[INFO] fetching crate yarnspinner 0.1.0...
[INFO] checking yarnspinner-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate yarnspinner 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate yarnspinner 0.1.0 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 yarnspinner 0.1.0
[INFO] finished tweaking crates.io crate yarnspinner 0.1.0
[INFO] tweaked toml for crates.io crate yarnspinner 0.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate yarnspinner 0.1.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded logos-derive v0.11.5
[INFO] [stderr]   Downloaded logos v0.11.4
[INFO] [stderr]   Downloaded thiserror-impl v1.0.16
[INFO] [stderr]   Downloaded beef v0.4.3
[INFO] [stderr]   Downloaded thiserror v1.0.16
[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] d9c1cd88ab4c85094c84c51e518f4acac6a0f8e04e3d957a927fda3be35f3d92
[INFO] running `Command { std: "docker" "start" "-a" "d9c1cd88ab4c85094c84c51e518f4acac6a0f8e04e3d957a927fda3be35f3d92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9c1cd88ab4c85094c84c51e518f4acac6a0f8e04e3d957a927fda3be35f3d92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9c1cd88ab4c85094c84c51e518f4acac6a0f8e04e3d957a927fda3be35f3d92", kill_on_drop: false }`
[INFO] [stdout] d9c1cd88ab4c85094c84c51e518f4acac6a0f8e04e3d957a927fda3be35f3d92
[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] 1c7ee2fad60e1613b873161bbe6368bb0a2fe44ff425568fc2ebc19ddbaa087a
[INFO] running `Command { std: "docker" "start" "-a" "1c7ee2fad60e1613b873161bbe6368bb0a2fe44ff425568fc2ebc19ddbaa087a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling beef v0.4.3
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling logos-derive v0.11.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.16
[INFO] [stderr]     Checking thiserror v1.0.16
[INFO] [stderr]     Checking logos v0.11.4
[INFO] [stderr]     Checking yarnspinner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `tags` and `custom` are never read
[INFO] [stdout]   --> src/ast/mod.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct NodeHeader {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 23 |     pub title: NodeLabel,
[INFO] [stdout] 24 |     pub tags: Vec<String>,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 25 |     pub custom: HashMap<NodeLabel, String>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NodeHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `tags` and `custom` are never read
[INFO] [stdout]   --> src/ast/mod.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct NodeHeader {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 23 |     pub title: NodeLabel,
[INFO] [stdout] 24 |     pub tags: Vec<String>,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 25 |     pub custom: HashMap<NodeLabel, String>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NodeHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 13.07s
[INFO] running `Command { std: "docker" "inspect" "1c7ee2fad60e1613b873161bbe6368bb0a2fe44ff425568fc2ebc19ddbaa087a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c7ee2fad60e1613b873161bbe6368bb0a2fe44ff425568fc2ebc19ddbaa087a", kill_on_drop: false }`
[INFO] [stdout] 1c7ee2fad60e1613b873161bbe6368bb0a2fe44ff425568fc2ebc19ddbaa087a
[INFO] checking yarnspinner-0.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate yarnspinner 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate yarnspinner 0.1.0 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 yarnspinner 0.1.0
[INFO] finished tweaking crates.io crate yarnspinner 0.1.0
[INFO] tweaked toml for crates.io crate yarnspinner 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate crates.io crate yarnspinner 0.1.0 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] [stderr]     Blocking waiting for file lock on package cache
[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] 4dc510a6e5e6eb8d493285e22a348d3895527e83057f9a348a48d3388f0ec164
[INFO] running `Command { std: "docker" "start" "-a" "4dc510a6e5e6eb8d493285e22a348d3895527e83057f9a348a48d3388f0ec164", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dc510a6e5e6eb8d493285e22a348d3895527e83057f9a348a48d3388f0ec164", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dc510a6e5e6eb8d493285e22a348d3895527e83057f9a348a48d3388f0ec164", kill_on_drop: false }`
[INFO] [stdout] 4dc510a6e5e6eb8d493285e22a348d3895527e83057f9a348a48d3388f0ec164
[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] 6c17a3aafe713fed0731c7c0f37c55e896a1a4118455ea42deff4194d08d88ad
[INFO] running `Command { std: "docker" "start" "-a" "6c17a3aafe713fed0731c7c0f37c55e896a1a4118455ea42deff4194d08d88ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling beef v0.4.3
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling logos-derive v0.11.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.16
[INFO] [stderr]     Checking thiserror v1.0.16
[INFO] [stderr]     Checking logos v0.11.4
[INFO] [stderr]     Checking yarnspinner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `tags` and `custom` are never read
[INFO] [stdout]   --> src/ast/mod.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct NodeHeader {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 23 |     pub title: NodeLabel,
[INFO] [stdout] 24 |     pub tags: Vec<String>,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 25 |     pub custom: HashMap<NodeLabel, String>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NodeHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `tags` and `custom` are never read
[INFO] [stdout]   --> src/ast/mod.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct NodeHeader {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 23 |     pub title: NodeLabel,
[INFO] [stdout] 24 |     pub tags: Vec<String>,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 25 |     pub custom: HashMap<NodeLabel, String>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NodeHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 15.09s
[INFO] running `Command { std: "docker" "inspect" "6c17a3aafe713fed0731c7c0f37c55e896a1a4118455ea42deff4194d08d88ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c17a3aafe713fed0731c7c0f37c55e896a1a4118455ea42deff4194d08d88ad", kill_on_drop: false }`
[INFO] [stdout] 6c17a3aafe713fed0731c7c0f37c55e896a1a4118455ea42deff4194d08d88ad