[INFO] fetching crate reusable-box-future 0.2.0... [INFO] checking reusable-box-future-0.2.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback [INFO] extracting crate reusable-box-future 0.2.0 into /workspace/builds/worker-3-tc1/source [INFO] validating manifest of crates.io crate reusable-box-future 0.2.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate reusable-box-future 0.2.0 [INFO] finished tweaking crates.io crate reusable-box-future 0.2.0 [INFO] tweaked toml for crates.io crate reusable-box-future 0.2.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 10 packages [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 3be4bc129eda73535db428b9a4fa143de274a145ea60ba6932e1e61ee0388d6e [INFO] running `Command { std: "docker" "start" "-a" "3be4bc129eda73535db428b9a4fa143de274a145ea60ba6932e1e61ee0388d6e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "3be4bc129eda73535db428b9a4fa143de274a145ea60ba6932e1e61ee0388d6e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3be4bc129eda73535db428b9a4fa143de274a145ea60ba6932e1e61ee0388d6e", kill_on_drop: false }` [INFO] [stdout] 3be4bc129eda73535db428b9a4fa143de274a145ea60ba6932e1e61ee0388d6e [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7b7b2ad3b5bc62a15ca4de7aa581029d1b89e9e0330328074ecc6a0a0ff89082 [INFO] running `Command { std: "docker" "start" "-a" "7b7b2ad3b5bc62a15ca4de7aa581029d1b89e9e0330328074ecc6a0a0ff89082", kill_on_drop: false }` [INFO] [stderr] Checking futures-core v0.3.30 [INFO] [stderr] Checking static_assertions v1.1.0 [INFO] [stderr] Checking reusable-box-future v0.2.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking futures-util v0.3.30 [INFO] [stderr] Checking futures-executor v0.3.30 [INFO] [stdout] warning: the item `Box` is imported redundantly [INFO] [stdout] --> src/box_future.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use alloc::boxed::Box; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Box` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Box` is imported redundantly [INFO] [stdout] --> src/local_box_future.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use alloc::boxed::Box; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Box` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/box_future.rs:292:28 [INFO] [stdout] | [INFO] [stdout] 292 | panic!(1u32); [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stdout] help: add a "{}" format string to `Display` the message [INFO] [stdout] | [INFO] [stdout] 292 | panic!("{}", 1u32); [INFO] [stdout] | +++++ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 292 | std::panic::panic_any(1u32); [INFO] [stdout] | ~~~~~~~~~~~~~~~~~~~~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/box_future.rs:326:37 [INFO] [stdout] | [INFO] [stdout] 326 | Ok(_) => panic!(2u32), [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: add a "{}" format string to `Display` the message [INFO] [stdout] | [INFO] [stdout] 326 | Ok(_) => panic!("{}", 2u32), [INFO] [stdout] | +++++ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 326 | Ok(_) => std::panic::panic_any(2u32), [INFO] [stdout] | ~~~~~~~~~~~~~~~~~~~~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/box_future.rs:327:38 [INFO] [stdout] | [INFO] [stdout] 327 | Err(_) => panic!(3u32), [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: add a "{}" format string to `Display` the message [INFO] [stdout] | [INFO] [stdout] 327 | Err(_) => panic!("{}", 3u32), [INFO] [stdout] | +++++ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 327 | Err(_) => std::panic::panic_any(3u32), [INFO] [stdout] | ~~~~~~~~~~~~~~~~~~~~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.96s [INFO] running `Command { std: "docker" "inspect" "7b7b2ad3b5bc62a15ca4de7aa581029d1b89e9e0330328074ecc6a0a0ff89082", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7b7b2ad3b5bc62a15ca4de7aa581029d1b89e9e0330328074ecc6a0a0ff89082", kill_on_drop: false }` [INFO] [stdout] 7b7b2ad3b5bc62a15ca4de7aa581029d1b89e9e0330328074ecc6a0a0ff89082 [INFO] checking reusable-box-future-0.2.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback [INFO] extracting crate reusable-box-future 0.2.0 into /workspace/builds/worker-3-tc2/source [INFO] validating manifest of crates.io crate reusable-box-future 0.2.0 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate reusable-box-future 0.2.0 [INFO] finished tweaking crates.io crate reusable-box-future 0.2.0 [INFO] tweaked toml for crates.io crate reusable-box-future 0.2.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2a838fe6e997f6b385aa5807ef18a8cc245d78435b30aea542ef7092a16185af [INFO] running `Command { std: "docker" "start" "-a" "2a838fe6e997f6b385aa5807ef18a8cc245d78435b30aea542ef7092a16185af", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2a838fe6e997f6b385aa5807ef18a8cc245d78435b30aea542ef7092a16185af", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2a838fe6e997f6b385aa5807ef18a8cc245d78435b30aea542ef7092a16185af", kill_on_drop: false }` [INFO] [stdout] 2a838fe6e997f6b385aa5807ef18a8cc245d78435b30aea542ef7092a16185af [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3c5ce6a8ed1794e3257184319e5ac3adca3edec84213174a10ee779cf096bf68 [INFO] running `Command { std: "docker" "start" "-a" "3c5ce6a8ed1794e3257184319e5ac3adca3edec84213174a10ee779cf096bf68", kill_on_drop: false }` [INFO] [stderr] Compiling slab v0.4.9 [INFO] [stderr] Checking futures-core v0.3.30 [INFO] [stderr] Checking static_assertions v1.1.0 [INFO] [stderr] Checking reusable-box-future v0.2.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking futures-util v0.3.30 [INFO] [stderr] Checking futures-executor v0.3.30 [INFO] [stdout] warning: the item `Box` is imported redundantly [INFO] [stdout] --> src/box_future.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use alloc::boxed::Box; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Box` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Box` is imported redundantly [INFO] [stdout] --> src/local_box_future.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use alloc::boxed::Box; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Box` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0282]: type annotations needed for `Result<_, Box>` [INFO] [stdout] --> src/box_future.rs:318:13 [INFO] [stdout] | [INFO] [stdout] 318 | let result = std::panic::catch_unwind({ [INFO] [stdout] | _____________^^^^^^___- [INFO] [stdout] 319 | | let drop1 = Arc::clone(&drop1); [INFO] [stdout] 320 | | let drop2 = Arc::clone(&drop2); [INFO] [stdout] ... | [INFO] [stdout] 329 | | } [INFO] [stdout] 330 | | }); [INFO] [stdout] | |__________- type must be known at this point [INFO] [stdout] | [INFO] [stdout] help: consider giving `result` an explicit type, where the type for type parameter `R` is specified [INFO] [stdout] | [INFO] [stdout] 318 | let result: Result<_, Box> = std::panic::catch_unwind({ [INFO] [stdout] | ++++++++++++++++++++++++++++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0282`. [INFO] [stdout] [INFO] [stderr] error: could not compile `reusable-box-future` (lib test) due to 2 previous errors; 2 warnings emitted [INFO] running `Command { std: "docker" "inspect" "3c5ce6a8ed1794e3257184319e5ac3adca3edec84213174a10ee779cf096bf68", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3c5ce6a8ed1794e3257184319e5ac3adca3edec84213174a10ee779cf096bf68", kill_on_drop: false }` [INFO] [stdout] 3c5ce6a8ed1794e3257184319e5ac3adca3edec84213174a10ee779cf096bf68