[INFO] fetching crate licensor 2.1.0...
[INFO] checking licensor-2.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate licensor 2.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate licensor 2.1.0 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 licensor 2.1.0
[INFO] finished tweaking crates.io crate licensor 2.1.0
[INFO] tweaked toml for crates.io crate licensor 2.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate licensor 2.1.0 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.6
[INFO] [stderr]   Downloaded proc-macro-error v0.2.6
[INFO] [stderr]   Downloaded structopt-derive v0.3.5
[INFO] [stderr]   Downloaded unicode-width v0.1.6
[INFO] [stderr]   Downloaded atty v0.2.13
[INFO] [stderr]   Downloaded structopt v0.3.5
[INFO] [stderr]   Downloaded escargot v0.4.0
[INFO] [stderr]   Downloaded assert_cmd v0.11.1
[INFO] [stderr]   Downloaded calmio_filters v0.1.0
[INFO] [stderr]   Downloaded serde_derive v1.0.102
[INFO] [stderr]   Downloaded serde v1.0.102
[INFO] [stderr]   Downloaded serde_json v1.0.41
[INFO] [stderr]   Downloaded chrono v0.4.9
[INFO] [stderr]   Downloaded regex-syntax v0.6.12
[INFO] [stderr]   Downloaded libc v0.2.65
[INFO] [stderr]   Downloaded regex v1.3.1
[INFO] [stderr]   Downloaded syn v1.0.8
[INFO] [stderr]   Downloaded aho-corasick v0.7.6
[INFO] [stderr]   Downloaded miniz_oxide v0.3.5
[INFO] [stderr]   Downloaded flate2 v1.0.13
[INFO] [stderr]   Downloaded autocfg v0.1.7
[INFO] [stderr]   Downloaded calm_io v0.1.1
[INFO] [stderr]   Downloaded cargo-husky v1.4.0
[INFO] [stderr]   Downloaded num-traits v0.2.10
[INFO] [stderr]   Downloaded memchr v2.2.1
[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] 4df54edb7987b995fd2919c3b8a381f0b3a8a450f818ff834770ad3e4f742467
[INFO] running `Command { std: "docker" "start" "-a" "4df54edb7987b995fd2919c3b8a381f0b3a8a450f818ff834770ad3e4f742467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4df54edb7987b995fd2919c3b8a381f0b3a8a450f818ff834770ad3e4f742467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4df54edb7987b995fd2919c3b8a381f0b3a8a450f818ff834770ad3e4f742467", kill_on_drop: false }`
[INFO] [stdout] 4df54edb7987b995fd2919c3b8a381f0b3a8a450f818ff834770ad3e4f742467
[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] 14f56c124b5d3b17f4a8c3886ca7866ed122d9ff5d1434a57de7e96924595d2c
[INFO] running `Command { std: "docker" "start" "-a" "14f56c124b5d3b17f4a8c3886ca7866ed122d9ff5d1434a57de7e96924595d2c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]    Compiling cargo-husky v1.4.0
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking float-cmp v0.5.3
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking predicates v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling structopt-derive v0.3.5
[INFO] [stderr]    Compiling calmio_filters v0.1.0
[INFO] [stderr]     Checking calm_io v0.1.1
[INFO] [stderr]     Checking structopt v0.3.5
[INFO] [stderr]     Checking licensor v2.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]  --> src/types.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct License {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 7 |     pub id: &'static str,
[INFO] [stdout]   |         ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/types.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Exception {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 14 |     pub id: &'static str,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]  --> src/types.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct License {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 7 |     pub id: &'static str,
[INFO] [stdout]   |         ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/types.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Exception {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 14 |     pub id: &'static str,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.83s
[INFO] running `Command { std: "docker" "inspect" "14f56c124b5d3b17f4a8c3886ca7866ed122d9ff5d1434a57de7e96924595d2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14f56c124b5d3b17f4a8c3886ca7866ed122d9ff5d1434a57de7e96924595d2c", kill_on_drop: false }`
[INFO] [stdout] 14f56c124b5d3b17f4a8c3886ca7866ed122d9ff5d1434a57de7e96924595d2c
[INFO] checking licensor-2.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate licensor 2.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate licensor 2.1.0 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 licensor 2.1.0
[INFO] finished tweaking crates.io crate licensor 2.1.0
[INFO] tweaked toml for crates.io crate licensor 2.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate licensor 2.1.0 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] 3f33c62367a5f313224004435f5eca88fd47a4dab5c3ff1978e23f43f6f6e481
[INFO] running `Command { std: "docker" "start" "-a" "3f33c62367a5f313224004435f5eca88fd47a4dab5c3ff1978e23f43f6f6e481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f33c62367a5f313224004435f5eca88fd47a4dab5c3ff1978e23f43f6f6e481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f33c62367a5f313224004435f5eca88fd47a4dab5c3ff1978e23f43f6f6e481", kill_on_drop: false }`
[INFO] [stdout] 3f33c62367a5f313224004435f5eca88fd47a4dab5c3ff1978e23f43f6f6e481
[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] 0ce9b0ee9e90e032878dd0c2998c0f0bad651cbfd75f1c1774a97bdd167714ff
[INFO] running `Command { std: "docker" "start" "-a" "0ce9b0ee9e90e032878dd0c2998c0f0bad651cbfd75f1c1774a97bdd167714ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling cargo-husky v1.4.0
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking float-cmp v0.5.3
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking predicates v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling calmio_filters v0.1.0
[INFO] [stderr]    Compiling structopt-derive v0.3.5
[INFO] [stderr]     Checking calm_io v0.1.1
[INFO] [stderr]     Checking structopt v0.3.5
[INFO] [stderr]     Checking licensor v2.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]  --> src/types.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct License {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 7 |     pub id: &'static str,
[INFO] [stdout]   |         ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/types.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Exception {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 14 |     pub id: &'static str,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]  --> src/types.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct License {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 7 |     pub id: &'static str,
[INFO] [stdout]   |         ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/types.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Exception {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 14 |     pub id: &'static str,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.28s
[INFO] running `Command { std: "docker" "inspect" "0ce9b0ee9e90e032878dd0c2998c0f0bad651cbfd75f1c1774a97bdd167714ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ce9b0ee9e90e032878dd0c2998c0f0bad651cbfd75f1c1774a97bdd167714ff", kill_on_drop: false }`
[INFO] [stdout] 0ce9b0ee9e90e032878dd0c2998c0f0bad651cbfd75f1c1774a97bdd167714ff