[INFO] fetching crate dfrs 0.0.7...
[INFO] checking dfrs-0.0.7 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate dfrs 0.0.7 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate dfrs 0.0.7 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 dfrs 0.0.7
[INFO] finished tweaking crates.io crate dfrs 0.0.7
[INFO] tweaked toml for crates.io crate dfrs 0.0.7 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate dfrs 0.0.7 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] a7e21d9dc79e4549cc606d9d280729abed4b5d027d833880582f7e3e70761d6f
[INFO] running `Command { std: "docker" "start" "-a" "a7e21d9dc79e4549cc606d9d280729abed4b5d027d833880582f7e3e70761d6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7e21d9dc79e4549cc606d9d280729abed4b5d027d833880582f7e3e70761d6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7e21d9dc79e4549cc606d9d280729abed4b5d027d833880582f7e3e70761d6f", kill_on_drop: false }`
[INFO] [stdout] a7e21d9dc79e4549cc606d9d280729abed4b5d027d833880582f7e3e70761d6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 24b5ebda551fcbefaaafe0498e61dd8f1da135e13b03812e6e99a3ec64a9096f
[INFO] running `Command { std: "docker" "start" "-a" "24b5ebda551fcbefaaafe0498e61dd8f1da135e13b03812e6e99a3ec64a9096f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling libc v0.2.83
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking thread_local v1.1.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking strum v0.20.0
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.19.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking env_logger v0.8.2
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking dfrs v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `error`, `info`, and `warn`
[INFO] [stdout]  --> src/errors.rs:2:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub use log::{debug, error, info, warn};
[INFO] [stdout]   |                      ^^^^^  ^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `error`, `info`, and `warn`
[INFO] [stdout]  --> src/errors.rs:2:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub use log::{debug, error, info, warn};
[INFO] [stdout]   |                      ^^^^^  ^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `base2` is never read
[INFO] [stdout]   --> src/args.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Args {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub base2: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Args` 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: fields `mnt_opts`, `mnt_freq`, and `mnt_passno` are never read
[INFO] [stdout]   --> src/mount.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Mount {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub mnt_opts: String,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 18 |     pub mnt_freq: i32,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 19 |     pub mnt_passno: i32,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Mount` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `base2` is never read
[INFO] [stdout]   --> src/args.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Args {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub base2: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Args` 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 17.55s
[INFO] running `Command { std: "docker" "inspect" "24b5ebda551fcbefaaafe0498e61dd8f1da135e13b03812e6e99a3ec64a9096f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24b5ebda551fcbefaaafe0498e61dd8f1da135e13b03812e6e99a3ec64a9096f", kill_on_drop: false }`
[INFO] [stdout] 24b5ebda551fcbefaaafe0498e61dd8f1da135e13b03812e6e99a3ec64a9096f