[INFO] updating cached repository https://github.com/sirscratchalot/rustwordladder
[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] b6721e0c8e9ffd60ebade71f4b719d704c721d94
[INFO] testing sirscratchalot/rustwordladder against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsirscratchalot%2Frustwordladder" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sirscratchalot/rustwordladder on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/sirscratchalot/rustwordladder
[INFO] finished tweaking git repo https://github.com/sirscratchalot/rustwordladder
[INFO] tweaked toml for git repo https://github.com/sirscratchalot/rustwordladder written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/sirscratchalot/rustwordladder already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "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] 9680cd82f01e6770a9e65335eaa72c3c9bc98bd16fb45a6f84bfd747ee37f5da
[INFO] running `"docker" "start" "-a" "9680cd82f01e6770a9e65335eaa72c3c9bc98bd16fb45a6f84bfd747ee37f5da"`
[INFO] [stderr]    Compiling wordladder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:36:100
[INFO] [stderr]    |
[INFO] [stderr] 36 |         Err(why_man_why) => panic!("I just couldn't do it. I'm sorry. {} {}",file_path,why_man_why.description()),
[INFO] [stderr]    |                                                                                                    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/graph/mod.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |         for mut node in self.nodes.iter_mut() {
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.44s
[INFO] running `"docker" "inspect" "9680cd82f01e6770a9e65335eaa72c3c9bc98bd16fb45a6f84bfd747ee37f5da"`
[INFO] running `"docker" "rm" "-f" "9680cd82f01e6770a9e65335eaa72c3c9bc98bd16fb45a6f84bfd747ee37f5da"`
[INFO] [stdout] 9680cd82f01e6770a9e65335eaa72c3c9bc98bd16fb45a6f84bfd747ee37f5da
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "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] d03ac8ee0fe24d1c374608f2787c0aa0a9a9c2407bb2e0073af4d219cbbb00a1
[INFO] running `"docker" "start" "-a" "d03ac8ee0fe24d1c374608f2787c0aa0a9a9c2407bb2e0073af4d219cbbb00a1"`
[INFO] [stderr]    Compiling wordladder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:36:100
[INFO] [stderr]    |
[INFO] [stderr] 36 |         Err(why_man_why) => panic!("I just couldn't do it. I'm sorry. {} {}",file_path,why_man_why.description()),
[INFO] [stderr]    |                                                                                                    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/graph/mod.rs:198:12
[INFO] [stderr]     |
[INFO] [stderr] 198 |     for (i,node) in graph.nodes.iter().enumerate() {
[INFO] [stderr]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/graph/mod.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |         for mut node in self.nodes.iter_mut() {
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `"docker" "inspect" "d03ac8ee0fe24d1c374608f2787c0aa0a9a9c2407bb2e0073af4d219cbbb00a1"`
[INFO] running `"docker" "rm" "-f" "d03ac8ee0fe24d1c374608f2787c0aa0a9a9c2407bb2e0073af4d219cbbb00a1"`
[INFO] [stdout] d03ac8ee0fe24d1c374608f2787c0aa0a9a9c2407bb2e0073af4d219cbbb00a1
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "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] 8726b32cd58beb328be92b299ae17a542b577e93dea5c723e39f7006b179019c
[INFO] running `"docker" "start" "-a" "8726b32cd58beb328be92b299ae17a542b577e93dea5c723e39f7006b179019c"`
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:36:100
[INFO] [stderr]    |
[INFO] [stderr] 36 |         Err(why_man_why) => panic!("I just couldn't do it. I'm sorry. {} {}",file_path,why_man_why.description()),
[INFO] [stderr]    |                                                                                                    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/graph/mod.rs:198:12
[INFO] [stderr]     |
[INFO] [stderr] 198 |     for (i,node) in graph.nodes.iter().enumerate() {
[INFO] [stderr]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/graph/mod.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |         for mut node in self.nodes.iter_mut() {
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/wordladder-73299c118d1f835e
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test graph::tests::test_circular ... ok
[INFO] [stdout] test graph::tests::test_longest ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "8726b32cd58beb328be92b299ae17a542b577e93dea5c723e39f7006b179019c"`
[INFO] running `"docker" "rm" "-f" "8726b32cd58beb328be92b299ae17a542b577e93dea5c723e39f7006b179019c"`
[INFO] [stdout] 8726b32cd58beb328be92b299ae17a542b577e93dea5c723e39f7006b179019c