[INFO] cloning repository https://github.com/inakleinbottle/teach
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finakleinbottle%2Fteach'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 40cdc5ecbe256531dd1754c3848dff0b48ece897
[INFO] checking inakleinbottle/teach against master#a836d9b6413d9d593be6c09463ff8c4c70e56599 for pr-84037
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finakleinbottle%2Fteach" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/inakleinbottle/teach on toolchain a836d9b6413d9d593be6c09463ff8c4c70e56599
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-0/source/Cargo.toml
[INFO] crate git repo https://github.com/inakleinbottle/teach already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/inakleinbottle/texoutparse-rs.git`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 38f4283e136f833b3e65b13f3e980d4f9f4a03e7117d18796ad507ddceb6bb75
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "38f4283e136f833b3e65b13f3e980d4f9f4a03e7117d18796ad507ddceb6bb75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38f4283e136f833b3e65b13f3e980d4f9f4a03e7117d18796ad507ddceb6bb75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38f4283e136f833b3e65b13f3e980d4f9f4a03e7117d18796ad507ddceb6bb75", kill_on_drop: false }`
[INFO] [stdout] 38f4283e136f833b3e65b13f3e980d4f9f4a03e7117d18796ad507ddceb6bb75
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 175ad8d167b6c0bd7789f6fefb712993189583a803b18554cb37f61f522a6b77
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "175ad8d167b6c0bd7789f6fefb712993189583a803b18554cb37f61f522a6b77", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking object v0.23.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking regex-syntax v0.6.24
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking directories v0.10.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling backtrace v0.3.58
[INFO] [stderr]     Checking term_grid v0.1.7
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking regex v1.5.2
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking addr2line v0.14.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking simple_logger v1.11.0
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking latex v0.3.1
[INFO] [stderr]     Checking toml_edit v0.1.5
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking serde v1.0.125
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking outparse v0.1.0 (https://github.com/inakleinbottle/texoutparse-rs.git#a1b51032)
[INFO] [stderr]     Checking confy v0.3.1
[INFO] [stderr]     Checking teach v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/preview.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error`
[INFO] [stdout]  --> src/preview.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | use log::{error, info, trace, warn};
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/preview.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error`
[INFO] [stdout]  --> src/preview.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | use log::{error, info, trace, warn};
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude`
[INFO] [stdout]  --> src/makefile.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude`
[INFO] [stdout]  --> src/makefile.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/makefile.rs:187:9
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let mut comp: Vec<&str> = components.iter().map(AsRef::as_ref).collect();
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/makefile.rs:187:9
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let mut comp: Vec<&str> = components.iter().map(AsRef::as_ref).collect();
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `TEXINPUTS` should have a snake case name
[INFO] [stdout]    --> src/makefile.rs:144:13
[INFO] [stdout]     |
[INFO] [stdout] 144 |     let mut TEXINPUTS = String::from("export TEXINPUTS=");
[INFO] [stdout]     |             ^^^^^^^^^ help: convert the identifier to snake case: `texinputs`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `TEXINPUTS` should have a snake case name
[INFO] [stdout]    --> src/makefile.rs:144:13
[INFO] [stdout]     |
[INFO] [stdout] 144 |     let mut TEXINPUTS = String::from("export TEXINPUTS=");
[INFO] [stdout]     |             ^^^^^^^^^ help: convert the identifier to snake case: `texinputs`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `simple_logger::init_with_level`: Please use the Builder pattern instead.
[INFO] [stdout]   --> src/main.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     simple_logger::init_with_level(level).unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `simple_logger::init_with_level`: Please use the Builder pattern instead.
[INFO] [stdout]   --> src/main.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     simple_logger::init_with_level(level).unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.23s
[INFO] running `Command { std: "docker" "inspect" "175ad8d167b6c0bd7789f6fefb712993189583a803b18554cb37f61f522a6b77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "175ad8d167b6c0bd7789f6fefb712993189583a803b18554cb37f61f522a6b77", kill_on_drop: false }`
[INFO] [stdout] 175ad8d167b6c0bd7789f6fefb712993189583a803b18554cb37f61f522a6b77