[INFO] fetching crate system_media 0.1.6...
[INFO] building system_media-0.1.6 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate system_media 0.1.6 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate system_media 0.1.6
[INFO] finished tweaking crates.io crate system_media 0.1.6
[INFO] tweaked toml for crates.io crate system_media 0.1.6 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate system_media 0.1.6 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate system_media 0.1.6 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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7da4397b4ff33676c10a0e78c0bd87fe50153ba5ed510e240336579fbec4d8b1
[INFO] running `Command { std: "docker" "start" "-a" "7da4397b4ff33676c10a0e78c0bd87fe50153ba5ed510e240336579fbec4d8b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7da4397b4ff33676c10a0e78c0bd87fe50153ba5ed510e240336579fbec4d8b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7da4397b4ff33676c10a0e78c0bd87fe50153ba5ed510e240336579fbec4d8b1", kill_on_drop: false }`
[INFO] [stdout] 7da4397b4ff33676c10a0e78c0bd87fe50153ba5ed510e240336579fbec4d8b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5de847202b242a0ace957954ccb9555f35813a024ab5dd495b6f3c9c8069f18
[INFO] running `Command { std: "docker" "start" "-a" "f5de847202b242a0ace957954ccb9555f35813a024ab5dd495b6f3c9c8069f18", kill_on_drop: false }`
[INFO] [stderr]    Compiling system_media v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> build.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process::Command`
[INFO] [stdout]  --> build.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::process::Command;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/null/mod.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         unimplemented!("system-media currently only supports macOS.");
[INFO] [stdout]    |         ------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout] 55 |         println!("how do we stop a session?");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `title`
[INFO] [stdout]   --> src/null/mod.rs:13:25
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn set_title(&self, title: &str) {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_title`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `artist`
[INFO] [stdout]   --> src/null/mod.rs:17:26
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn set_artist(&self, artist: &str) {
[INFO] [stdout]    |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_artist`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `album`
[INFO] [stdout]   --> src/null/mod.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn set_album(&self, album: &str) {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_album`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `genre`
[INFO] [stdout]   --> src/null/mod.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn set_genre(&self, genre: &str) {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_genre`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/null/mod.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn set_image(&self, path: &str) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `media_type`
[INFO] [stdout]   --> src/null/mod.rs:33:30
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn set_media_type(&self, media_type: MediaType) {
[INFO] [stdout]    |                              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_media_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]   --> src/null/mod.rs:37:37
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn set_playback_duration(&self, duration: f64) {
[INFO] [stdout]    |                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]   --> src/null/mod.rs:41:36
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn set_elapsed_duration(&self, duration: f64) {
[INFO] [stdout]    |                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rate`
[INFO] [stdout]   --> src/null/mod.rs:45:33
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn set_playback_rate(&self, rate: f64) {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_rate`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "f5de847202b242a0ace957954ccb9555f35813a024ab5dd495b6f3c9c8069f18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5de847202b242a0ace957954ccb9555f35813a024ab5dd495b6f3c9c8069f18", kill_on_drop: false }`
[INFO] [stdout] f5de847202b242a0ace957954ccb9555f35813a024ab5dd495b6f3c9c8069f18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf6a7bb229e59482224c73027d4b4129e6094ca1c1043a8df310e4e2f751bd65
[INFO] running `Command { std: "docker" "start" "-a" "bf6a7bb229e59482224c73027d4b4129e6094ca1c1043a8df310e4e2f751bd65", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> build.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process::Command`
[INFO] [stdout]  --> build.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::process::Command;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/null/mod.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         unimplemented!("system-media currently only supports macOS.");
[INFO] [stdout]    |         ------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout] 55 |         println!("how do we stop a session?");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `title`
[INFO] [stdout]   --> src/null/mod.rs:13:25
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn set_title(&self, title: &str) {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_title`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `artist`
[INFO] [stdout]   --> src/null/mod.rs:17:26
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn set_artist(&self, artist: &str) {
[INFO] [stdout]    |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_artist`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `album`
[INFO] [stdout]   --> src/null/mod.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn set_album(&self, album: &str) {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_album`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `genre`
[INFO] [stdout]   --> src/null/mod.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn set_genre(&self, genre: &str) {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_genre`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/null/mod.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn set_image(&self, path: &str) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `media_type`
[INFO] [stdout]   --> src/null/mod.rs:33:30
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn set_media_type(&self, media_type: MediaType) {
[INFO] [stdout]    |                              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_media_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]   --> src/null/mod.rs:37:37
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn set_playback_duration(&self, duration: f64) {
[INFO] [stdout]    |                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]   --> src/null/mod.rs:41:36
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn set_elapsed_duration(&self, duration: f64) {
[INFO] [stdout]    |                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rate`
[INFO] [stdout]   --> src/null/mod.rs:45:33
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn set_playback_rate(&self, rate: f64) {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_rate`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling system_media v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/null/mod.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         unimplemented!("system-media currently only supports macOS.");
[INFO] [stdout]    |         ------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout] 55 |         println!("how do we stop a session?");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `title`
[INFO] [stdout]   --> src/null/mod.rs:13:25
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn set_title(&self, title: &str) {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_title`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `artist`
[INFO] [stdout]   --> src/null/mod.rs:17:26
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn set_artist(&self, artist: &str) {
[INFO] [stdout]    |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_artist`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `album`
[INFO] [stdout]   --> src/null/mod.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn set_album(&self, album: &str) {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_album`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `genre`
[INFO] [stdout]   --> src/null/mod.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn set_genre(&self, genre: &str) {
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_genre`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/null/mod.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn set_image(&self, path: &str) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `media_type`
[INFO] [stdout]   --> src/null/mod.rs:33:30
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn set_media_type(&self, media_type: MediaType) {
[INFO] [stdout]    |                              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_media_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]   --> src/null/mod.rs:37:37
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn set_playback_duration(&self, duration: f64) {
[INFO] [stdout]    |                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `duration`
[INFO] [stdout]   --> src/null/mod.rs:41:36
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn set_elapsed_duration(&self, duration: f64) {
[INFO] [stdout]    |                                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_duration`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rate`
[INFO] [stdout]   --> src/null/mod.rs:45:33
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn set_playback_rate(&self, rate: f64) {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_rate`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "bf6a7bb229e59482224c73027d4b4129e6094ca1c1043a8df310e4e2f751bd65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf6a7bb229e59482224c73027d4b4129e6094ca1c1043a8df310e4e2f751bd65", kill_on_drop: false }`
[INFO] [stdout] bf6a7bb229e59482224c73027d4b4129e6094ca1c1043a8df310e4e2f751bd65