[INFO] cloning repository https://github.com/zeapherine/rust-lessons
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zeapherine/rust-lessons" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeapherine%2Frust-lessons", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeapherine%2Frust-lessons'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e457301418f19e2b9559d106923722ce065e404e
[INFO] checking zeapherine/rust-lessons against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeapherine%2Frust-lessons" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zeapherine/rust-lessons on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zeapherine/rust-lessons
[INFO] finished tweaking git repo https://github.com/zeapherine/rust-lessons
[INFO] tweaked toml for git repo https://github.com/zeapherine/rust-lessons written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zeapherine/rust-lessons 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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking zeapherine/rust-lessons against try#72eda894eb3548c7ba774079ce0afab42958d4ee for pr-121848-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeapherine%2Frust-lessons" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zeapherine/rust-lessons on toolchain 72eda894eb3548c7ba774079ce0afab42958d4ee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zeapherine/rust-lessons
[INFO] finished tweaking git repo https://github.com/zeapherine/rust-lessons
[INFO] tweaked toml for git repo https://github.com/zeapherine/rust-lessons written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/zeapherine/rust-lessons 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" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "fetch" "--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
[ERROR] error running command: no output for 300 seconds
[INFO] checking zeapherine/rust-lessons against try#72eda894eb3548c7ba774079ce0afab42958d4ee for pr-121848-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeapherine%2Frust-lessons" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zeapherine/rust-lessons on toolchain 72eda894eb3548c7ba774079ce0afab42958d4ee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zeapherine/rust-lessons
[INFO] finished tweaking git repo https://github.com/zeapherine/rust-lessons
[INFO] tweaked toml for git repo https://github.com/zeapherine/rust-lessons written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/zeapherine/rust-lessons 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" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "fetch" "--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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 38e725894c9a880bbb5052b83c906699ef36ddccb3e22346397f92e2ec9490a2
[INFO] running `Command { std: "docker" "start" "-a" "38e725894c9a880bbb5052b83c906699ef36ddccb3e22346397f92e2ec9490a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38e725894c9a880bbb5052b83c906699ef36ddccb3e22346397f92e2ec9490a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38e725894c9a880bbb5052b83c906699ef36ddccb3e22346397f92e2ec9490a2", kill_on_drop: false }`
[INFO] [stdout] 38e725894c9a880bbb5052b83c906699ef36ddccb3e22346397f92e2ec9490a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+72eda894eb3548c7ba774079ce0afab42958d4ee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55aeaa4cebacd871b7a830906666fb3740496e009412cadadb95c0706bdd95e7
[INFO] running `Command { std: "docker" "start" "-a" "55aeaa4cebacd871b7a830906666fb3740496e009412cadadb95c0706bdd95e7", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-lessons v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0601]: `main` function not found in crate `control_flow_if_else`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider adding a `main` function to `src/bin/control_flow_if_else.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-lessons` (bin "control_flow_if_else") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]  --> src/bin/cwt-numeric-types.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let sum = 2 + 2;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]  --> src/bin/cwt-numeric-types.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let value = 10 - 5;
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `div`
[INFO] [stdout]  --> src/bin/cwt-numeric-types.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let div = 10/2;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_div`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mul`
[INFO] [stdout]  --> src/bin/cwt-numeric-types.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mul = 5 * 5;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_mul`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]  --> src/bin/cwt-numeric-types.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let sum = 2 + 2;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]  --> src/bin/cwt-numeric-types.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let value = 10 - 5;
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `div`
[INFO] [stdout]  --> src/bin/cwt-numeric-types.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let div = 10/2;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_div`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mul`
[INFO] [stdout]  --> src/bin/cwt-numeric-types.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mul = 5 * 5;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_mul`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "55aeaa4cebacd871b7a830906666fb3740496e009412cadadb95c0706bdd95e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55aeaa4cebacd871b7a830906666fb3740496e009412cadadb95c0706bdd95e7", kill_on_drop: false }`
[INFO] [stdout] 55aeaa4cebacd871b7a830906666fb3740496e009412cadadb95c0706bdd95e7