[INFO] cloning repository https://github.com/GroupTheorist12/permutation_operations
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/GroupTheorist12/permutation_operations" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGroupTheorist12%2Fpermutation_operations", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGroupTheorist12%2Fpermutation_operations'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e27d57023188888c8c64a82cb287ea2a6f37665c
[INFO] building GroupTheorist12/permutation_operations against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGroupTheorist12%2Fpermutation_operations" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/GroupTheorist12/permutation_operations on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/GroupTheorist12/permutation_operations
[INFO] finished tweaking git repo https://github.com/GroupTheorist12/permutation_operations
[INFO] tweaked toml for git repo https://github.com/GroupTheorist12/permutation_operations written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/GroupTheorist12/permutation_operations 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 422ab4e497a1c5fdf94fa5107a2d59e78a955330419427b9494166ef75085b4e
[INFO] running `Command { std: "docker" "start" "-a" "422ab4e497a1c5fdf94fa5107a2d59e78a955330419427b9494166ef75085b4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "422ab4e497a1c5fdf94fa5107a2d59e78a955330419427b9494166ef75085b4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "422ab4e497a1c5fdf94fa5107a2d59e78a955330419427b9494166ef75085b4e", kill_on_drop: false }`
[INFO] [stdout] 422ab4e497a1c5fdf94fa5107a2d59e78a955330419427b9494166ef75085b4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9bb287337473424f72fa76388e51489ce091bdf46bcd78e432796ee9ea55c5b3
[INFO] running `Command { std: "docker" "start" "-a" "9bb287337473424f72fa76388e51489ce091bdf46bcd78e432796ee9ea55c5b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]    Compiling permutation_operations v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `idn`
[INFO] [stdout]   --> src/perm_ops/main.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let idn = Permutation::new(v.clone(), v.clone());
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_idn`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p2c`
[INFO] [stdout]    --> src/perm_ops/main.rs:468:9
[INFO] [stdout]     |
[INFO] [stdout] 468 |     let p2c = p2.clone();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_p2c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_row` is never used
[INFO] [stdout]    --> src/perm_ops/int_matrix.rs:272:12
[INFO] [stdout]     |
[INFO] [stdout] 271 | impl IntMatrix {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 272 |     pub fn get_row(&self, row: usize) ->Vec<i32> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_tuple_vector` is never used
[INFO] [stdout]    --> src/perm_ops/permutation.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout] 24  | impl Permutation {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn to_tuple_vector(&self) -> Vec<(i32, i32)> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "9bb287337473424f72fa76388e51489ce091bdf46bcd78e432796ee9ea55c5b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bb287337473424f72fa76388e51489ce091bdf46bcd78e432796ee9ea55c5b3", kill_on_drop: false }`
[INFO] [stdout] 9bb287337473424f72fa76388e51489ce091bdf46bcd78e432796ee9ea55c5b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04608b0c76eb3d1ec6285d9283ffb3c103c951fd712a501dd433f1efd5018817
[INFO] running `Command { std: "docker" "start" "-a" "04608b0c76eb3d1ec6285d9283ffb3c103c951fd712a501dd433f1efd5018817", kill_on_drop: false }`
[INFO] [stderr]    Compiling permutation_operations v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `idn`
[INFO] [stdout]   --> src/perm_ops/main.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let idn = Permutation::new(v.clone(), v.clone());
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_idn`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p2c`
[INFO] [stdout]    --> src/perm_ops/main.rs:468:9
[INFO] [stdout]     |
[INFO] [stdout] 468 |     let p2c = p2.clone();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_p2c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_row` is never used
[INFO] [stdout]    --> src/perm_ops/int_matrix.rs:272:12
[INFO] [stdout]     |
[INFO] [stdout] 271 | impl IntMatrix {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 272 |     pub fn get_row(&self, row: usize) ->Vec<i32> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_tuple_vector` is never used
[INFO] [stdout]    --> src/perm_ops/permutation.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout] 24  | impl Permutation {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 114 |     pub fn to_tuple_vector(&self) -> Vec<(i32, i32)> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "04608b0c76eb3d1ec6285d9283ffb3c103c951fd712a501dd433f1efd5018817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04608b0c76eb3d1ec6285d9283ffb3c103c951fd712a501dd433f1efd5018817", kill_on_drop: false }`
[INFO] [stdout] 04608b0c76eb3d1ec6285d9283ffb3c103c951fd712a501dd433f1efd5018817