[INFO] fetching crate yagenerator 0.1.3...
[INFO] checking yagenerator-0.1.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate yagenerator 0.1.3 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate yagenerator 0.1.3 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 yagenerator 0.1.3
[INFO] finished tweaking crates.io crate yagenerator 0.1.3
[INFO] tweaked toml for crates.io crate yagenerator 0.1.3 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate yagenerator 0.1.3 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.117
[INFO] [stderr]   Downloaded hermit-abi v0.1.17
[INFO] [stderr]   Downloaded serde v1.0.117
[INFO] [stderr]   Downloaded dtoa v0.4.6
[INFO] [stderr]   Downloaded linked-hash-map v0.5.3
[INFO] [stderr]   Downloaded serde_json v1.0.59
[INFO] [stderr]   Downloaded syn v1.0.45
[INFO] [stderr]   Downloaded yaml-rust v0.4.4
[INFO] [stderr]   Downloaded serde_yaml v0.8.14
[INFO] [stderr]   Downloaded itoa v0.4.6
[INFO] [stderr]   Downloaded tinytemplate v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 8e9dc3f73c71376fe9201b297b9e0466e1b0635931f1c572db9eae63255980f1
[INFO] running `Command { std: "docker" "start" "-a" "8e9dc3f73c71376fe9201b297b9e0466e1b0635931f1c572db9eae63255980f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e9dc3f73c71376fe9201b297b9e0466e1b0635931f1c572db9eae63255980f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e9dc3f73c71376fe9201b297b9e0466e1b0635931f1c572db9eae63255980f1", kill_on_drop: false }`
[INFO] [stdout] 8e9dc3f73c71376fe9201b297b9e0466e1b0635931f1c572db9eae63255980f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 5b3fd5fe9bdadf0c8a7c84ce1d49bd1648e0e931f3b695318e4258b8ce140fdd
[INFO] running `Command { std: "docker" "start" "-a" "5b3fd5fe9bdadf0c8a7c84ce1d49bd1648e0e931f3b695318e4258b8ce140fdd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking Inflector v0.11.4
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking serde_yaml v0.8.14
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking yagenerator v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde_yaml` is imported redundantly
[INFO] [stdout]  --> src/types.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_yaml;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serde_yaml` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]  --> src/formatters.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_yaml` is imported redundantly
[INFO] [stdout]  --> src/types.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_yaml;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serde_yaml` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]  --> src/formatters.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[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] [stdout] warning: the item `yagenerator` is imported redundantly
[INFO] [stdout]  --> tests/integration_test.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use yagenerator;
[INFO] [stdout]   |         ^^^^^^^^^^^ the item `yagenerator` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.73s
[INFO] running `Command { std: "docker" "inspect" "5b3fd5fe9bdadf0c8a7c84ce1d49bd1648e0e931f3b695318e4258b8ce140fdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b3fd5fe9bdadf0c8a7c84ce1d49bd1648e0e931f3b695318e4258b8ce140fdd", kill_on_drop: false }`
[INFO] [stdout] 5b3fd5fe9bdadf0c8a7c84ce1d49bd1648e0e931f3b695318e4258b8ce140fdd
[INFO] checking yagenerator-0.1.3 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate yagenerator 0.1.3 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate yagenerator 0.1.3 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 yagenerator 0.1.3
[INFO] finished tweaking crates.io crate yagenerator 0.1.3
[INFO] tweaked toml for crates.io crate yagenerator 0.1.3 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate yagenerator 0.1.3 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 8a45623d687016888cfba24484d0b750f27443c43e58db2aab4b031afa685ce0
[INFO] running `Command { std: "docker" "start" "-a" "8a45623d687016888cfba24484d0b750f27443c43e58db2aab4b031afa685ce0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a45623d687016888cfba24484d0b750f27443c43e58db2aab4b031afa685ce0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a45623d687016888cfba24484d0b750f27443c43e58db2aab4b031afa685ce0", kill_on_drop: false }`
[INFO] [stdout] 8a45623d687016888cfba24484d0b750f27443c43e58db2aab4b031afa685ce0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 0196a098950d60d65e011d94da76801b38c392310525362fcb02266010415230
[INFO] running `Command { std: "docker" "start" "-a" "0196a098950d60d65e011d94da76801b38c392310525362fcb02266010415230", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]     Checking Inflector v0.11.4
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking serde_yaml v0.8.14
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking yagenerator v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde_yaml` is imported redundantly
[INFO] [stdout]  --> src/types.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_yaml;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serde_yaml` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]  --> src/formatters.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_yaml` is imported redundantly
[INFO] [stdout]  --> src/types.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_yaml;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serde_yaml` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]  --> src/formatters.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[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] [stdout] warning: the item `yagenerator` is imported redundantly
[INFO] [stdout]  --> tests/integration_test.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use yagenerator;
[INFO] [stdout]   |         ^^^^^^^^^^^ the item `yagenerator` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.69s
[INFO] running `Command { std: "docker" "inspect" "0196a098950d60d65e011d94da76801b38c392310525362fcb02266010415230", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0196a098950d60d65e011d94da76801b38c392310525362fcb02266010415230", kill_on_drop: false }`
[INFO] [stdout] 0196a098950d60d65e011d94da76801b38c392310525362fcb02266010415230