[INFO] cloning repository https://github.com/yashsriram/prob_rob
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yashsriram/prob_rob" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyashsriram%2Fprob_rob", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyashsriram%2Fprob_rob'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 526d0ff355a8ee0d1b9fd004f71016abe5ff1cb2
[INFO] checking yashsriram/prob_rob against try#b8ee37b59c6e1f39bae18b85e057975ab0d89308 for pr-139587-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyashsriram%2Fprob_rob" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yashsriram/prob_rob on toolchain b8ee37b59c6e1f39bae18b85e057975ab0d89308
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yashsriram/prob_rob
[INFO] finished tweaking git repo https://github.com/yashsriram/prob_rob
[INFO] tweaked toml for git repo https://github.com/yashsriram/prob_rob written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/yashsriram/prob_rob 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" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8562c0fb0af6ecce7d44f71e333737f07c6cf79d7f7f514b62ada7683ec12ac1
[INFO] running `Command { std: "docker" "start" "-a" "8562c0fb0af6ecce7d44f71e333737f07c6cf79d7f7f514b62ada7683ec12ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8562c0fb0af6ecce7d44f71e333737f07c6cf79d7f7f514b62ada7683ec12ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8562c0fb0af6ecce7d44f71e333737f07c6cf79d7f7f514b62ada7683ec12ac1", kill_on_drop: false }`
[INFO] [stdout] 8562c0fb0af6ecce7d44f71e333737f07c6cf79d7f7f514b62ada7683ec12ac1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+b8ee37b59c6e1f39bae18b85e057975ab0d89308" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f04c72db6ad21302273a0a33d557ccb4b32c5e4d5d78e0a243f0234af6e8076
[INFO] running `Command { std: "docker" "start" "-a" "3f04c72db6ad21302273a0a33d557ccb4b32c5e4d5d78e0a243f0234af6e8076", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking prob_rob v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `A` is never used
[INFO] [stdout]   --> examples/ch2-1.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 |     trait A {}
[INFO] [stdout]    |           ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `T` should have a snake case name
[INFO] [stdout]  --> examples/ch2-2.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let T = [
[INFO] [stdout]   |         ^ help: convert the identifier to snake case: `t`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.99s
[INFO] running `Command { std: "docker" "inspect" "3f04c72db6ad21302273a0a33d557ccb4b32c5e4d5d78e0a243f0234af6e8076", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f04c72db6ad21302273a0a33d557ccb4b32c5e4d5d78e0a243f0234af6e8076", kill_on_drop: false }`
[INFO] [stdout] 3f04c72db6ad21302273a0a33d557ccb4b32c5e4d5d78e0a243f0234af6e8076