[INFO] fetching crate serde_ub_json 0.1.0...
[INFO] checking serde_ub_json-0.1.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate serde_ub_json 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate serde_ub_json 0.1.0
[INFO] finished tweaking crates.io crate serde_ub_json 0.1.0
[INFO] tweaked toml for crates.io crate serde_ub_json 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_ub_json 0.1.0 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 71 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.6.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 363f8fec4a6213f6952faab5b1ba6343338b8ffb89b1345350243bca5a7188b3
[INFO] running `Command { std: "docker" "start" "-a" "363f8fec4a6213f6952faab5b1ba6343338b8ffb89b1345350243bca5a7188b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "363f8fec4a6213f6952faab5b1ba6343338b8ffb89b1345350243bca5a7188b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "363f8fec4a6213f6952faab5b1ba6343338b8ffb89b1345350243bca5a7188b3", kill_on_drop: false }`
[INFO] [stdout] 363f8fec4a6213f6952faab5b1ba6343338b8ffb89b1345350243bca5a7188b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1be1f1d8cf277223fc61becbc685db4fb7844d41fe421d56cc077b9afc7c7db9
[INFO] running `Command { std: "docker" "start" "-a" "1be1f1d8cf277223fc61becbc685db4fb7844d41fe421d56cc077b9afc7c7db9", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-width v0.1.14
[INFO] [stderr]     Checking csv-core v0.1.12
[INFO] [stderr]     Checking half v1.8.3
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking serde_ub_json v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking csv v1.3.1
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: unused import: `serde::Serialize`
[INFO] [stdout]  --> benches/benchmarks/ser_vec_of_integers.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::Serialize;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Deserialize`
[INFO] [stdout]  --> benches/benchmarks/de_vec_of_integers.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::Deserialize;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `field1` and `field2` are never read
[INFO] [stdout]  --> benches/benchmarks/de_simple_struct.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct SimpleStruct {
[INFO] [stdout]   |        ------------ fields in this struct
[INFO] [stdout] 6 |     field1: i32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 7 |     field2: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `SimpleStruct` has derived impls for the traits `Debug` and `Clone`, 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: unnecessary transmute
[INFO] [stdout]    --> src/ser.rs:713:33
[INFO] [stdout]     |
[INFO] [stdout] 713 |             vec![b'i', unsafe { transmute::<i8, u8>(value.to_be()) }]
[INFO] [stdout]     |                                 -------------------^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                 |
[INFO] [stdout]     |                                 help: replace this with: `i8::cast_unsigned`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unnecessary_transmutes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.71s
[INFO] running `Command { std: "docker" "inspect" "1be1f1d8cf277223fc61becbc685db4fb7844d41fe421d56cc077b9afc7c7db9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1be1f1d8cf277223fc61becbc685db4fb7844d41fe421d56cc077b9afc7c7db9", kill_on_drop: false }`
[INFO] [stdout] 1be1f1d8cf277223fc61becbc685db4fb7844d41fe421d56cc077b9afc7c7db9