[INFO] fetching crate jsonbb 0.1.3...
[INFO] checking jsonbb-0.1.3 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate jsonbb 0.1.3 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate jsonbb 0.1.3 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jsonbb 0.1.3
[INFO] finished tweaking crates.io crate jsonbb 0.1.3
[INFO] tweaked toml for crates.io crate jsonbb 0.1.3 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 107 packages
[INFO] [stderr]       Adding anes v0.1.6 (latest: v0.2.0)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded jsonb v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23fbdd2af6b2b135892abab93a29fcc74c2bff19616f0c751c905de4fa4bca10
[INFO] running `Command { std: "docker" "start" "-a" "23fbdd2af6b2b135892abab93a29fcc74c2bff19616f0c751c905de4fa4bca10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23fbdd2af6b2b135892abab93a29fcc74c2bff19616f0c751c905de4fa4bca10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23fbdd2af6b2b135892abab93a29fcc74c2bff19616f0c751c905de4fa4bca10", kill_on_drop: false }`
[INFO] [stdout] 23fbdd2af6b2b135892abab93a29fcc74c2bff19616f0c751c905de4fa4bca10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5378538efbc70ced0f75a7ac641aa6919a893b0d7a11194f38ff19104e9b7eb2
[INFO] running `Command { std: "docker" "start" "-a" "5378538efbc70ced0f75a7ac641aa6919a893b0d7a11194f38ff19104e9b7eb2", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking lexical-util v0.8.5
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]    Compiling ref-cast-impl v1.0.22
[INFO] [stderr]     Checking ordered-float v4.2.0
[INFO] [stderr]     Checking fast-float v0.2.0
[INFO] [stderr]     Checking simdutf8 v0.1.4
[INFO] [stderr]     Checking halfbrown v0.2.5
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking value-trait v0.8.1
[INFO] [stderr]     Checking ref-cast v1.0.22
[INFO] [stderr]     Checking lexical-write-integer v0.8.5
[INFO] [stderr]     Checking lexical-parse-integer v0.8.6
[INFO] [stderr]     Checking lexical-parse-float v0.8.5
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking jsonb v0.3.0
[INFO] [stderr]     Checking jsonbb v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking lexical-write-float v0.8.5
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/partial_eq.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking lexical-core v0.8.5
[INFO] [stderr]     Checking simd-json v0.13.9
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/partial_eq.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[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 2.21s
[INFO] running `Command { std: "docker" "inspect" "5378538efbc70ced0f75a7ac641aa6919a893b0d7a11194f38ff19104e9b7eb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5378538efbc70ced0f75a7ac641aa6919a893b0d7a11194f38ff19104e9b7eb2", kill_on_drop: false }`
[INFO] [stdout] 5378538efbc70ced0f75a7ac641aa6919a893b0d7a11194f38ff19104e9b7eb2