[INFO] cloning repository https://github.com/inakleinbottle/teach
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/inakleinbottle/teach" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finakleinbottle%2Fteach"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finakleinbottle%2Fteach'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 62734209c52381291183e8548b4ef05260f71cce
[INFO] checking inakleinbottle/teach against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finakleinbottle%2Fteach" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/inakleinbottle/teach on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/inakleinbottle/teach
[INFO] finished tweaking git repo https://github.com/inakleinbottle/teach
[INFO] tweaked toml for git repo https://github.com/inakleinbottle/teach written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/inakleinbottle/teach already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a38143eda6dbc5c2554b78c23ee95672097c5b571a310a5e41bcc5b4438f662e
[INFO] running `"docker" "start" "-a" "a38143eda6dbc5c2554b78c23ee95672097c5b571a310a5e41bcc5b4438f662e"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling winapi v0.3.8
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking ascii v0.9.3
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking directories v0.10.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]     Checking getrandom v0.1.12
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking backtrace v0.3.35
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking cgmath v0.16.1
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking latex v0.3.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]     Checking winconsole v0.10.0
[INFO] [stderr]     Checking colored v1.8.0
[INFO] [stderr]     Checking simple_logger v1.3.0
[INFO] [stderr]     Checking serde v1.0.99
[INFO] [stderr]     Checking toml_edit v0.1.5
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking outparse v0.1.0 (https://github.com/inakleinbottle/texoutparse-rs.git#a1b51032)
[INFO] [stderr]     Checking toml v0.5.3
[INFO] [stderr]     Checking confy v0.3.1
[INFO] [stderr]     Checking teach v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `PathBuf`
[INFO] [stderr]  --> src/preview.rs:4:23
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::path::{Path, PathBuf};
[INFO] [stderr]   |                       ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `error`
[INFO] [stderr]   --> src/preview.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 | use log::{warn, error, info, trace};
[INFO] [stderr]    |                 ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PathBuf`
[INFO] [stderr]  --> src/preview.rs:4:23
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::path::{Path, PathBuf};
[INFO] [stderr]   |                       ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `error`
[INFO] [stderr]   --> src/preview.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 | use log::{warn, error, info, trace};
[INFO] [stderr]    |                 ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude`
[INFO] [stderr]  --> src/makefile.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude`
[INFO] [stderr]  --> src/makefile.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::io::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/makefile.rs:191:9
[INFO] [stderr]     |
[INFO] [stderr] 191 |     let mut comp: Vec<&str> = components.iter().map(AsRef::as_ref).collect();
[INFO] [stderr]     |         ----^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/makefile.rs:191:9
[INFO] [stderr]     |
[INFO] [stderr] 191 |     let mut comp: Vec<&str> = components.iter().map(AsRef::as_ref).collect();
[INFO] [stderr]     |         ----^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `TEXINPUTS` should have a snake case name
[INFO] [stderr]    --> src/makefile.rs:144:13
[INFO] [stderr]     |
[INFO] [stderr] 144 |     let mut TEXINPUTS = String::from("export TEXINPUTS=");
[INFO] [stderr]     |             ^^^^^^^^^ help: convert the identifier to snake case: `texinputs`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `TEXINPUTS` should have a snake case name
[INFO] [stderr]    --> src/makefile.rs:144:13
[INFO] [stderr]     |
[INFO] [stderr] 144 |     let mut TEXINPUTS = String::from("export TEXINPUTS=");
[INFO] [stderr]     |             ^^^^^^^^^ help: convert the identifier to snake case: `texinputs`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Path`
[INFO] [stderr]  --> src/main.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::path::{Path, PathBuf};
[INFO] [stderr]   |                 ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Path`
[INFO] [stderr]  --> src/main.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::path::{Path, PathBuf};
[INFO] [stderr]   |                 ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 21s
[INFO] running `"docker" "inspect" "a38143eda6dbc5c2554b78c23ee95672097c5b571a310a5e41bcc5b4438f662e"`
[INFO] running `"docker" "rm" "-f" "a38143eda6dbc5c2554b78c23ee95672097c5b571a310a5e41bcc5b4438f662e"`
[INFO] [stdout] a38143eda6dbc5c2554b78c23ee95672097c5b571a310a5e41bcc5b4438f662e