[INFO] cloning repository https://github.com/jtubay03/rust-dsa
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jtubay03/rust-dsa" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtubay03%2Frust-dsa", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtubay03%2Frust-dsa'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f548ca6ca79b0bc8777bc1ae937e518b9162d32c
[INFO] building jtubay03/rust-dsa against master#ce36a966c79e109dabeef7a47fe68e5294c6d71e for pr-137044-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtubay03%2Frust-dsa" "/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/jtubay03/rust-dsa on toolchain ce36a966c79e109dabeef7a47fe68e5294c6d71e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jtubay03/rust-dsa
[INFO] finished tweaking git repo https://github.com/jtubay03/rust-dsa
[INFO] tweaked toml for git repo https://github.com/jtubay03/rust-dsa written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jtubay03/rust-dsa 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" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a586adda9f8e8ecdde4a6f9f9fba6b3f713dd32a609e3a1f63119fba5e7ee352
[INFO] running `Command { std: "docker" "start" "-a" "a586adda9f8e8ecdde4a6f9f9fba6b3f713dd32a609e3a1f63119fba5e7ee352", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a586adda9f8e8ecdde4a6f9f9fba6b3f713dd32a609e3a1f63119fba5e7ee352", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a586adda9f8e8ecdde4a6f9f9fba6b3f713dd32a609e3a1f63119fba5e7ee352", kill_on_drop: false }`
[INFO] [stdout] a586adda9f8e8ecdde4a6f9f9fba6b3f713dd32a609e3a1f63119fba5e7ee352
[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" "-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 519c3dac380555f15521a77c21504107dc6e4346c233c6fd626aa61bcf32d74c
[INFO] running `Command { std: "docker" "start" "-a" "519c3dac380555f15521a77c21504107dc6e4346c233c6fd626aa61bcf32d74c", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-dsa v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:24:34
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn push_front(&mut self, val: T) {
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node_val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:51:36
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn insert_after(&mut self, node_val: T, new_val: T) {
[INFO] [stdout]    |                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_node_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:51:49
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn insert_after(&mut self, node_val: T, new_val: T) {
[INFO] [stdout]    |                                                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn remove(&mut self, val: T) {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:60:28
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn contains(&self, val: T) -> bool {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:68:27
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn get(&mut self, index: usize) {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `val` is never read
[INFO] [stdout]  --> src/data_structures/linked_list.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Node<T> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 2 |     val: Option<T>,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "519c3dac380555f15521a77c21504107dc6e4346c233c6fd626aa61bcf32d74c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "519c3dac380555f15521a77c21504107dc6e4346c233c6fd626aa61bcf32d74c", kill_on_drop: false }`
[INFO] [stdout] 519c3dac380555f15521a77c21504107dc6e4346c233c6fd626aa61bcf32d74c
[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" "-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4c3ed6f797957e0e96324ecccad9574bcd45c898717a9c78fe6e798d2eb2cda
[INFO] running `Command { std: "docker" "start" "-a" "d4c3ed6f797957e0e96324ecccad9574bcd45c898717a9c78fe6e798d2eb2cda", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:24:34
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn push_front(&mut self, val: T) {
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node_val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:51:36
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn insert_after(&mut self, node_val: T, new_val: T) {
[INFO] [stdout]    |                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_node_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:51:49
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn insert_after(&mut self, node_val: T, new_val: T) {
[INFO] [stdout]    |                                                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust-dsa v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn remove(&mut self, val: T) {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:60:28
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn contains(&self, val: T) -> bool {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:68:27
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn get(&mut self, index: usize) {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `val` is never read
[INFO] [stdout]  --> src/data_structures/linked_list.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Node<T> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 2 |     val: Option<T>,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:24:34
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn push_front(&mut self, val: T) {
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node_val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:51:36
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn insert_after(&mut self, node_val: T, new_val: T) {
[INFO] [stdout]    |                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_node_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:51:49
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn insert_after(&mut self, node_val: T, new_val: T) {
[INFO] [stdout]    |                                                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn remove(&mut self, val: T) {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:60:28
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn contains(&self, val: T) -> bool {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/data_structures/linked_list.rs:68:27
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn get(&mut self, index: usize) {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `val` is never read
[INFO] [stdout]  --> src/data_structures/linked_list.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Node<T> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 2 |     val: Option<T>,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "d4c3ed6f797957e0e96324ecccad9574bcd45c898717a9c78fe6e798d2eb2cda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4c3ed6f797957e0e96324ecccad9574bcd45c898717a9c78fe6e798d2eb2cda", kill_on_drop: false }`
[INFO] [stdout] d4c3ed6f797957e0e96324ecccad9574bcd45c898717a9c78fe6e798d2eb2cda