[INFO] cloning repository https://github.com/Spoonbender/rust-intro-demos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Spoonbender/rust-intro-demos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpoonbender%2Frust-intro-demos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpoonbender%2Frust-intro-demos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7c2c50f1bdf7a50fc484ac7d9f4e74240f24bdd2
[INFO] checking Spoonbender/rust-intro-demos against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpoonbender%2Frust-intro-demos" "/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/Spoonbender/rust-intro-demos on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Spoonbender/rust-intro-demos
[INFO] finished tweaking git repo https://github.com/Spoonbender/rust-intro-demos
[INFO] tweaked toml for git repo https://github.com/Spoonbender/rust-intro-demos written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Spoonbender/rust-intro-demos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3745fbc9cb32ca833190e77d70ede38f8654df07ba33eb97bc639439f60319a5
[INFO] running `Command { std: "docker" "start" "-a" "3745fbc9cb32ca833190e77d70ede38f8654df07ba33eb97bc639439f60319a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3745fbc9cb32ca833190e77d70ede38f8654df07ba33eb97bc639439f60319a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3745fbc9cb32ca833190e77d70ede38f8654df07ba33eb97bc639439f60319a5", kill_on_drop: false }`
[INFO] [stdout] 3745fbc9cb32ca833190e77d70ede38f8654df07ba33eb97bc639439f60319a5
[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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5378bfe1ae59d761a4d2658e72a8f532ac9257664c1d92d368699346fe2b31af
[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" "5378bfe1ae59d761a4d2658e72a8f532ac9257664c1d92d368699346fe2b31af", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rust-intro-demos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `do_something2`
[INFO] [stdout]   --> examples/errors.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn do_something2(file_name: &str) -> Result<()> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `do_something3`
[INFO] [stdout]   --> examples/errors.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn do_something3(file_name: &str) -> Result<()> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ops::DerefMut`
[INFO] [stdout]  --> examples/shared_state.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     ops::DerefMut,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main2`
[INFO] [stdout]   --> examples/shared_state.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn main2() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.99s
[INFO] running `Command { std: "docker" "inspect" "5378bfe1ae59d761a4d2658e72a8f532ac9257664c1d92d368699346fe2b31af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5378bfe1ae59d761a4d2658e72a8f532ac9257664c1d92d368699346fe2b31af", kill_on_drop: false }`
[INFO] [stdout] 5378bfe1ae59d761a4d2658e72a8f532ac9257664c1d92d368699346fe2b31af