[INFO] crate burner 0.2.3 is already in cache
[INFO] checking burner-0.2.3 against try#6024cfef3a82f9a7688f07054f1650081bad3af5 for pr-74130
[INFO] extracting crate burner 0.2.3 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate burner 0.2.3 on toolchain 6024cfef3a82f9a7688f07054f1650081bad3af5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate burner 0.2.3
[INFO] finished tweaking crates.io crate burner 0.2.3
[INFO] tweaked toml for crates.io crate burner 0.2.3 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "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] 15a4b43926254e7f824c7d6fb2c9989337bf1de4c5b300869febf203c48b8904
[INFO] running `Command { std: "docker" "start" "-a" "15a4b43926254e7f824c7d6fb2c9989337bf1de4c5b300869febf203c48b8904", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15a4b43926254e7f824c7d6fb2c9989337bf1de4c5b300869febf203c48b8904", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15a4b43926254e7f824c7d6fb2c9989337bf1de4c5b300869febf203c48b8904", kill_on_drop: false }`
[INFO] [stdout] 15a4b43926254e7f824c7d6fb2c9989337bf1de4c5b300869febf203c48b8904
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+6024cfef3a82f9a7688f07054f1650081bad3af5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6dab73bb16af78714a6e994995034c772f4cd9b36552c9fb2c038c2a63d2f9c2
[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" "6dab73bb16af78714a6e994995034c772f4cd9b36552c9fb2c038c2a63d2f9c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling serde_json v1.0.56
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking burner v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `serde_json::Value`
[INFO] [stdout]  --> src/route.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde_json::Value;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Value`, `json`
[INFO] [stdout]  --> src/server.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde_json::{Value, json};
[INFO] [stdout]   |                  ^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json::Value`
[INFO] [stdout]  --> src/router.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde_json::Value;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json::Value`
[INFO] [stdout]  --> src/route.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde_json::Value;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Value`, `json`
[INFO] [stdout]  --> src/server.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde_json::{Value, json};
[INFO] [stdout]   |                  ^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json::Value`
[INFO] [stdout]  --> src/router.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use serde_json::Value;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status_message`
[INFO] [stdout]   --> src/response.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |         let status_message = self.get_status_message();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_status_message`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/server.rs:66:21
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 Err(err) => {
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status_message`
[INFO] [stdout]   --> src/response.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |         let status_message = self.get_status_message();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_status_message`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/server.rs:66:21
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 Err(err) => {
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `handler`
[INFO] [stdout]   --> src/route.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     handler: Middleware
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle`
[INFO] [stdout]   --> src/route.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn handle(&self, req: &Request, res: &Response){
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]   --> src/thread_pool.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     id: usize,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `handler`
[INFO] [stdout]   --> src/route.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     handler: Middleware
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle`
[INFO] [stdout]   --> src/route.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn handle(&self, req: &Request, res: &Response){
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]   --> src/thread_pool.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     id: usize,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `req`
[INFO] [stdout]   --> tests/main.rs:42:25
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let get_post = |req: &Request, res: &mut Response| {
[INFO] [stdout]    |                         ^^^ help: if this is intentional, prefix it with an underscore: `_req`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> tests/main.rs:42:40
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let get_post = |req: &Request, res: &mut Response| {
[INFO] [stdout]    |                                        ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `req`
[INFO] [stdout]   --> tests/main.rs:46:28
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let create_post = |req: &Request, res: &mut Response| {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_req`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> tests/main.rs:46:43
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let create_post = |req: &Request, res: &mut Response| {
[INFO] [stdout]    |                                           ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dummy_test`
[INFO] [stdout]   --> tests/main.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn dummy_test(){
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.05s
[INFO] running `Command { std: "docker" "inspect" "6dab73bb16af78714a6e994995034c772f4cd9b36552c9fb2c038c2a63d2f9c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dab73bb16af78714a6e994995034c772f4cd9b36552c9fb2c038c2a63d2f9c2", kill_on_drop: false }`
[INFO] [stdout] 6dab73bb16af78714a6e994995034c772f4cd9b36552c9fb2c038c2a63d2f9c2