[INFO] cloning repository https://github.com/sirscratchalot/rustwordladder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sirscratchalot/rustwordladder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsirscratchalot%2Frustwordladder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsirscratchalot%2Frustwordladder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b6721e0c8e9ffd60ebade71f4b719d704c721d94
[INFO] testing sirscratchalot/rustwordladder against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsirscratchalot%2Frustwordladder" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sirscratchalot/rustwordladder on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-6/source/Cargo.toml
[INFO] crate git repo https://github.com/sirscratchalot/rustwordladder already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ecd595fd439ba7596f71d44d3350a6e16e8b8e188ce9f48a4640ddb574cb5db3
[INFO] running `Command { std: "docker" "start" "-a" "ecd595fd439ba7596f71d44d3350a6e16e8b8e188ce9f48a4640ddb574cb5db3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ecd595fd439ba7596f71d44d3350a6e16e8b8e188ce9f48a4640ddb574cb5db3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecd595fd439ba7596f71d44d3350a6e16e8b8e188ce9f48a4640ddb574cb5db3", kill_on_drop: false }`
[INFO] [stdout] ecd595fd439ba7596f71d44d3350a6e16e8b8e188ce9f48a4640ddb574cb5db3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60f5e25ffa01a2d31e0c966996cf6055d4837ab3fe62029ab252c865d0e7db5c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "60f5e25ffa01a2d31e0c966996cf6055d4837ab3fe62029ab252c865d0e7db5c", kill_on_drop: false }`
[INFO] [stderr]    Compiling wordladder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:36:100
[INFO] [stdout]    |
[INFO] [stdout] 36 |         Err(why_man_why) => panic!("I just couldn't do it. I'm sorry. {} {}",file_path,why_man_why.description()),
[INFO] [stdout]    |                                                                                                    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/graph/mod.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |         for mut node in self.nodes.iter_mut() {
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `Command { std: "docker" "inspect" "60f5e25ffa01a2d31e0c966996cf6055d4837ab3fe62029ab252c865d0e7db5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60f5e25ffa01a2d31e0c966996cf6055d4837ab3fe62029ab252c865d0e7db5c", kill_on_drop: false }`
[INFO] [stdout] 60f5e25ffa01a2d31e0c966996cf6055d4837ab3fe62029ab252c865d0e7db5c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0adc24237006e16c146c4ce0cc204dc94d03bb8b4d5d680b5a1fdefc027544be
[INFO] running `Command { std: "docker" "start" "-a" "0adc24237006e16c146c4ce0cc204dc94d03bb8b4d5d680b5a1fdefc027544be", kill_on_drop: false }`
[INFO] [stderr]    Compiling wordladder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:36:100
[INFO] [stdout]    |
[INFO] [stdout] 36 |         Err(why_man_why) => panic!("I just couldn't do it. I'm sorry. {} {}",file_path,why_man_why.description()),
[INFO] [stdout]    |                                                                                                    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]    --> src/graph/mod.rs:198:12
[INFO] [stdout]     |
[INFO] [stdout] 198 |     for (i,node) in graph.nodes.iter().enumerate() {
[INFO] [stdout]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/graph/mod.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |         for mut node in self.nodes.iter_mut() {
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "0adc24237006e16c146c4ce0cc204dc94d03bb8b4d5d680b5a1fdefc027544be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0adc24237006e16c146c4ce0cc204dc94d03bb8b4d5d680b5a1fdefc027544be", kill_on_drop: false }`
[INFO] [stdout] 0adc24237006e16c146c4ce0cc204dc94d03bb8b4d5d680b5a1fdefc027544be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 47543c2c03842d712219863ec9a63834969e1ee68c7eaae1987de96118c69241
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "47543c2c03842d712219863ec9a63834969e1ee68c7eaae1987de96118c69241", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated associated function `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: `wordladder` (bin "wordladder" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/wordladder-960326f2bacc2d1b)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "47543c2c03842d712219863ec9a63834969e1ee68c7eaae1987de96118c69241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47543c2c03842d712219863ec9a63834969e1ee68c7eaae1987de96118c69241", kill_on_drop: false }`
[INFO] [stdout] 47543c2c03842d712219863ec9a63834969e1ee68c7eaae1987de96118c69241