[INFO] cloning repository https://github.com/dl-watson/rust_islands
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dl-watson/rust_islands" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdl-watson%2Frust_islands", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdl-watson%2Frust_islands'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 16ae35dd92135f740bc1ee1f40378ce3d339cd87
[INFO] testing dl-watson/rust_islands against try#16fbf98f22730e073c09e7b03f0eafb87a295545 for pr-145628
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdl-watson%2Frust_islands" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dl-watson/rust_islands
[INFO] finished tweaking git repo https://github.com/dl-watson/rust_islands
[INFO] tweaked toml for git repo https://github.com/dl-watson/rust_islands written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dl-watson/rust_islands on toolchain 16fbf98f22730e073c09e7b03f0eafb87a295545
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dl-watson/rust_islands 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" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "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] testing dl-watson/rust_islands against try#16fbf98f22730e073c09e7b03f0eafb87a295545 for pr-145628
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdl-watson%2Frust_islands" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dl-watson/rust_islands
[INFO] finished tweaking git repo https://github.com/dl-watson/rust_islands
[INFO] tweaked toml for git repo https://github.com/dl-watson/rust_islands written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dl-watson/rust_islands on toolchain 16fbf98f22730e073c09e7b03f0eafb87a295545
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dl-watson/rust_islands 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" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f3f26140fe72cbed32aefe7e4edb7e9b290e40e93ba4c96ddaa86464c3b2d28a
[INFO] running `Command { std: "docker" "start" "-a" "f3f26140fe72cbed32aefe7e4edb7e9b290e40e93ba4c96ddaa86464c3b2d28a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3f26140fe72cbed32aefe7e4edb7e9b290e40e93ba4c96ddaa86464c3b2d28a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3f26140fe72cbed32aefe7e4edb7e9b290e40e93ba4c96ddaa86464c3b2d28a", kill_on_drop: false }`
[INFO] [stdout] f3f26140fe72cbed32aefe7e4edb7e9b290e40e93ba4c96ddaa86464c3b2d28a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ffc338ab483c3cf14a6b96c68aa038f93240a4334df461779b90db815f6ea05
[INFO] running `Command { std: "docker" "start" "-a" "5ffc338ab483c3cf14a6b96c68aa038f93240a4334df461779b90db815f6ea05", kill_on_drop: false }`
[INFO] [stderr]    Compiling islands v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `SafeDisjointSet` is never constructed
[INFO] [stdout]   --> src/disjoint.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub struct SafeDisjointSet(DisjointSet);
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `find` are never used
[INFO] [stdout]    --> src/disjoint.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl SafeDisjointSet {
[INFO] [stdout]     | -------------------- associated items in this implementation
[INFO] [stdout] 100 |     pub fn new(size: usize) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     pub fn find(&self, key: i32) -> Option<i32> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "5ffc338ab483c3cf14a6b96c68aa038f93240a4334df461779b90db815f6ea05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ffc338ab483c3cf14a6b96c68aa038f93240a4334df461779b90db815f6ea05", kill_on_drop: false }`
[INFO] [stdout] 5ffc338ab483c3cf14a6b96c68aa038f93240a4334df461779b90db815f6ea05
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ed4d595846d9ee4fba140a204f2a4fc39fd56ad42c557e3a396aaed7abff099
[INFO] running `Command { std: "docker" "start" "-a" "8ed4d595846d9ee4fba140a204f2a4fc39fd56ad42c557e3a396aaed7abff099", kill_on_drop: false }`
[INFO] [stderr]    Compiling islands v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `SafeDisjointSet` is never constructed
[INFO] [stdout]   --> src/disjoint.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub struct SafeDisjointSet(DisjointSet);
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `find` are never used
[INFO] [stdout]    --> src/disjoint.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl SafeDisjointSet {
[INFO] [stdout]     | -------------------- associated items in this implementation
[INFO] [stdout] 100 |     pub fn new(size: usize) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     pub fn find(&self, key: i32) -> Option<i32> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "8ed4d595846d9ee4fba140a204f2a4fc39fd56ad42c557e3a396aaed7abff099", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ed4d595846d9ee4fba140a204f2a4fc39fd56ad42c557e3a396aaed7abff099", kill_on_drop: false }`
[INFO] [stdout] 8ed4d595846d9ee4fba140a204f2a4fc39fd56ad42c557e3a396aaed7abff099
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4c67feda2bf6db144f0aab61ad28a88106cc730535fb86de1f5c699641cacd46
[INFO] running `Command { std: "docker" "start" "-a" "4c67feda2bf6db144f0aab61ad28a88106cc730535fb86de1f5c699641cacd46", kill_on_drop: false }`
[INFO] [stderr] warning: struct `SafeDisjointSet` is never constructed
[INFO] [stderr]   --> src/disjoint.rs:97:12
[INFO] [stderr]    |
[INFO] [stderr] 97 | pub struct SafeDisjointSet(DisjointSet);
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `find` are never used
[INFO] [stderr]    --> src/disjoint.rs:100:12
[INFO] [stderr]     |
[INFO] [stderr]  99 | impl SafeDisjointSet {
[INFO] [stderr]     | -------------------- associated items in this implementation
[INFO] [stderr] 100 |     pub fn new(size: usize) -> Self {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 104 |     pub fn find(&self, key: i32) -> Option<i32> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `islands` (bin "islands" test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/islands-bddc8840f2e190f2)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test disjoint::tests::neither_are_identifier ... ok
[INFO] [stdout] test disjoint::tests::num_are_own_identifier ... ok
[INFO] [stdout] test disjoint::tests::union ... ok
[INFO] [stdout] test disjoint::tests::one_isnt_an_identifier ... ok
[INFO] [stdout] test disjoint::tests::find ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4c67feda2bf6db144f0aab61ad28a88106cc730535fb86de1f5c699641cacd46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c67feda2bf6db144f0aab61ad28a88106cc730535fb86de1f5c699641cacd46", kill_on_drop: false }`
[INFO] [stdout] 4c67feda2bf6db144f0aab61ad28a88106cc730535fb86de1f5c699641cacd46