[INFO] fetching crate runnel 0.3.17...
[INFO] checking runnel-0.3.17 against master#35936c4839dd272646394779d151e060d0f6b3ac for pr-122960-1
[INFO] extracting crate runnel 0.3.17 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate runnel 0.3.17 on toolchain 35936c4839dd272646394779d151e060d0f6b3ac
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35936c4839dd272646394779d151e060d0f6b3ac" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc1/source/.cargo/config
[INFO] started tweaking crates.io crate runnel 0.3.17
[INFO] finished tweaking crates.io crate runnel 0.3.17
[INFO] tweaked toml for crates.io crate runnel 0.3.17 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35936c4839dd272646394779d151e060d0f6b3ac" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35936c4839dd272646394779d151e060d0f6b3ac" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+35936c4839dd272646394779d151e060d0f6b3ac" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fecf7ffc57f5251f6257c9f2fb41df298accc74e2125992e690e3fca39ef72da
[INFO] running `Command { std: "docker" "start" "-a" "fecf7ffc57f5251f6257c9f2fb41df298accc74e2125992e690e3fca39ef72da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fecf7ffc57f5251f6257c9f2fb41df298accc74e2125992e690e3fca39ef72da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fecf7ffc57f5251f6257c9f2fb41df298accc74e2125992e690e3fca39ef72da", kill_on_drop: false }`
[INFO] [stdout] fecf7ffc57f5251f6257c9f2fb41df298accc74e2125992e690e3fca39ef72da
[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" "+35936c4839dd272646394779d151e060d0f6b3ac" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b1de795a9bfe8804de5aabcc26fba03c4d3f82ecfd5bc48f05f3924655e5fdf
[INFO] running `Command { std: "docker" "start" "-a" "2b1de795a9bfe8804de5aabcc26fba03c4d3f82ecfd5bc48f05f3924655e5fdf", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling runnel v0.3.17 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]  --> src/medium/lineio.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::*;
[INFO] [stdout]   |     -------- the item `BufRead` is already imported here
[INFO] [stdout] 7 |
[INFO] [stdout] 8 | use std::io::{BufRead, BufReader, BufWriter, Read, Write};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]  --> src/medium/lineio.rs:8:46
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::*;
[INFO] [stdout]   |     -------- the item `Read` is already imported here
[INFO] [stdout] 7 |
[INFO] [stdout] 8 | use std::io::{BufRead, BufReader, BufWriter, Read, Write};
[INFO] [stdout]   |                                              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]  --> src/medium/lineio.rs:8:52
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::*;
[INFO] [stdout]   |     -------- the item `Write` is already imported here
[INFO] [stdout] 7 |
[INFO] [stdout] 8 | use std::io::{BufRead, BufReader, BufWriter, Read, Write};
[INFO] [stdout]   |                                                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]  --> src/medium/pipeio.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `BufRead` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]  --> src/medium/pipeio.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `Read` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]  --> src/medium/pipeio.rs:6:41
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `Write` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]  --> src/medium/stdio.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `BufRead` is already imported here
[INFO] [stdout] 6 |
[INFO] [stdout] 7 | use std::io::{BufRead, Read, Write};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]  --> src/medium/stdio.rs:7:24
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `Read` is already imported here
[INFO] [stdout] 6 |
[INFO] [stdout] 7 | use std::io::{BufRead, Read, Write};
[INFO] [stdout]   |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]  --> src/medium/stdio.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `Write` is already imported here
[INFO] [stdout] 6 |
[INFO] [stdout] 7 | use std::io::{BufRead, Read, Write};
[INFO] [stdout]   |                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]  --> src/medium/stringio.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `BufRead` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]  --> src/medium/stringio.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `Read` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]  --> src/medium/stringio.rs:6:41
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `Write` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]  --> src/medium/lineio.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::*;
[INFO] [stdout]   |     -------- the item `BufRead` is already imported here
[INFO] [stdout] 7 |
[INFO] [stdout] 8 | use std::io::{BufRead, BufReader, BufWriter, Read, Write};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]  --> src/medium/lineio.rs:8:46
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::*;
[INFO] [stdout]   |     -------- the item `Read` is already imported here
[INFO] [stdout] 7 |
[INFO] [stdout] 8 | use std::io::{BufRead, BufReader, BufWriter, Read, Write};
[INFO] [stdout]   |                                              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]  --> src/medium/lineio.rs:8:52
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::*;
[INFO] [stdout]   |     -------- the item `Write` is already imported here
[INFO] [stdout] 7 |
[INFO] [stdout] 8 | use std::io::{BufRead, BufReader, BufWriter, Read, Write};
[INFO] [stdout]   |                                                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]  --> src/medium/pipeio.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `BufRead` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]  --> src/medium/pipeio.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `Read` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]  --> src/medium/pipeio.rs:6:41
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `Write` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]  --> src/medium/stdio.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `BufRead` is already imported here
[INFO] [stdout] 6 |
[INFO] [stdout] 7 | use std::io::{BufRead, Read, Write};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]  --> src/medium/stdio.rs:7:24
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `Read` is already imported here
[INFO] [stdout] 6 |
[INFO] [stdout] 7 | use std::io::{BufRead, Read, Write};
[INFO] [stdout]   |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]  --> src/medium/stdio.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `Write` is already imported here
[INFO] [stdout] 6 |
[INFO] [stdout] 7 | use std::io::{BufRead, Read, Write};
[INFO] [stdout]   |                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]  --> src/medium/stringio.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `BufRead` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]  --> src/medium/stringio.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `Read` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]  --> src/medium/stringio.rs:6:41
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `Write` is already imported here
[INFO] [stdout] 5 |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.30s
[INFO] running `Command { std: "docker" "inspect" "2b1de795a9bfe8804de5aabcc26fba03c4d3f82ecfd5bc48f05f3924655e5fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b1de795a9bfe8804de5aabcc26fba03c4d3f82ecfd5bc48f05f3924655e5fdf", kill_on_drop: false }`
[INFO] [stdout] 2b1de795a9bfe8804de5aabcc26fba03c4d3f82ecfd5bc48f05f3924655e5fdf