[INFO] fetching crate maildir 0.6.4...
[INFO] checking maildir-0.6.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate maildir 0.6.4 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate maildir 0.6.4 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate maildir 0.6.4
[INFO] finished tweaking crates.io crate maildir 0.6.4
[INFO] tweaked toml for crates.io crate maildir 0.6.4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate maildir 0.6.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quoted_printable v0.4.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d25790c5db0495cd1d497fd250bdb4498458393648113ac5c94e4ccf47fe20c
[INFO] running `Command { std: "docker" "start" "-a" "7d25790c5db0495cd1d497fd250bdb4498458393648113ac5c94e4ccf47fe20c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d25790c5db0495cd1d497fd250bdb4498458393648113ac5c94e4ccf47fe20c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d25790c5db0495cd1d497fd250bdb4498458393648113ac5c94e4ccf47fe20c", kill_on_drop: false }`
[INFO] [stdout] 7d25790c5db0495cd1d497fd250bdb4498458393648113ac5c94e4ccf47fe20c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f6c43d7f3c8d3dd5a8b817e27894fb718c035d573b8a742ed66ecacc93b5680c
[INFO] running `Command { std: "docker" "start" "-a" "f6c43d7f3c8d3dd5a8b817e27894fb718c035d573b8a742ed66ecacc93b5680c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]     Checking quoted_printable v0.4.7
[INFO] [stderr]     Checking data-encoding v2.3.3
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking encoding_rs v0.8.32
[INFO] [stderr]     Checking walkdir v2.2.9
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking gethostname v0.2.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking charset v0.1.3
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking mailparse v0.14.0
[INFO] [stderr]     Checking maildir v0.6.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.62s
[INFO] running `Command { std: "docker" "inspect" "f6c43d7f3c8d3dd5a8b817e27894fb718c035d573b8a742ed66ecacc93b5680c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6c43d7f3c8d3dd5a8b817e27894fb718c035d573b8a742ed66ecacc93b5680c", kill_on_drop: false }`
[INFO] [stdout] f6c43d7f3c8d3dd5a8b817e27894fb718c035d573b8a742ed66ecacc93b5680c
[INFO] checking maildir-0.6.4 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate maildir 0.6.4 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate maildir 0.6.4 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate maildir 0.6.4
[INFO] finished tweaking crates.io crate maildir 0.6.4
[INFO] tweaked toml for crates.io crate maildir 0.6.4 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate crates.io crate maildir 0.6.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db1011cfe897e5165fb537101bc5fa0529cd5fafaea0b19e0600ad8e5a5906fb
[INFO] running `Command { std: "docker" "start" "-a" "db1011cfe897e5165fb537101bc5fa0529cd5fafaea0b19e0600ad8e5a5906fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db1011cfe897e5165fb537101bc5fa0529cd5fafaea0b19e0600ad8e5a5906fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db1011cfe897e5165fb537101bc5fa0529cd5fafaea0b19e0600ad8e5a5906fb", kill_on_drop: false }`
[INFO] [stdout] db1011cfe897e5165fb537101bc5fa0529cd5fafaea0b19e0600ad8e5a5906fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b682cb25baa9c85266fa05cee9bbc36b61047fcb51e2a0bf2ebeb6a590a4e625
[INFO] running `Command { std: "docker" "start" "-a" "b682cb25baa9c85266fa05cee9bbc36b61047fcb51e2a0bf2ebeb6a590a4e625", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]     Checking data-encoding v2.3.3
[INFO] [stderr]     Checking quoted_printable v0.4.7
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking encoding_rs v0.8.32
[INFO] [stderr]     Checking walkdir v2.2.9
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking gethostname v0.2.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking charset v0.1.3
[INFO] [stderr]     Checking mailparse v0.14.0
[INFO] [stderr]     Checking maildir v0.6.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.84s
[INFO] running `Command { std: "docker" "inspect" "b682cb25baa9c85266fa05cee9bbc36b61047fcb51e2a0bf2ebeb6a590a4e625", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b682cb25baa9c85266fa05cee9bbc36b61047fcb51e2a0bf2ebeb6a590a4e625", kill_on_drop: false }`
[INFO] [stdout] b682cb25baa9c85266fa05cee9bbc36b61047fcb51e2a0bf2ebeb6a590a4e625