[INFO] fetching crate ifcfg 0.1.2...
[INFO] checking ifcfg-0.1.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate ifcfg 0.1.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate ifcfg 0.1.2 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 ifcfg 0.1.2
[INFO] finished tweaking crates.io crate ifcfg 0.1.2
[INFO] tweaked toml for crates.io crate ifcfg 0.1.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate ifcfg 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8-ranges v1.0.4
[INFO] [stderr]   Downloaded ucd-util v0.1.8
[INFO] [stderr]   Downloaded serde v1.0.124
[INFO] [stderr]   Downloaded pest v0.3.3
[INFO] [stderr]   Downloaded handlebars v0.29.1
[INFO] [stderr]   Downloaded serde_derive v1.0.124
[INFO] [stderr]   Downloaded syn v1.0.63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] db5b14d1a55a79a144a5ea440c8b5918e97fa76bbb6b78fd10ff468e873acff0
[INFO] running `Command { std: "docker" "start" "-a" "db5b14d1a55a79a144a5ea440c8b5918e97fa76bbb6b78fd10ff468e873acff0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db5b14d1a55a79a144a5ea440c8b5918e97fa76bbb6b78fd10ff468e873acff0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db5b14d1a55a79a144a5ea440c8b5918e97fa76bbb6b78fd10ff468e873acff0", kill_on_drop: false }`
[INFO] [stdout] db5b14d1a55a79a144a5ea440c8b5918e97fa76bbb6b78fd10ff468e873acff0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 3e35e0540124937eae2a5f292de3a696e20a9db582b410eaed9d8e1b2ee6675c
[INFO] running `Command { std: "docker" "start" "-a" "3e35e0540124937eae2a5f292de3a696e20a9db582b410eaed9d8e1b2ee6675c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.63
[INFO] [stderr]    Compiling serde v1.0.124
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling ucd-util v0.1.8
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling pest v0.3.3
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]    Compiling handlebars v0.29.1
[INFO] [stderr]    Compiling ifcfg v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `cc` is imported redundantly
[INFO] [stdout]  --> build.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use cc;
[INFO] [stdout]   |     ^^ the item `cc` 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 `From` is imported redundantly
[INFO] [stdout]   --> build.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     convert::From,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> build.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |     IoError(io::Error),
[INFO] [stdout]     |     ------- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 119 |     IoError(()),
[INFO] [stdout]     |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> build.rs:120:19
[INFO] [stdout]     |
[INFO] [stdout] 120 |     TemplateError(hbs::TemplateError),
[INFO] [stdout]     |     ------------- ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 120 |     TemplateError(()),
[INFO] [stdout]     |                   ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> build.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 |     RenderError(hbs::RenderError),
[INFO] [stdout]     |     ----------- ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 121 |     RenderError(()),
[INFO] [stdout]     |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^ the item `serde_json` 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 `From` is imported redundantly
[INFO] [stdout]  --> src/unix/error.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::convert::From;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `nix` is imported redundantly
[INFO] [stdout]  --> src/unix/error.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use nix;
[INFO] [stdout]   |     ^^^ the item `nix` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsRef` is imported redundantly
[INFO] [stdout]  --> src/unix/constants.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     convert::AsRef,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `AsRef` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]  --> src/unix/ffi.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | use libc::{self, c_void, c_char, c_int, c_uint, c_ushort};
[INFO] [stdout]   |            ^^^^ the item `libc` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^ the item `serde_json` 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 `From` is imported redundantly
[INFO] [stdout]  --> src/unix/error.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::convert::From;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `nix` is imported redundantly
[INFO] [stdout]  --> src/unix/error.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use nix;
[INFO] [stdout]   |     ^^^ the item `nix` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]   --> src/unix/error.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     use std::error::Error;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     use super::*;
[INFO] [stdout]    |         -------- the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fmt` is imported redundantly
[INFO] [stdout]   --> src/unix/error.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     use std::fmt;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 60 |
[INFO] [stdout] 61 |     use super::*;
[INFO] [stdout]    |         -------- the item `fmt` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsRef` is imported redundantly
[INFO] [stdout]  --> src/unix/constants.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     convert::AsRef,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `AsRef` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `libc` is imported redundantly
[INFO] [stdout]  --> src/unix/ffi.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | use libc::{self, c_void, c_char, c_int, c_uint, c_ushort};
[INFO] [stdout]   |            ^^^^ the item `libc` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ifcfg` is imported redundantly
[INFO] [stdout]  --> examples/interfaces.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ifcfg;
[INFO] [stdout]   |     ^^^^^ the item `ifcfg` is already defined by prelude
[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 [optimized + debuginfo] target(s) in 7.58s
[INFO] running `Command { std: "docker" "inspect" "3e35e0540124937eae2a5f292de3a696e20a9db582b410eaed9d8e1b2ee6675c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e35e0540124937eae2a5f292de3a696e20a9db582b410eaed9d8e1b2ee6675c", kill_on_drop: false }`
[INFO] [stdout] 3e35e0540124937eae2a5f292de3a696e20a9db582b410eaed9d8e1b2ee6675c