[INFO] cloning repository https://github.com/Shivam412/prefix-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Shivam412/prefix-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivam412%2Fprefix-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivam412%2Fprefix-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6892ac2c9211b76e10b8344885e4154b82660e58
[INFO] checking Shivam412/prefix-tree against master#0c1fb2a1e65a57073dc62dd502319a00cf753371 for pr-114655
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivam412%2Fprefix-tree" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Shivam412/prefix-tree on toolchain 0c1fb2a1e65a57073dc62dd502319a00cf753371
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c1fb2a1e65a57073dc62dd502319a00cf753371" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Shivam412/prefix-tree
[INFO] finished tweaking git repo https://github.com/Shivam412/prefix-tree
[INFO] tweaked toml for git repo https://github.com/Shivam412/prefix-tree written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Shivam412/prefix-tree 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" "+0c1fb2a1e65a57073dc62dd502319a00cf753371" "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 Shivam412/prefix-tree against try#1d06cad56a6e74d21cdf272bd6d9479160000fba for pr-114655
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivam412%2Fprefix-tree" "/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/Shivam412/prefix-tree on toolchain 1d06cad56a6e74d21cdf272bd6d9479160000fba
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Shivam412/prefix-tree
[INFO] finished tweaking git repo https://github.com/Shivam412/prefix-tree
[INFO] tweaked toml for git repo https://github.com/Shivam412/prefix-tree written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Shivam412/prefix-tree 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" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "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 Shivam412/prefix-tree against try#1d06cad56a6e74d21cdf272bd6d9479160000fba for pr-114655
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivam412%2Fprefix-tree" "/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/Shivam412/prefix-tree on toolchain 1d06cad56a6e74d21cdf272bd6d9479160000fba
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Shivam412/prefix-tree
[INFO] finished tweaking git repo https://github.com/Shivam412/prefix-tree
[INFO] tweaked toml for git repo https://github.com/Shivam412/prefix-tree written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Shivam412/prefix-tree 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" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7238c201d858ee72fc8e60b4eec7acc8d9c7861f5f1a0bedcac99dd8f1af2b66
[INFO] running `Command { std: "docker" "start" "-a" "7238c201d858ee72fc8e60b4eec7acc8d9c7861f5f1a0bedcac99dd8f1af2b66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7238c201d858ee72fc8e60b4eec7acc8d9c7861f5f1a0bedcac99dd8f1af2b66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7238c201d858ee72fc8e60b4eec7acc8d9c7861f5f1a0bedcac99dd8f1af2b66", kill_on_drop: false }`
[INFO] [stdout] 7238c201d858ee72fc8e60b4eec7acc8d9c7861f5f1a0bedcac99dd8f1af2b66
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e54e45d7c418237833ea3f9d121425b36be8039ecff50310c52a1ea9505d9454
[INFO] running `Command { std: "docker" "start" "-a" "e54e45d7c418237833ea3f9d121425b36be8039ecff50310c52a1ea9505d9454", kill_on_drop: false }`
[INFO] [stderr]     Checking prefix-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] running `Command { std: "docker" "inspect" "e54e45d7c418237833ea3f9d121425b36be8039ecff50310c52a1ea9505d9454", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e54e45d7c418237833ea3f9d121425b36be8039ecff50310c52a1ea9505d9454", kill_on_drop: false }`
[INFO] [stdout] e54e45d7c418237833ea3f9d121425b36be8039ecff50310c52a1ea9505d9454