[INFO] fetching crate take_mut 0.2.2... [INFO] checking take_mut-0.2.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never [INFO] extracting crate take_mut 0.2.2 into /workspace/builds/worker-1-tc1/source [INFO] validating manifest of crates.io crate take_mut 0.2.2 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate take_mut 0.2.2 [INFO] finished tweaking crates.io crate take_mut 0.2.2 [INFO] tweaked toml for crates.io crate take_mut 0.2.2 written to /workspace/builds/worker-1-tc1/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "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-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b1ee3951fb8ecd6dc15724c665a6d1d0f2235628c1fe7f61f1d19d5135dacc13 [INFO] running `Command { std: "docker" "start" "-a" "b1ee3951fb8ecd6dc15724c665a6d1d0f2235628c1fe7f61f1d19d5135dacc13", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b1ee3951fb8ecd6dc15724c665a6d1d0f2235628c1fe7f61f1d19d5135dacc13", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b1ee3951fb8ecd6dc15724c665a6d1d0f2235628c1fe7f61f1d19d5135dacc13", kill_on_drop: false }` [INFO] [stdout] b1ee3951fb8ecd6dc15724c665a6d1d0f2235628c1fe7f61f1d19d5135dacc13 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 551aa1be8da2a5bb06305088412ac98b796cb31e7e654483c358a70da30b9579 [INFO] running `Command { std: "docker" "start" "-a" "551aa1be8da2a5bb06305088412ac98b796cb31e7e654483c358a70da30b9579", kill_on_drop: false }` [INFO] [stderr] Checking take_mut v0.2.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `std` is imported redundantly [INFO] [stdout] --> src/scoped.rs:33:5 [INFO] [stdout] | [INFO] [stdout] 33 | use std; [INFO] [stdout] | ^^^ the item `std` is already imported by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `std` is imported redundantly [INFO] [stdout] --> src/scoped.rs:33:5 [INFO] [stdout] | [INFO] [stdout] 33 | use std; [INFO] [stdout] | ^^^ the item `std` is already imported by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> src/lib.rs:46:20 [INFO] [stdout] | [INFO] [stdout] 46 | enum Foo {A, B}; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(redundant_semicolons)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> src/lib.rs:105:20 [INFO] [stdout] | [INFO] [stdout] 105 | enum Foo {A, B}; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> src/lib.rs:125:23 [INFO] [stdout] | [INFO] [stdout] 125 | enum Foo {A, B, C}; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/lib.rs:141:13 [INFO] [stdout] | [INFO] [stdout] 140 | panic!("panic"); [INFO] [stdout] | --------------- any code following this expression is unreachable [INFO] [stdout] 141 | Foo::B [INFO] [stdout] | ^^^^^^ unreachable expression [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/scoped.rs:153:14 [INFO] [stdout] | [INFO] [stdout] 153 | let (a, a_hole) = scope.take(&mut bar.a); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/scoped.rs:154:14 [INFO] [stdout] | [INFO] [stdout] 154 | let (b, b_hole) = scope.take(&mut bar.b); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/scoped.rs:170:18 [INFO] [stdout] | [INFO] [stdout] 170 | let (t, hole) = scope.take_or_recover(&mut foo, || Foo); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hole` [INFO] [stdout] --> src/scoped.rs:170:21 [INFO] [stdout] | [INFO] [stdout] 170 | let (t, hole) = scope.take_or_recover(&mut foo, || Foo); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_hole` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s [INFO] running `Command { std: "docker" "inspect" "551aa1be8da2a5bb06305088412ac98b796cb31e7e654483c358a70da30b9579", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "551aa1be8da2a5bb06305088412ac98b796cb31e7e654483c358a70da30b9579", kill_on_drop: false }` [INFO] [stdout] 551aa1be8da2a5bb06305088412ac98b796cb31e7e654483c358a70da30b9579 [INFO] checking take_mut-0.2.2 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never [INFO] extracting crate take_mut 0.2.2 into /workspace/builds/worker-1-tc2/source [INFO] validating manifest of crates.io crate take_mut 0.2.2 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate take_mut 0.2.2 [INFO] finished tweaking crates.io crate take_mut 0.2.2 [INFO] tweaked toml for crates.io crate take_mut 0.2.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f14096f5762c92111d81db0392808bff05ba7e5978be5988033a4cce8ddb41ff [INFO] running `Command { std: "docker" "start" "-a" "f14096f5762c92111d81db0392808bff05ba7e5978be5988033a4cce8ddb41ff", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f14096f5762c92111d81db0392808bff05ba7e5978be5988033a4cce8ddb41ff", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f14096f5762c92111d81db0392808bff05ba7e5978be5988033a4cce8ddb41ff", kill_on_drop: false }` [INFO] [stdout] f14096f5762c92111d81db0392808bff05ba7e5978be5988033a4cce8ddb41ff [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] a895eb615d17546fb82e448fb09c9bcf947dfccb1569741d85042d3c8d11146a [INFO] running `Command { std: "docker" "start" "-a" "a895eb615d17546fb82e448fb09c9bcf947dfccb1569741d85042d3c8d11146a", kill_on_drop: false }` [INFO] [stderr] Checking take_mut v0.2.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `std` is imported redundantly [INFO] [stdout] --> src/scoped.rs:33:5 [INFO] [stdout] | [INFO] [stdout] 33 | use std; [INFO] [stdout] | ^^^ the item `std` is already imported by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> src/lib.rs:46:20 [INFO] [stdout] | [INFO] [stdout] 46 | enum Foo {A, B}; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(redundant_semicolons)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> src/lib.rs:105:20 [INFO] [stdout] | [INFO] [stdout] 105 | enum Foo {A, B}; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> src/lib.rs:125:23 [INFO] [stdout] | [INFO] [stdout] 125 | enum Foo {A, B, C}; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `std` is imported redundantly [INFO] [stdout] --> src/scoped.rs:33:5 [INFO] [stdout] | [INFO] [stdout] 33 | use std; [INFO] [stdout] | ^^^ the item `std` is already imported by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/lib.rs:141:13 [INFO] [stdout] | [INFO] [stdout] 140 | panic!("panic"); [INFO] [stdout] | --------------- any code following this expression is unreachable [INFO] [stdout] 141 | Foo::B [INFO] [stdout] | ^^^^^^ unreachable expression [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/scoped.rs:153:14 [INFO] [stdout] | [INFO] [stdout] 153 | let (a, a_hole) = scope.take(&mut bar.a); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/scoped.rs:154:14 [INFO] [stdout] | [INFO] [stdout] 154 | let (b, b_hole) = scope.take(&mut bar.b); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/scoped.rs:170:18 [INFO] [stdout] | [INFO] [stdout] 170 | let (t, hole) = scope.take_or_recover(&mut foo, || Foo); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hole` [INFO] [stdout] --> src/scoped.rs:170:21 [INFO] [stdout] | [INFO] [stdout] 170 | let (t, hole) = scope.take_or_recover(&mut foo, || Foo); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_hole` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s [INFO] running `Command { std: "docker" "inspect" "a895eb615d17546fb82e448fb09c9bcf947dfccb1569741d85042d3c8d11146a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a895eb615d17546fb82e448fb09c9bcf947dfccb1569741d85042d3c8d11146a", kill_on_drop: false }` [INFO] [stdout] a895eb615d17546fb82e448fb09c9bcf947dfccb1569741d85042d3c8d11146a