[INFO] cloning repository https://github.com/bch29/traitcast [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bch29/traitcast" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbch29%2Ftraitcast", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbch29%2Ftraitcast'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 4f8cb2293d1e7b5e5f2b87141a68c2d7a9a7ceeb [INFO] testing bch29/traitcast against 1.60.0 for beta-1.61-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbch29%2Ftraitcast" "/workspace/builds/worker-12/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/bch29/traitcast on toolchain 1.60.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/bch29/traitcast [INFO] finished tweaking git repo https://github.com/bch29/traitcast [INFO] tweaked toml for git repo https://github.com/bch29/traitcast written to /workspace/builds/worker-12/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded ghost v0.1.2 [INFO] [stderr] Downloaded inventory-impl v0.1.11 [INFO] [stderr] Downloaded inventory v0.1.11 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 395c7fa86ab8fe56dc02c745049dca779e8b84368479c23f0f6aa8dbacea0c5e [INFO] running `Command { std: "docker" "start" "-a" "395c7fa86ab8fe56dc02c745049dca779e8b84368479c23f0f6aa8dbacea0c5e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "395c7fa86ab8fe56dc02c745049dca779e8b84368479c23f0f6aa8dbacea0c5e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "395c7fa86ab8fe56dc02c745049dca779e8b84368479c23f0f6aa8dbacea0c5e", kill_on_drop: false }` [INFO] [stdout] 395c7fa86ab8fe56dc02c745049dca779e8b84368479c23f0f6aa8dbacea0c5e [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7e3e9d61061b87c322f530ee5e0d051412e6cc799124ed42f5d979bc62d4b9da [INFO] running `Command { std: "docker" "start" "-a" "7e3e9d61061b87c322f530ee5e0d051412e6cc799124ed42f5d979bc62d4b9da", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling proc-macro2 v1.0.37 [INFO] [stderr] Compiling syn v1.0.91 [INFO] [stderr] Compiling inventory v0.1.11 [INFO] [stderr] Compiling anymap v0.12.1 [INFO] [stderr] Compiling quote v1.0.18 [INFO] [stderr] Compiling ghost v0.1.2 [INFO] [stderr] Compiling ctor v0.1.22 [INFO] [stderr] Compiling inventory-impl v0.1.11 [INFO] [stderr] Compiling traitcast_core v0.2.0 (/opt/rustwide/workdir/core) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> core/src/inventory.rs:20:21 [INFO] [stdout] | [INFO] [stdout] 20 | pub insert: Box, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 20 - pub insert: Box, [INFO] [stdout] 20 + pub insert: Box, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> core/src/lib.rs:140:61 [INFO] [stdout] | [INFO] [stdout] 140 | pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 140 - pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] 140 + pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> core/src/lib.rs:140:26 [INFO] [stdout] | [INFO] [stdout] 140 | pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 140 - pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] 140 + pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling traitcast v0.5.0 (/opt/rustwide/workdir/traitcast) [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 8.49s [INFO] running `Command { std: "docker" "inspect" "7e3e9d61061b87c322f530ee5e0d051412e6cc799124ed42f5d979bc62d4b9da", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7e3e9d61061b87c322f530ee5e0d051412e6cc799124ed42f5d979bc62d4b9da", kill_on_drop: false }` [INFO] [stdout] 7e3e9d61061b87c322f530ee5e0d051412e6cc799124ed42f5d979bc62d4b9da [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 4dbec8d8d723c359b8bd5b9f6b2b64bac75ad9716ce53233720bb782b23dfc58 [INFO] running `Command { std: "docker" "start" "-a" "4dbec8d8d723c359b8bd5b9f6b2b64bac75ad9716ce53233720bb782b23dfc58", kill_on_drop: false }` [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> core/src/inventory.rs:20:21 [INFO] [stdout] | [INFO] [stdout] 20 | pub insert: Box, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 20 - pub insert: Box, [INFO] [stdout] 20 + pub insert: Box, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> core/src/lib.rs:140:61 [INFO] [stdout] | [INFO] [stdout] 140 | pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 140 - pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] 140 + pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling traitcast_core v0.2.0 (/opt/rustwide/workdir/core) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> core/src/lib.rs:140:26 [INFO] [stdout] | [INFO] [stdout] 140 | pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 140 - pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] 140 + pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling traitcast v0.5.0 (/opt/rustwide/workdir/traitcast) [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> core/src/inventory.rs:20:21 [INFO] [stdout] | [INFO] [stdout] 20 | pub insert: Box, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 20 - pub insert: Box, [INFO] [stdout] 20 + pub insert: Box, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> core/src/lib.rs:140:61 [INFO] [stdout] | [INFO] [stdout] 140 | pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 140 - pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] 140 + pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> core/src/lib.rs:140:26 [INFO] [stdout] | [INFO] [stdout] 140 | pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 140 - pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] 140 + pub cast_box: fn(Box) -> Result, Box>, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> traitcast/src/tests.rs:68:20 [INFO] [stdout] | [INFO] [stdout] 68 | let mut x: Box = Box::new(A { x: 0 }); [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 68 - let mut x: Box = Box::new(A { x: 0 }); [INFO] [stdout] 68 + let mut x: Box = Box::new(A { x: 0 }); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> traitcast/src/tests.rs:69:20 [INFO] [stdout] | [INFO] [stdout] 69 | let mut y: Box = Box::new(B { y: 1 }); [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 69 - let mut y: Box = Box::new(B { y: 1 }); [INFO] [stdout] 69 + let mut y: Box = Box::new(B { y: 1 }); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.69s [INFO] running `Command { std: "docker" "inspect" "4dbec8d8d723c359b8bd5b9f6b2b64bac75ad9716ce53233720bb782b23dfc58", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4dbec8d8d723c359b8bd5b9f6b2b64bac75ad9716ce53233720bb782b23dfc58", kill_on_drop: false }` [INFO] [stdout] 4dbec8d8d723c359b8bd5b9f6b2b64bac75ad9716ce53233720bb782b23dfc58 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 6912ab5396e600840ce77052a51af00c4d8b0a94316d33b017271aef0dd34723 [INFO] running `Command { std: "docker" "start" "-a" "6912ab5396e600840ce77052a51af00c4d8b0a94316d33b017271aef0dd34723", kill_on_drop: false }` [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> core/src/inventory.rs:20:21 [INFO] [stderr] | [INFO] [stderr] 20 | pub insert: Box, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stderr] = note: for more information, see [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 20 - pub insert: Box, [INFO] [stderr] 20 + pub insert: Box, [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> core/src/lib.rs:140:61 [INFO] [stderr] | [INFO] [stderr] 140 | pub cast_box: fn(Box) -> Result, Box>, [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stderr] = note: for more information, see [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 140 - pub cast_box: fn(Box) -> Result, Box>, [INFO] [stderr] 140 + pub cast_box: fn(Box) -> Result, Box>, [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> core/src/lib.rs:140:26 [INFO] [stderr] | [INFO] [stderr] 140 | pub cast_box: fn(Box) -> Result, Box>, [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stderr] = note: for more information, see [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 140 - pub cast_box: fn(Box) -> Result, Box>, [INFO] [stderr] 140 + pub cast_box: fn(Box) -> Result, Box>, [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: `traitcast_core` (lib) generated 3 warnings [INFO] [stderr] warning: `traitcast_core` (lib test) generated 3 warnings (3 duplicates) [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> traitcast/src/tests.rs:68:20 [INFO] [stderr] | [INFO] [stderr] 68 | let mut x: Box = Box::new(A { x: 0 }); [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stderr] = note: for more information, see [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 68 - let mut x: Box = Box::new(A { x: 0 }); [INFO] [stderr] 68 + let mut x: Box = Box::new(A { x: 0 }); [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> traitcast/src/tests.rs:69:20 [INFO] [stderr] | [INFO] [stderr] 69 | let mut y: Box = Box::new(B { y: 1 }); [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stderr] = note: for more information, see [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 69 - let mut y: Box = Box::new(B { y: 1 }); [INFO] [stderr] 69 + let mut y: Box = Box::new(B { y: 1 }); [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: `traitcast` (lib test) generated 2 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/traitcast-61ee5eeb27f2d4f9) [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test tests::test_traitcast ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/traitcast_core-b8b26cd9631fef69) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Doc-tests traitcast [INFO] [stdout] [INFO] [stdout] running 3 tests [INFO] [stdout] test src/lib.rs - (line 19) - compile fail ... ok [INFO] [stdout] test src/lib.rs - (line 7) ... ok [INFO] [stdout] test src/lib.rs - (line 46) ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.52s [INFO] [stdout] [INFO] [stderr] Doc-tests traitcast_core [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test src/lib.rs - impl_entry (line 218) ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.28s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "6912ab5396e600840ce77052a51af00c4d8b0a94316d33b017271aef0dd34723", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6912ab5396e600840ce77052a51af00c4d8b0a94316d33b017271aef0dd34723", kill_on_drop: false }` [INFO] [stdout] 6912ab5396e600840ce77052a51af00c4d8b0a94316d33b017271aef0dd34723