[INFO] cloning repository https://github.com/zlmisme/skiplist
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zlmisme/skiplist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzlmisme%2Fskiplist"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzlmisme%2Fskiplist'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 49d4b6915bf5db274921d79b0074696606bbbf08
[INFO] testing zlmisme/skiplist against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzlmisme%2Fskiplist" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zlmisme/skiplist on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/zlmisme/skiplist
[INFO] finished tweaking git repo https://github.com/zlmisme/skiplist
[INFO] tweaked toml for git repo https://github.com/zlmisme/skiplist written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/zlmisme/skiplist already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7142207784fff257520bee8f9bab40acc23d20129687b9ceb2b349b306a7c657
[INFO] running `"docker" "start" "-a" "7142207784fff257520bee8f9bab40acc23d20129687b9ceb2b349b306a7c657"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling skiplist v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]  --> src/main.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Node {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LinkedList`
[INFO] [stderr]  --> src/main.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | struct LinkedList {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print`
[INFO] [stderr]    --> src/main.rs:115:12
[INFO] [stderr]     |
[INFO] [stderr] 115 |     pub fn print(&self) {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.74s
[INFO] running `"docker" "inspect" "7142207784fff257520bee8f9bab40acc23d20129687b9ceb2b349b306a7c657"`
[INFO] running `"docker" "rm" "-f" "7142207784fff257520bee8f9bab40acc23d20129687b9ceb2b349b306a7c657"`
[INFO] [stdout] 7142207784fff257520bee8f9bab40acc23d20129687b9ceb2b349b306a7c657
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fd4707425667ef255e4d3d60a0efc4e328bb95a4651861342605a92e05cbc2f0
[INFO] running `"docker" "start" "-a" "fd4707425667ef255e4d3d60a0efc4e328bb95a4651861342605a92e05cbc2f0"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling skiplist v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]  --> src/main.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Node {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LinkedList`
[INFO] [stderr]  --> src/main.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | struct LinkedList {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print`
[INFO] [stderr]    --> src/main.rs:115:12
[INFO] [stderr]     |
[INFO] [stderr] 115 |     pub fn print(&self) {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `"docker" "inspect" "fd4707425667ef255e4d3d60a0efc4e328bb95a4651861342605a92e05cbc2f0"`
[INFO] running `"docker" "rm" "-f" "fd4707425667ef255e4d3d60a0efc4e328bb95a4651861342605a92e05cbc2f0"`
[INFO] [stdout] fd4707425667ef255e4d3d60a0efc4e328bb95a4651861342605a92e05cbc2f0
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 95d64ed68b904de90966b91bba2c314b7b38dca1a808f5c4c35ac2ae33e9b2b9
[INFO] running `"docker" "start" "-a" "95d64ed68b904de90966b91bba2c314b7b38dca1a808f5c4c35ac2ae33e9b2b9"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]  --> src/main.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Node {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LinkedList`
[INFO] [stderr]  --> src/main.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | struct LinkedList {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print`
[INFO] [stderr]    --> src/main.rs:115:12
[INFO] [stderr]     |
[INFO] [stderr] 115 |     pub fn print(&self) {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/skiplist-4ae44b2b31fecd3b
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/skiplist-e6029960dc690140
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests skiplist
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "95d64ed68b904de90966b91bba2c314b7b38dca1a808f5c4c35ac2ae33e9b2b9"`
[INFO] running `"docker" "rm" "-f" "95d64ed68b904de90966b91bba2c314b7b38dca1a808f5c4c35ac2ae33e9b2b9"`
[INFO] [stdout] 95d64ed68b904de90966b91bba2c314b7b38dca1a808f5c4c35ac2ae33e9b2b9