[INFO] cloning repository https://github.com/wezm/rust-intro-talk
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wezm/rust-intro-talk" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwezm%2Frust-intro-talk", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwezm%2Frust-intro-talk'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 978872c31d714aa413ee86a7c6b5ccdbc8966caa
[INFO] testing wezm/rust-intro-talk against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwezm%2Frust-intro-talk" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wezm/rust-intro-talk on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wezm/rust-intro-talk
[INFO] finished tweaking git repo https://github.com/wezm/rust-intro-talk
[INFO] tweaked toml for git repo https://github.com/wezm/rust-intro-talk written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/wezm/rust-intro-talk already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded skeptic v0.13.2
[INFO] [stderr]   Downloaded libc v0.2.35
[INFO] [stderr]   Downloaded pulldown-cmark v0.1.0
[INFO] [stderr]   Downloaded bytecount v0.2.0
[INFO] [stderr]   Downloaded semver v0.8.0
[INFO] [stderr]   Downloaded backtrace-sys v0.1.16
[INFO] [stderr]   Downloaded cargo_metadata v0.3.3
[INFO] [stderr]   Downloaded winapi v0.3.3
[INFO] [stderr]   Downloaded backtrace v0.3.5
[INFO] [stderr]   Downloaded winapi-i686-pc-windows-gnu v0.3.2
[INFO] [stderr]   Downloaded winapi-x86_64-pc-windows-gnu v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2d66f9242a9bd03edc36704b5738cb2ffddf2fd104947298e4c780c1b31abaac
[INFO] running `Command { std: "docker" "start" "-a" "2d66f9242a9bd03edc36704b5738cb2ffddf2fd104947298e4c780c1b31abaac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2d66f9242a9bd03edc36704b5738cb2ffddf2fd104947298e4c780c1b31abaac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d66f9242a9bd03edc36704b5738cb2ffddf2fd104947298e4c780c1b31abaac", kill_on_drop: false }`
[INFO] [stdout] 2d66f9242a9bd03edc36704b5738cb2ffddf2fd104947298e4c780c1b31abaac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 924e445ad47b4a55dd2ea0bb4d027ac2e5f7bd84eed059a574a88c52b080ae38
[INFO] running `Command { std: "docker" "start" "-a" "924e445ad47b4a55dd2ea0bb4d027ac2e5f7bd84eed059a574a88c52b080ae38", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.3
[INFO] [stderr]    Compiling libc v0.2.35
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling rustc-demangle v0.1.5
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling serde v1.0.27
[INFO] [stderr]    Compiling pulldown-cmark v0.1.0
[INFO] [stderr]    Compiling itoa v0.3.4
[INFO] [stderr]    Compiling num-traits v0.1.41
[INFO] [stderr]    Compiling dtoa v0.4.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr]    Compiling same-file v0.1.3
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling bytecount v0.2.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling walkdir v1.0.7
[INFO] [stderr]    Compiling rand v0.3.19
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling tempdir v0.3.5
[INFO] [stderr]    Compiling serde_derive_internals v0.19.0
[INFO] [stderr]    Compiling serde_derive v1.0.27
[INFO] [stderr]    Compiling semver v0.8.0
[INFO] [stderr]    Compiling serde_json v1.0.9
[INFO] [stderr]    Compiling backtrace v0.3.5
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling cargo_metadata v0.3.3
[INFO] [stderr]    Compiling skeptic v0.13.2
[INFO] [stderr]    Compiling demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.01s
[INFO] running `Command { std: "docker" "inspect" "924e445ad47b4a55dd2ea0bb4d027ac2e5f7bd84eed059a574a88c52b080ae38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "924e445ad47b4a55dd2ea0bb4d027ac2e5f7bd84eed059a574a88c52b080ae38", kill_on_drop: false }`
[INFO] [stdout] 924e445ad47b4a55dd2ea0bb4d027ac2e5f7bd84eed059a574a88c52b080ae38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f45edc1479e1aedd44975055759feee0d2afab7ef1bbf89243d13d872b7689a
[INFO] running `Command { std: "docker" "start" "-a" "6f45edc1479e1aedd44975055759feee0d2afab7ef1bbf89243d13d872b7689a", kill_on_drop: false }`
