[INFO] cloning repository https://github.com/mayant15/potential-fishstick
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mayant15/potential-fishstick" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayant15%2Fpotential-fishstick", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayant15%2Fpotential-fishstick'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbb2a983b1d56e55048af64ad4311065545435e3
[INFO] checking mayant15/potential-fishstick against master#e9271846294c4ee5bd7706df68180320c0b5ff20 for pr-119820
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayant15%2Fpotential-fishstick" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mayant15/potential-fishstick on toolchain e9271846294c4ee5bd7706df68180320c0b5ff20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e9271846294c4ee5bd7706df68180320c0b5ff20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mayant15/potential-fishstick
[INFO] finished tweaking git repo https://github.com/mayant15/potential-fishstick
[INFO] tweaked toml for git repo https://github.com/mayant15/potential-fishstick written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mayant15/potential-fishstick 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" "+e9271846294c4ee5bd7706df68180320c0b5ff20" "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 mayant15/potential-fishstick against try#b69bfeecc49bf5661cf54497638430035ff61aa4 for pr-119820
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayant15%2Fpotential-fishstick" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mayant15/potential-fishstick on toolchain b69bfeecc49bf5661cf54497638430035ff61aa4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mayant15/potential-fishstick
[INFO] finished tweaking git repo https://github.com/mayant15/potential-fishstick
[INFO] tweaked toml for git repo https://github.com/mayant15/potential-fishstick written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mayant15/potential-fishstick 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" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "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 mayant15/potential-fishstick against try#b69bfeecc49bf5661cf54497638430035ff61aa4 for pr-119820
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayant15%2Fpotential-fishstick" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mayant15/potential-fishstick on toolchain b69bfeecc49bf5661cf54497638430035ff61aa4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mayant15/potential-fishstick
[INFO] finished tweaking git repo https://github.com/mayant15/potential-fishstick
[INFO] tweaked toml for git repo https://github.com/mayant15/potential-fishstick written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mayant15/potential-fishstick 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" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 73428d566c0e15473187cfd30a747ab3a9f794d242422fcbbd69df3912aa0882
[INFO] running `Command { std: "docker" "start" "-a" "73428d566c0e15473187cfd30a747ab3a9f794d242422fcbbd69df3912aa0882", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73428d566c0e15473187cfd30a747ab3a9f794d242422fcbbd69df3912aa0882", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73428d566c0e15473187cfd30a747ab3a9f794d242422fcbbd69df3912aa0882", kill_on_drop: false }`
[INFO] [stdout] 73428d566c0e15473187cfd30a747ab3a9f794d242422fcbbd69df3912aa0882
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55d5f43239ed3f1aa1e58fee22cb28109aad067f3ab4024d867bc397451d648c
[INFO] running `Command { std: "docker" "start" "-a" "55d5f43239ed3f1aa1e58fee22cb28109aad067f3ab4024d867bc397451d648c", kill_on_drop: false }`
[INFO] [stderr]     Checking concolic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]    --> src/main.rs:188:21
[INFO] [stdout]     |
[INFO] [stdout] 188 | fn solve_for_inputs(path: &Vec<Constraint>) -> Vec<(Symbol, usize)> {
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]    --> src/main.rs:188:21
[INFO] [stdout]     |
[INFO] [stdout] 188 | fn solve_for_inputs(path: &Vec<Constraint>) -> Vec<(Symbol, usize)> {
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `LessThan`, `Equal`, and `GreaterThanOrEqual` are never constructed
[INFO] [stdout]    --> src/main.rs:244:5
[INFO] [stdout]     |
[INFO] [stdout] 243 | enum ConstraintOperator {
[INFO] [stdout]     |      ------------------ variants in this enum
[INFO] [stdout] 244 |     LessThan,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 245 |     LessThanOrEqual,
[INFO] [stdout] 246 |     Equal,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 247 |     GreaterThan,
[INFO] [stdout] 248 |     GreaterThanOrEqual,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ConstraintOperator` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `LessThan`, `Equal`, and `GreaterThanOrEqual` are never constructed
[INFO] [stdout]    --> src/main.rs:244:5
[INFO] [stdout]     |
[INFO] [stdout] 243 | enum ConstraintOperator {
[INFO] [stdout]     |      ------------------ variants in this enum
[INFO] [stdout] 244 |     LessThan,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 245 |     LessThanOrEqual,
[INFO] [stdout] 246 |     Equal,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 247 |     GreaterThan,
[INFO] [stdout] 248 |     GreaterThanOrEqual,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ConstraintOperator` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "55d5f43239ed3f1aa1e58fee22cb28109aad067f3ab4024d867bc397451d648c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55d5f43239ed3f1aa1e58fee22cb28109aad067f3ab4024d867bc397451d648c", kill_on_drop: false }`
[INFO] [stdout] 55d5f43239ed3f1aa1e58fee22cb28109aad067f3ab4024d867bc397451d648c