[INFO] fetching crate pwfr 0.0.0-none...
[INFO] checking pwfr-0.0.0-none against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate pwfr 0.0.0-none into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate pwfr 0.0.0-none 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 pwfr 0.0.0-none
[INFO] finished tweaking crates.io crate pwfr 0.0.0-none
[INFO] tweaked toml for crates.io crate pwfr 0.0.0-none written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate pwfr 0.0.0-none 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 pest_generator v2.1.1
[INFO] [stderr]   Downloaded pest_meta v2.1.2
[INFO] [stderr]   Downloaded pest_derive v2.1.0
[INFO] [stderr]   Downloaded termion v1.5.3
[INFO] [stderr]   Downloaded nodrop v0.1.13
[INFO] [stderr]   Downloaded constant_time_eq v0.1.4
[INFO] [stderr]   Downloaded redox_users v0.3.1
[INFO] [stderr]   Downloaded arrayref v0.3.5
[INFO] [stderr]   Downloaded blake2b_simd v0.5.8
[INFO] [stderr]   Downloaded arrayvec v0.4.11
[INFO] [stderr]   Downloaded rust-argon2 v0.5.1
[INFO] [stderr]   Downloaded nix v0.15.0
[INFO] [stderr]   Downloaded libc v0.2.62
[INFO] [stderr]   Downloaded backtrace-sys v0.1.31
[INFO] [stderr]   Downloaded syn v1.0.5
[INFO] [stderr]   Downloaded backtrace v0.3.38
[INFO] [stderr]   Downloaded synstructure v0.10.2
[INFO] [stderr]   Downloaded bitflags v1.2.0
[INFO] [stderr]   Downloaded cc v1.0.45
[INFO] [stderr]   Downloaded ucd-trie v0.1.2
[INFO] [stderr]   Downloaded pest v2.1.2
[INFO] [stderr]   Downloaded dirs-sys v0.3.4
[INFO] [stderr]   Downloaded sha-1 v0.8.1
[INFO] [stderr]   Downloaded failure_derive v0.1.5
[INFO] [stderr]   Downloaded block-padding v0.1.4
[INFO] [stderr]   Downloaded proc-macro2 v1.0.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] fd75197c43803bd5962b6ae6ea514eeb43c572bb5e0f956295bbac10bbaa2819
[INFO] running `Command { std: "docker" "start" "-a" "fd75197c43803bd5962b6ae6ea514eeb43c572bb5e0f956295bbac10bbaa2819", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd75197c43803bd5962b6ae6ea514eeb43c572bb5e0f956295bbac10bbaa2819", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd75197c43803bd5962b6ae6ea514eeb43c572bb5e0f956295bbac10bbaa2819", kill_on_drop: false }`
[INFO] [stdout] fd75197c43803bd5962b6ae6ea514eeb43c572bb5e0f956295bbac10bbaa2819
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 001f46bea32f6aae1cf2282a80553f34c0c1bb6f2e7c23088548523498ca9627
[INFO] running `Command { std: "docker" "start" "-a" "001f46bea32f6aae1cf2282a80553f34c0c1bb6f2e7c23088548523498ca9627", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling proc-macro2 v1.0.4
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling bitflags v1.2.0
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling ucd-trie v0.1.2
[INFO] [stderr]    Compiling pest v2.1.2
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling pest_meta v2.1.2
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking termion v1.5.3
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking backtrace v0.3.38
[INFO] [stderr]    Compiling pest_generator v2.1.1
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking pwfr v0.0.0-none (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `nix` is imported redundantly
[INFO] [stdout]   --> src/pwfr/core/ebuild/executor.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use nix;
[INFO] [stdout]    |     ^^^ the item `nix` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Parser` is imported redundantly
[INFO] [stdout]     --> src/pwfr/core/ebuild/efile.rs:1461:9
[INFO] [stdout]      |
[INFO] [stdout] 1461 |     use pest::Parser;
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 1462 |
[INFO] [stdout] 1463 |     use super::*;
[INFO] [stdout]      |         -------- the item `Parser` is already imported here
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `nix` is imported redundantly
[INFO] [stdout]   --> src/pwfr/core/ebuild/executor.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use nix;
[INFO] [stdout]    |     ^^^ the item `nix` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `pgid` and `background` are never read
[INFO] [stdout]   --> src/pwfr/core/ebuild/executor.rs:84:5
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct Context {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 84 |     pgid: Option<Pid>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 85 |     /// The process should be executed in background.
[INFO] [stdout] 86 |     background: bool,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Context` 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: fields `pgid` and `background` are never read
[INFO] [stdout]   --> src/pwfr/core/ebuild/executor.rs:84:5
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct Context {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 84 |     pgid: Option<Pid>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 85 |     /// The process should be executed in background.
[INFO] [stdout] 86 |     background: bool,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Context` 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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.45s
[INFO] running `Command { std: "docker" "inspect" "001f46bea32f6aae1cf2282a80553f34c0c1bb6f2e7c23088548523498ca9627", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "001f46bea32f6aae1cf2282a80553f34c0c1bb6f2e7c23088548523498ca9627", kill_on_drop: false }`
[INFO] [stdout] 001f46bea32f6aae1cf2282a80553f34c0c1bb6f2e7c23088548523498ca9627