[INFO] fetching crate nasbench 0.1.2...
[INFO] checking nasbench-0.1.2 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate nasbench 0.1.2 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate nasbench 0.1.2 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nasbench 0.1.2
[INFO] finished tweaking crates.io crate nasbench 0.1.2
[INFO] tweaked toml for crates.io crate nasbench 0.1.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate crates.io crate nasbench 0.1.2 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4dbd887a2cf62aa06e1be1c670aa1678bb4b53eb6b15c9641dbc85e840e7b48d
[INFO] running `Command { std: "docker" "start" "-a" "4dbd887a2cf62aa06e1be1c670aa1678bb4b53eb6b15c9641dbc85e840e7b48d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dbd887a2cf62aa06e1be1c670aa1678bb4b53eb6b15c9641dbc85e840e7b48d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dbd887a2cf62aa06e1be1c670aa1678bb4b53eb6b15c9641dbc85e840e7b48d", kill_on_drop: false }`
[INFO] [stdout] 4dbd887a2cf62aa06e1be1c670aa1678bb4b53eb6b15c9641dbc85e840e7b48d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d63a458105734c8c49e7ecbb34ba73e261e7cfdeb7830043cc44c658360a7747
[INFO] running `Command { std: "docker" "start" "-a" "d63a458105734c8c49e7ecbb34ba73e261e7cfdeb7830043cc44c658360a7747", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking serde_json v1.0.45
[INFO] [stderr]    Compiling syn-mid v0.4.0
[INFO] [stderr]    Compiling trackable_derive v0.1.2
[INFO] [stderr]     Checking trackable v0.2.23
[INFO] [stderr]     Checking bytecodec v0.4.13
[INFO] [stderr]    Compiling proc-macro-error v0.4.5
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.5
[INFO] [stderr]    Compiling structopt-derive v0.4.1
[INFO] [stderr]     Checking protobuf_codec v0.2.8
[INFO] [stderr]     Checking structopt v0.3.8
[INFO] [stderr]     Checking nasbench v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/dataset.rs:91:17
[INFO] [stdout]    |
[INFO] [stdout] 91 |             let mut model = models.entry(record.spec.clone()).or_default();
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/dataset.rs:91:17
[INFO] [stdout]    |
[INFO] [stdout] 91 |             let mut model = models.entry(record.spec.clone()).or_default();
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `len` is never read
[INFO] [stdout]   --> src/tfrecord.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct TfRecord {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 10 |     pub len: u64,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TfRecord` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `len` is never read
[INFO] [stdout]   --> src/tfrecord.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct TfRecord {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 10 |     pub len: u64,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TfRecord` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.25s
[INFO] running `Command { std: "docker" "inspect" "d63a458105734c8c49e7ecbb34ba73e261e7cfdeb7830043cc44c658360a7747", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d63a458105734c8c49e7ecbb34ba73e261e7cfdeb7830043cc44c658360a7747", kill_on_drop: false }`
[INFO] [stdout] d63a458105734c8c49e7ecbb34ba73e261e7cfdeb7830043cc44c658360a7747