[INFO] updating cached repository https://github.com/jaredonline/rust-skip-list
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 31e304a8a8ec2c917e47b7c4cfc3a84fe46768ea
[INFO] testing jaredonline/rust-skip-list against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaredonline%2Frust-skip-list" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jaredonline/rust-skip-list on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jaredonline/rust-skip-list
[INFO] finished tweaking git repo https://github.com/jaredonline/rust-skip-list
[INFO] tweaked toml for git repo https://github.com/jaredonline/rust-skip-list written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/jaredonline/rust-skip-list already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-12/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stdout] 50c126429ece8007164ac675a5099c2675bdb7325954d416696091375391cdf7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "50c126429ece8007164ac675a5099c2675bdb7325954d416696091375391cdf7"`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling linked-list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:235:14
[INFO] [stderr]     |
[INFO] [stderr] 235 |     for i in (0 .. 10) {
[INFO] [stderr]     |              ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:245:14
[INFO] [stderr]     |
[INFO] [stderr] 245 |     for i in (0 .. 10) {
[INFO] [stderr]     |              ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:259:14
[INFO] [stderr]     |
[INFO] [stderr] 259 |     for i in (0 .. 10) {
[INFO] [stderr]     |              ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:265:14
[INFO] [stderr]     |
[INFO] [stderr] 265 |     for i in (0 .. 100) {
[INFO] [stderr]     |              ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_node_count`
[INFO] [stderr]   --> src/main.rs:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn get_node_count() -> usize {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.19s
[INFO] running `"docker" "inspect" "50c126429ece8007164ac675a5099c2675bdb7325954d416696091375391cdf7"`
[INFO] running `"docker" "rm" "-f" "50c126429ece8007164ac675a5099c2675bdb7325954d416696091375391cdf7"`
[INFO] [stdout] 50c126429ece8007164ac675a5099c2675bdb7325954d416696091375391cdf7
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stdout] 72275c522323b5bf934215173807149c38e279c2f5afc98a2f1190de438955a2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "72275c522323b5bf934215173807149c38e279c2f5afc98a2f1190de438955a2"`
[INFO] [stderr]    Compiling linked-list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:301:18
[INFO] [stderr]     |
[INFO] [stderr] 301 |         for i in (0 .. 100) {
[INFO] [stderr]     |                  ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:305:18
[INFO] [stderr]     |
[INFO] [stderr] 305 |         for i in (0 .. 100) {
[INFO] [stderr]     |                  ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:313:18
[INFO] [stderr]     |
[INFO] [stderr] 313 |         for i in (0 .. 100) {
[INFO] [stderr]     |                  ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:328:18
[INFO] [stderr]     |
[INFO] [stderr] 328 |         for i in (1 .. 1000) {
[INFO] [stderr]     |                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:344:22
[INFO] [stderr]     |
[INFO] [stderr] 344 |             for i in (0 .. 7) {
[INFO] [stderr]     |                      ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `"docker" "inspect" "72275c522323b5bf934215173807149c38e279c2f5afc98a2f1190de438955a2"`
[INFO] running `"docker" "rm" "-f" "72275c522323b5bf934215173807149c38e279c2f5afc98a2f1190de438955a2"`
[INFO] [stdout] 72275c522323b5bf934215173807149c38e279c2f5afc98a2f1190de438955a2
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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" "+28742a1146f10a4f09369baad027a464acb7a766" "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] ee7a90958585bdc68d1f9ba97ee159a8ee44e3a0f131448472f0250df18a7469
[INFO] running `"docker" "start" "-a" "ee7a90958585bdc68d1f9ba97ee159a8ee44e3a0f131448472f0250df18a7469"`
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:301:18
[INFO] [stderr]     |
[INFO] [stderr] 301 |         for i in (0 .. 100) {
[INFO] [stderr]     |                  ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:305:18
[INFO] [stderr]     |
[INFO] [stderr] 305 |         for i in (0 .. 100) {
[INFO] [stderr]     |                  ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:313:18
[INFO] [stderr]     |
[INFO] [stderr] 313 |         for i in (0 .. 100) {
[INFO] [stderr]     |                  ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:328:18
[INFO] [stderr]     |
[INFO] [stderr] 328 |         for i in (1 .. 1000) {
[INFO] [stderr]     |                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/main.rs:344:22
[INFO] [stderr]     |
[INFO] [stderr] 344 |             for i in (0 .. 7) {
[INFO] [stderr]     |                      ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/linked_list-53d2cc814d05a960
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test test::nodes_should_not_leak ... ok
[INFO] [stdout] test test::insert_increments_length ... ok
[INFO] [stdout] test test::many_inserts_and_iteration ... ok
[INFO] [stdout] test test::insert_at_for_two_values ... ok
[INFO] [stdout] test test::insert_at_for_one_value ... ok
[INFO] [stdout] test test::many_inserts ... ok
[INFO] [stdout] test test::many_inserts_lookup_iterations_should_be_less_than_items ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "ee7a90958585bdc68d1f9ba97ee159a8ee44e3a0f131448472f0250df18a7469"`
[INFO] running `"docker" "rm" "-f" "ee7a90958585bdc68d1f9ba97ee159a8ee44e3a0f131448472f0250df18a7469"`
[INFO] [stdout] ee7a90958585bdc68d1f9ba97ee159a8ee44e3a0f131448472f0250df18a7469