[INFO] cloning repository https://github.com/Dylan-DPC/thread-lifetime-experiment [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Dylan-DPC/thread-lifetime-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDylan-DPC%2Fthread-lifetime-experiment", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDylan-DPC%2Fthread-lifetime-experiment'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] e8a4f3f52d9fb0400d8eb2ba5f57911ceef3ba11 [INFO] testing Dylan-DPC/thread-lifetime-experiment against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDylan-DPC%2Fthread-lifetime-experiment" "/workspace/builds/worker-42/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-42/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Dylan-DPC/thread-lifetime-experiment on toolchain 722e1797249a965b6335aebd65d777f917e498f1 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Dylan-DPC/thread-lifetime-experiment [INFO] finished tweaking git repo https://github.com/Dylan-DPC/thread-lifetime-experiment [INFO] tweaked toml for git repo https://github.com/Dylan-DPC/thread-lifetime-experiment written to /workspace/builds/worker-42/source/Cargo.toml [INFO] crate git repo https://github.com/Dylan-DPC/thread-lifetime-experiment already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b22710c1ef3150b15a897aedded57461536d4c587bd4b655ebdf223cc73f5594 [INFO] running `Command { std: "docker" "start" "-a" "b22710c1ef3150b15a897aedded57461536d4c587bd4b655ebdf223cc73f5594", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b22710c1ef3150b15a897aedded57461536d4c587bd4b655ebdf223cc73f5594", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b22710c1ef3150b15a897aedded57461536d4c587bd4b655ebdf223cc73f5594", kill_on_drop: false }` [INFO] [stdout] b22710c1ef3150b15a897aedded57461536d4c587bd4b655ebdf223cc73f5594 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5e7d39a681fa0d1c2c8698cc2e01a02b7128e77e592916e9ba1d5e4247678a3e [INFO] running `Command { std: "docker" "start" "-a" "5e7d39a681fa0d1c2c8698cc2e01a02b7128e77e592916e9ba1d5e4247678a3e", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling proc-macro2 v0.4.27 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling syn v0.15.30 [INFO] [stderr] Compiling serde v1.0.90 [INFO] [stderr] Compiling libc v0.2.51 [INFO] [stderr] Compiling ryu v0.2.7 [INFO] [stderr] Compiling lazy_static v1.3.0 [INFO] [stderr] Compiling itoa v0.4.3 [INFO] [stderr] Compiling cfg-if v0.1.7 [INFO] [stderr] Compiling smallvec v0.6.9 [INFO] [stderr] Compiling stable_deref_trait v1.1.1 [INFO] [stderr] Compiling crossbeam-utils v0.6.5 [INFO] [stderr] Compiling crossbeam-channel v0.3.8 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Compiling page_size v0.4.1 [INFO] [stderr] Compiling serde_derive v1.0.90 [INFO] [stderr] Compiling rental-impl v0.5.2 [INFO] [stderr] Compiling rental v0.5.3 [INFO] [stderr] Compiling serde_json v1.0.39 [INFO] [stderr] Compiling hashbrown v0.2.0 [INFO] [stderr] Compiling simdjson v0.1.0 (https://github.com/Licenser/simdjson-rs#4d53c41a) [INFO] [stderr] Compiling thread-lifetime-experiment v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error: using `procedural-masquerade` crate [INFO] [stdout] --> src/main.rs:10:1 [INFO] [stdout] | [INFO] [stdout] 10 | / rental! { [INFO] [stdout] 11 | | mod rentals { [INFO] [stdout] 12 | | use super::*; [INFO] [stdout] 13 | | #[rental_mut(covariant,debug)] [INFO] [stdout] ... | [INFO] [stdout] 18 | | } [INFO] [stdout] 19 | | } [INFO] [stdout] | |_^ [INFO] [stdout] | [INFO] [stdout] = note: `#[deny(proc_macro_back_compat)]` on by default [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = note: for more information, see issue #83125 [INFO] [stdout] = note: The `procedural-masquerade` crate has been unnecessary since Rust 1.30.0. Versions of this crate below 0.1.7 will eventually stop compiling. [INFO] [stdout] = note: this error originates in the macro `rental` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:62:25 [INFO] [stdout] | [INFO] [stdout] 62 | let mut content = line.unwrap(); [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: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:28:5 [INFO] [stdout] | [INFO] [stdout] 28 | / thread::scope(|t| { [INFO] [stdout] 29 | | let (s1, r1): (Sender, Receiver) = bounded(5); [INFO] [stdout] 30 | | let (s2, r2): (Sender, Receiver) = bounded(5); [INFO] [stdout] 31 | | t.spawn(move |_| { [INFO] [stdout] ... | [INFO] [stdout] 70 | | }); [INFO] [stdout] 71 | | }); [INFO] [stdout] | |_______^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:53:17 [INFO] [stdout] | [INFO] [stdout] 53 | s2.send(data); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:67:21 [INFO] [stdout] | [INFO] [stdout] 67 | s1.send(value); [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error; 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `thread-lifetime-experiment` due to 2 previous errors; 4 warnings emitted [INFO] running `Command { std: "docker" "inspect" "5e7d39a681fa0d1c2c8698cc2e01a02b7128e77e592916e9ba1d5e4247678a3e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5e7d39a681fa0d1c2c8698cc2e01a02b7128e77e592916e9ba1d5e4247678a3e", kill_on_drop: false }` [INFO] [stdout] 5e7d39a681fa0d1c2c8698cc2e01a02b7128e77e592916e9ba1d5e4247678a3e