "-a" "5ab9827908c2dd5cc5d006f38e1a281d1338306cc49f14ea9d87e7b071d0fdc0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling native-tls v0.2.6
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking vec1 v1.6.0
[INFO] [stderr]     Checking soft-ascii-string v1.1.0
[INFO] [stderr]    Compiling checked_command v0.2.2
[INFO] [stderr]     Checking vec-drain-where v1.0.1
[INFO] [stderr]     Checking quoted_printable v0.4.2
[INFO] [stderr]     Checking lut v0.1.0-unstable
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking unicode-normalization v0.1.14
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking net2 v0.2.35
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking openssl-sys v0.9.58
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking total-order-multi-map v0.4.6
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking backtrace v0.3.54
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking media-type-impl-utils v0.3.0-unstable
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking media-type v0.4.0-unstable
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking openssl v0.10.30
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-tls v0.2.1
[INFO] [stderr]     Checking new-tokio-smtp v0.9.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking mail-internals v0.2.3
[INFO] [stderr]     Checking mail-headers v0.6.6
[INFO] [stderr]     Checking mail-core v0.6.2
[INFO] [stderr]     Checking mail-smtp v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.71s
[INFO] running `Command { std: "docker" "inspect" "5ab9827908c2dd5cc5d006f38e1a281d1338306cc49f14ea9d87e7b071d0fdc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ab9827908c2dd5cc5d006f38e1a281d1338306cc49f14ea9d87e7b071d0fdc0", kill_on_drop: false }`
[INFO] [stdout] 5ab9827908c2dd5cc5d006f38e1a281d1338306cc49f14ea9d87e7b071d0fdc0