[INFO] fetching crate cargo-msrv 0.2.1...
[INFO] checking cargo-msrv-0.2.1 against try#9c1dcf141bc0875407c4eb36972857bd3db713e2 for pr-81863
[INFO] extracting crate cargo-msrv 0.2.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate cargo-msrv 0.2.1 on toolchain 9c1dcf141bc0875407c4eb36972857bd3db713e2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-msrv 0.2.1
[INFO] finished tweaking crates.io crate cargo-msrv 0.2.1
[INFO] tweaked toml for crates.io crate cargo-msrv 0.2.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate cargo-msrv 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded attohttpc v0.16.1
[INFO] [stderr]   Downloaded wildmatch v1.0.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "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] d3a22468e883cce665e98b1a58f29011030e2fcf51a765d0b291c89c5c9c762f
[INFO] running `Command { std: "docker" "start" "-a" "d3a22468e883cce665e98b1a58f29011030e2fcf51a765d0b291c89c5c9c762f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3a22468e883cce665e98b1a58f29011030e2fcf51a765d0b291c89c5c9c762f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3a22468e883cce665e98b1a58f29011030e2fcf51a765d0b291c89c5c9c762f", kill_on_drop: false }`
[INFO] [stdout] d3a22468e883cce665e98b1a58f29011030e2fcf51a765d0b291c89c5c9c762f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "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] fe6e24f91dcc92a32bfe6fd453bd5deae35c1eeb45f605998c4d89c2389f6f5f
[INFO] running `Command { std: "docker" "start" "-a" "fe6e24f91dcc92a32bfe6fd453bd5deae35c1eeb45f605998c4d89c2389f6f5f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling log v0.4.13
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling openssl v0.10.32
[INFO] [stderr]    Compiling serde_derive v1.0.119
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]    Compiling serde v1.0.119
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking wildmatch v1.0.13
[INFO] [stderr]     Checking tinyvec v1.1.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking thread_local v1.1.0
[INFO] [stderr]     Checking form_urlencoded v1.0.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]     Checking http v0.2.3
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking openssl-sys v0.9.60
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking flate2 v1.0.19
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking directories v3.0.1
[INFO] [stderr]     Checking unicode-normalization v0.1.16
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking url v2.2.0
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]     Checking attohttpc v0.16.1
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking cargo-msrv v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.95s
[INFO] running `Command { std: "docker" "inspect" "fe6e24f91dcc92a32bfe6fd453bd5deae35c1eeb45f605998c4d89c2389f6f5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe6e24f91dcc92a32bfe6fd453bd5deae35c1eeb45f605998c4d89c2389f6f5f", kill_on_drop: false }`
[INFO] [stdout] fe6e24f91dcc92a32bfe6fd453bd5deae35c1eeb45f605998c4d89c2389f6f5f