[INFO] cloning repository https://github.com/jrmoulton/rust_interview_questions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jrmoulton/rust_interview_questions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjrmoulton%2Frust_interview_questions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjrmoulton%2Frust_interview_questions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3b4e189dbab14403930d9416fba3c5a01baf51ae
[INFO] building jrmoulton/rust_interview_questions against master#ad211ced81509462cdfe4c29ed10f97279a0acae for pr-135216-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjrmoulton%2Frust_interview_questions" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jrmoulton/rust_interview_questions on toolchain ad211ced81509462cdfe4c29ed10f97279a0acae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jrmoulton/rust_interview_questions
[INFO] finished tweaking git repo https://github.com/jrmoulton/rust_interview_questions
[INFO] tweaked toml for git repo https://github.com/jrmoulton/rust_interview_questions written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jrmoulton/rust_interview_questions already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-sink v0.3.23
[INFO] [stderr]   Downloaded futures-task v0.3.23
[INFO] [stderr]   Downloaded memchr v2.3.4
[INFO] [stderr]   Downloaded futures v0.3.23
[INFO] [stderr]   Downloaded pin-project-lite v0.2.9
[INFO] [stderr]   Downloaded slab v0.4.2
[INFO] [stderr]   Downloaded futures-io v0.3.23
[INFO] [stderr]   Downloaded futures-channel v0.3.23
[INFO] [stderr]   Downloaded proc-macro2 v1.0.24
[INFO] [stderr]   Downloaded futures-executor v0.3.23
[INFO] [stderr]   Downloaded futures-core v0.3.23
[INFO] [stderr]   Downloaded unicode-xid v0.2.1
[INFO] [stderr]   Downloaded quote v1.0.7
[INFO] [stderr]   Downloaded futures-util v0.3.23
[INFO] [stderr]   Downloaded futures-macro v0.3.23
[INFO] [stderr]   Downloaded syn v1.0.67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea261ccd972eb4f64e8cf4a97fa5c645ef1036ec4019042260ed53021febbabb
[INFO] running `Command { std: "docker" "start" "-a" "ea261ccd972eb4f64e8cf4a97fa5c645ef1036ec4019042260ed53021febbabb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea261ccd972eb4f64e8cf4a97fa5c645ef1036ec4019042260ed53021febbabb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea261ccd972eb4f64e8cf4a97fa5c645ef1036ec4019042260ed53021febbabb", kill_on_drop: false }`
[INFO] [stdout] ea261ccd972eb4f64e8cf4a97fa5c645ef1036ec4019042260ed53021febbabb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70b56a540826828621a40f9e0b804380a0b6c4d81c9a7fd06bc05cc6630fca92
[INFO] running `Command { std: "docker" "start" "-a" "70b56a540826828621a40f9e0b804380a0b6c4d81c9a7fd06bc05cc6630fca92", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling futures-core v0.3.23
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]    Compiling futures-task v0.3.23
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling futures-channel v0.3.23
[INFO] [stderr]    Compiling futures-sink v0.3.23
[INFO] [stderr]    Compiling futures-util v0.3.23
[INFO] [stderr]    Compiling futures-io v0.3.23
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling futures-macro v0.3.23
[INFO] [stderr]    Compiling futures-executor v0.3.23
[INFO] [stderr]    Compiling futures v0.3.23
[INFO] [stderr]    Compiling interview_questions v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `MyString` is never used
[INFO] [stdout]  --> src/divide_ints.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait MyString {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::slice::Iter` that must be used
[INFO] [stdout]   --> src/long_sum.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     s.iter();
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let _ = s.iter();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.03s
[INFO] running `Command { std: "docker" "inspect" "70b56a540826828621a40f9e0b804380a0b6c4d81c9a7fd06bc05cc6630fca92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70b56a540826828621a40f9e0b804380a0b6c4d81c9a7fd06bc05cc6630fca92", kill_on_drop: false }`
[INFO] [stdout] 70b56a540826828621a40f9e0b804380a0b6c4d81c9a7fd06bc05cc6630fca92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42d023c1aba1de05b8e15e8a53047e171202750d4a1858e15cf304576043ce02
[INFO] running `Command { std: "docker" "start" "-a" "42d023c1aba1de05b8e15e8a53047e171202750d4a1858e15cf304576043ce02", kill_on_drop: false }`
[INFO] [stderr]    Compiling interview_questions v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `MyString` is never used
[INFO] [stdout]  --> src/divide_ints.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait MyString {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::slice::Iter` that must be used
[INFO] [stdout]   --> src/long_sum.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     s.iter();
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let _ = s.iter();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MyString` is never used
[INFO] [stdout]  --> src/divide_ints.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait MyString {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::slice::Iter` that must be used
[INFO] [stdout]   --> src/long_sum.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     s.iter();
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let _ = s.iter();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "42d023c1aba1de05b8e15e8a53047e171202750d4a1858e15cf304576043ce02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42d023c1aba1de05b8e15e8a53047e171202750d4a1858e15cf304576043ce02", kill_on_drop: false }`
[INFO] [stdout] 42d023c1aba1de05b8e15e8a53047e171202750d4a1858e15cf304576043ce02
