[INFO] cloning repository https://github.com/juanmait/my-very-naive-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/juanmait/my-very-naive-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuanmait%2Fmy-very-naive-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuanmait%2Fmy-very-naive-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f39249b0f836255a5b739dd5d4d1ed0466c6cca2
[INFO] checking juanmait/my-very-naive-rust against master#80399064afa4a2cd153f30d02c25f7ea0383ed65 for opaque-soundness-fix
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuanmait%2Fmy-very-naive-rust" "/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/juanmait/my-very-naive-rust on toolchain 80399064afa4a2cd153f30d02c25f7ea0383ed65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/juanmait/my-very-naive-rust
[INFO] finished tweaking git repo https://github.com/juanmait/my-very-naive-rust
[INFO] tweaked toml for git repo https://github.com/juanmait/my-very-naive-rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/juanmait/my-very-naive-rust 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" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-0-tc1/source/array-iter/Cargo.toml: no edition set: defaulting to the 2015 edition
[INFO] [stderr] warning: /workspace/builds/worker-0-tc1/source/rev-range/Cargo.toml: no edition set: defaulting to the 2015 edition
[INFO] [stderr] warning: /workspace/builds/worker-0-tc1/source/block-test/Cargo.toml: no edition set: defaulting to the 2015 edition
[INFO] [stderr] warning: /workspace/builds/worker-0-tc1/source/guess-game/Cargo.toml: no edition set: defaulting to the 2015 edition
[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 juanmait/my-very-naive-rust against master#09bc67b9158392361780e779d32997f14cc75c39 for opaque-soundness-fix
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjuanmait%2Fmy-very-naive-rust" "/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/juanmait/my-very-naive-rust on toolchain 09bc67b9158392361780e779d32997f14cc75c39
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09bc67b9158392361780e779d32997f14cc75c39" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/juanmait/my-very-naive-rust
[INFO] finished tweaking git repo https://github.com/juanmait/my-very-naive-rust
[INFO] tweaked toml for git repo https://github.com/juanmait/my-very-naive-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/juanmait/my-very-naive-rust 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" "+09bc67b9158392361780e779d32997f14cc75c39" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-0-tc2/source/array-iter/Cargo.toml: no edition set: defaulting to the 2015 edition
[INFO] [stderr] warning: /workspace/builds/worker-0-tc2/source/guess-game/Cargo.toml: no edition set: defaulting to the 2015 edition
[INFO] [stderr] warning: /workspace/builds/worker-0-tc2/source/block-test/Cargo.toml: no edition set: defaulting to the 2015 edition
[INFO] [stderr] warning: /workspace/builds/worker-0-tc2/source/rev-range/Cargo.toml: no edition set: defaulting to the 2015 edition
[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" "+09bc67b9158392361780e779d32997f14cc75c39" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b571c39904893bfcf001da785bb8cfd53891f830b6b6322c605d50c060f06884
[INFO] running `Command { std: "docker" "start" "-a" "b571c39904893bfcf001da785bb8cfd53891f830b6b6322c605d50c060f06884", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b571c39904893bfcf001da785bb8cfd53891f830b6b6322c605d50c060f06884", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b571c39904893bfcf001da785bb8cfd53891f830b6b6322c605d50c060f06884", kill_on_drop: false }`
[INFO] [stdout] b571c39904893bfcf001da785bb8cfd53891f830b6b6322c605d50c060f06884
[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" "+09bc67b9158392361780e779d32997f14cc75c39" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a07100108aea0051005d2086d4f49da796b37f4f1ab1c181686520fa0c51a73d
[INFO] running `Command { std: "docker" "start" "-a" "a07100108aea0051005d2086d4f49da796b37f4f1ab1c181686520fa0c51a73d", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/rev-range/Cargo.toml: no edition set: defaulting to the 2015 edition
[INFO] [stderr] warning: /opt/rustwide/workdir/array-iter/Cargo.toml: no edition set: defaulting to the 2015 edition
[INFO] [stderr] warning: /opt/rustwide/workdir/guess-game/Cargo.toml: no edition set: defaulting to the 2015 edition
[INFO] [stderr] warning: /opt/rustwide/workdir/block-test/Cargo.toml: no edition set: defaulting to the 2015 edition
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]     Checking _traits v0.1.0 (/opt/rustwide/workdir/_traits)
[INFO] [stderr]     Checking array-iter v0.1.0 (/opt/rustwide/workdir/array-iter)
[INFO] [stderr]     Checking block-test v0.1.0 (/opt/rustwide/workdir/block-test)
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]     Checking rev-range v0.1.0 (/opt/rustwide/workdir/rev-range)
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_pcg v0.1.1
[INFO] [stderr]     Checking hello-rust v0.1.0 (/opt/rustwide/workdir/guess-game)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.30s
[INFO] running `Command { std: "docker" "inspect" "a07100108aea0051005d2086d4f49da796b37f4f1ab1c181686520fa0c51a73d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a07100108aea0051005d2086d4f49da796b37f4f1ab1c181686520fa0c51a73d", kill_on_drop: false }`
[INFO] [stdout] a07100108aea0051005d2086d4f49da796b37f4f1ab1c181686520fa0c51a73d