[INFO] cloning repository https://github.com/purefunctor/tabled-typeclass-resolution
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/purefunctor/tabled-typeclass-resolution" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpurefunctor%2Ftabled-typeclass-resolution", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpurefunctor%2Ftabled-typeclass-resolution'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5dd1bf2f681042ebe0753fe4543fe87e64eda3b6
[INFO] checking purefunctor/tabled-typeclass-resolution against master#96df4943409564a187894018f15f795426dc2e1f for pr-118968
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpurefunctor%2Ftabled-typeclass-resolution" "/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/purefunctor/tabled-typeclass-resolution on toolchain 96df4943409564a187894018f15f795426dc2e1f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+96df4943409564a187894018f15f795426dc2e1f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/purefunctor/tabled-typeclass-resolution
[INFO] finished tweaking git repo https://github.com/purefunctor/tabled-typeclass-resolution
[INFO] tweaked toml for git repo https://github.com/purefunctor/tabled-typeclass-resolution written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/purefunctor/tabled-typeclass-resolution 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" "+96df4943409564a187894018f15f795426dc2e1f" "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 purefunctor/tabled-typeclass-resolution against try#7e4f74fb8736fea8f455bb6e094122965ae8f4cd for pr-118968
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpurefunctor%2Ftabled-typeclass-resolution" "/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/purefunctor/tabled-typeclass-resolution on toolchain 7e4f74fb8736fea8f455bb6e094122965ae8f4cd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/purefunctor/tabled-typeclass-resolution
[INFO] finished tweaking git repo https://github.com/purefunctor/tabled-typeclass-resolution
[INFO] tweaked toml for git repo https://github.com/purefunctor/tabled-typeclass-resolution written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/purefunctor/tabled-typeclass-resolution 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" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "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" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d423a11fdafdee22e028d77a20aa287a6e9f00dae86402138735f339ed7bcf1e
[INFO] running `Command { std: "docker" "start" "-a" "d423a11fdafdee22e028d77a20aa287a6e9f00dae86402138735f339ed7bcf1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d423a11fdafdee22e028d77a20aa287a6e9f00dae86402138735f339ed7bcf1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d423a11fdafdee22e028d77a20aa287a6e9f00dae86402138735f339ed7bcf1e", kill_on_drop: false }`
[INFO] [stdout] d423a11fdafdee22e028d77a20aa287a6e9f00dae86402138735f339ed7bcf1e
[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" "+7e4f74fb8736fea8f455bb6e094122965ae8f4cd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7826a5edb1019ff95fc775b2f2f95f9a22a6179e6ab03e01a0d1d3bb6fb13ce
[INFO] running `Command { std: "docker" "start" "-a" "a7826a5edb1019ff95fc775b2f2f95f9a22a6179e6ab03e01a0d1d3bb6fb13ce", kill_on_drop: false }`
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking smol_str v0.2.0
[INFO] [stderr]     Checking archery v0.5.0
[INFO] [stderr]     Checking rpds v0.13.0
[INFO] [stderr]     Checking tabled-typeclass-resolution v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `subgoal`
[INFO] [stdout]   --> src/lib.rs:99:30
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn try_answer(&mut self, subgoal: &Assertion, answer: &Assertion) -> bool {
[INFO] [stdout]    |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subgoal`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `answer`
[INFO] [stdout]   --> src/lib.rs:99:51
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn try_answer(&mut self, subgoal: &Assertion, answer: &Assertion) -> bool {
[INFO] [stdout]    |                                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_answer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subgoal`
[INFO] [stdout]   --> src/lib.rs:99:30
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn try_answer(&mut self, subgoal: &Assertion, answer: &Assertion) -> bool {
[INFO] [stdout]    |                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subgoal`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `answer`
[INFO] [stdout]   --> src/lib.rs:99:51
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn try_answer(&mut self, subgoal: &Assertion, answer: &Assertion) -> bool {
[INFO] [stdout]    |                                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_answer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `goal`
[INFO] [stdout]    --> src/lib.rs:103:31
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn try_resolve(&mut self, goal: &Assertion, instance: &Instance) -> Option<List<Assertion>> {
[INFO] [stdout]     |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_goal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `instance`
[INFO] [stdout]    --> src/lib.rs:103:49
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn try_resolve(&mut self, goal: &Assertion, instance: &Instance) -> Option<List<Assertion>> {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instance`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `goal`
[INFO] [stdout]    --> src/lib.rs:103:31
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn try_resolve(&mut self, goal: &Assertion, instance: &Instance) -> Option<List<Assertion>> {
[INFO] [stdout]     |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_goal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `instance`
[INFO] [stdout]    --> src/lib.rs:103:49
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn try_resolve(&mut self, goal: &Assertion, instance: &Instance) -> Option<List<Assertion>> {
[INFO] [stdout]     |                                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instance`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `assertion` and `dependencies` are never read
[INFO] [stdout]   --> src/lib.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Instance {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 24 |     assertion: Assertion,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 25 |     dependencies: List<Assertion>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instance` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `assertion` and `dependencies` are never read
[INFO] [stdout]   --> src/lib.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Instance {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 24 |     assertion: Assertion,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 25 |     dependencies: List<Assertion>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Instance` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "a7826a5edb1019ff95fc775b2f2f95f9a22a6179e6ab03e01a0d1d3bb6fb13ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7826a5edb1019ff95fc775b2f2f95f9a22a6179e6ab03e01a0d1d3bb6fb13ce", kill_on_drop: false }`
[INFO] [stdout] a7826a5edb1019ff95fc775b2f2f95f9a22a6179e6ab03e01a0d1d3bb6fb13ce