[INFO] [stderr]    Compiling demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "6f45edc1479e1aedd44975055759feee0d2afab7ef1bbf89243d13d872b7689a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f45edc1479e1aedd44975055759feee0d2afab7ef1bbf89243d13d872b7689a", kill_on_drop: false }`
[INFO] [stdout] 6f45edc1479e1aedd44975055759feee0d2afab7ef1bbf89243d13d872b7689a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 57d169cbe4d34a5f69142a59d7f6bce2c899e74ec6742103edda64119997e06f
[INFO] running `Command { std: "docker" "start" "-a" "57d169cbe4d34a5f69142a59d7f6bce2c899e74ec6742103edda64119997e06f", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/demo-3e939c4e04f5879f)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test test_file_type_rust ... ok
[INFO] [stdout] test test_file_type_html ... ok
[INFO] [stdout] test test_file_type_unknown ... ok
[INFO] [stderr]      Running tests/slides.rs (/opt/rustwide/target/debug/deps/slides-6b2d29fe52d17d47)
[INFO] [stdout] test test_file_type_toml ... ok
[INFO] [stdout] test test_file_type_missing ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test slides_in_sect_functional_or_imperative_line_304 ... ok
[INFO] [stderr] warning: enum is never used: `SerialProtocol`
[INFO] [stderr]  --> /tmp/rust-skeptic.XsNpziPozhmI/test.rs:2:6
[INFO] [stderr]   |
[INFO] [stderr] 2 | enum SerialProtocol {
[INFO] [stderr]   |      ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Person`
[INFO] [stderr]   --> /tmp/rust-skeptic.XsNpziPozhmI/test.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | struct Person {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `name_and_age`
[INFO] [stderr]   --> /tmp/rust-skeptic.XsNpziPozhmI/test.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn name_and_age(&self) -> String {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stdout] test slides_in_sect_structs_line_340 ... ok
[INFO] [stderr] warning: enum is never used: `Result`
[INFO] [stderr]  --> /tmp/rust-skeptic.3uHmrw2Q8zPS/test.rs:2:6
[INFO] [stderr]   |
[INFO] [stderr] 2 | enum Result<T, E> {
[INFO] [stderr]   |      ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] test slides_in_sect_result_line_377 ... ok
[INFO] [stderr] warning: enum is never used: `SerialProtocol`
[INFO] [stderr]  --> /tmp/rust-skeptic.0OOq8wBiNehu/test.rs:2:6
[INFO] [stderr]   |
[INFO] [stderr] 2 | enum SerialProtocol {
[INFO] [stderr]   |      ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] test slides_in_sect_enums_line_324 ... ok
[INFO] [stderr] warning: enum is never used: `Option`
[INFO] [stderr]  --> /tmp/rust-skeptic.YwN9B8YrOBcP/test.rs:2:6
[INFO] [stderr]   |
[INFO] [stderr] 2 | enum Option<T> {
[INFO] [stderr]   |      ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] test slides_in_sect_option_line_362 ... ok
[INFO] [stdout] test slides_in_sect_conditionals_match_line_248 ... ok
[INFO] [stdout] test slides_in_sect_functional_or_imperative_line_286 ... ok
[INFO] [stdout] Wesley is happy
[INFO] [stdout] test slides_in_sect_conditionals_if_line_231 ... ok
[INFO] [stderr] warning: unused variable: `sum`
[INFO] [stderr]  --> /tmp/rust-skeptic.s5i5n9AYqWoq/test.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let sum = add(2, 3);
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] test slides_in_sect_functions_line_217 ... ok
[INFO] [stdout] Rust Introduction
[INFO] [stdout] test slides_in_sect_introduction_line_25 ... ok
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> /tmp/rust-skeptic.6BcbwPzCijx9/test.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | for i in numbers.iter() {
[INFO] [stderr]   |     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> /tmp/rust-skeptic.6BcbwPzCijx9/test.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | for i in 0..10 {
[INFO] [stderr]   |     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stdout] test slides_in_sect_loops_line_268 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 21.07s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "57d169cbe4d34a5f69142a59d7f6bce2c899e74ec6742103edda64119997e06f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57d169cbe4d34a5f69142a59d7f6bce2c899e74ec6742103edda64119997e06f", kill_on_drop: false }`
[INFO] [stdout] 57d169cbe4d34a5f69142a59d7f6bce2c899e74ec6742103edda64119997e06f