[INFO] fetching crate tao-of-rust 1.0.2... [INFO] checking tao-of-rust-1.0.2 against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387 [INFO] extracting crate tao-of-rust 1.0.2 into /workspace/builds/worker-12/source [INFO] validating manifest of crates.io crate tao-of-rust 1.0.2 on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate tao-of-rust 1.0.2 [INFO] finished tweaking crates.io crate tao-of-rust 1.0.2 [INFO] tweaked toml for crates.io crate tao-of-rust 1.0.2 written to /workspace/builds/worker-12/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded failures_crate v0.1.0 [INFO] [stderr] Downloaded csv_challenge v0.1.0 [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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 33f0317a580916cb9faabeab219d1b8698a3f4480e3121323cb5c42a4e196f9f [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "33f0317a580916cb9faabeab219d1b8698a3f4480e3121323cb5c42a4e196f9f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "33f0317a580916cb9faabeab219d1b8698a3f4480e3121323cb5c42a4e196f9f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "33f0317a580916cb9faabeab219d1b8698a3f4480e3121323cb5c42a4e196f9f", kill_on_drop: false }` [INFO] [stdout] 33f0317a580916cb9faabeab219d1b8698a3f4480e3121323cb5c42a4e196f9f [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=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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 756dca4d95697b57340b7155f4ae9944f662af70e06002bf63a7025d6f6e1210 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "756dca4d95697b57340b7155f4ae9944f662af70e06002bf63a7025d6f6e1210", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.95 [INFO] [stderr] Compiling proc-macro2 v1.0.27 [INFO] [stderr] Compiling unicode-xid v0.2.2 [INFO] [stderr] Compiling syn v1.0.72 [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Compiling cc v1.0.68 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Checking gimli v0.24.0 [INFO] [stderr] Checking adler v1.0.2 [INFO] [stderr] Compiling failure_derive v0.1.8 [INFO] [stderr] Checking object v0.24.0 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Checking rustc-demangle v0.1.19 [INFO] [stderr] Compiling miniz_oxide v0.4.4 [INFO] [stderr] Compiling backtrace v0.3.59 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Compiling quote v1.0.9 [INFO] [stderr] Checking clap v2.33.3 [INFO] [stderr] Checking addr2line v0.15.1 [INFO] [stderr] Compiling structopt-derive v0.2.18 [INFO] [stderr] Compiling synstructure v0.12.4 [INFO] [stderr] Checking structopt v0.2.18 [INFO] [stderr] Checking csv_challenge v0.1.0 [INFO] [stderr] Checking failure v0.1.8 [INFO] [stderr] Checking failures_crate v0.1.0 [INFO] [stderr] Checking tao-of-rust v1.0.2 (/opt/rustwide/workdir) [INFO] [stdout] error[E0557]: feature has been removed [INFO] [stdout] --> src/lib.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(const_fn)] [INFO] [stdout] | ^^^^^^^^ feature has been removed [INFO] [stdout] | [INFO] [stdout] = note: split into finer-grained feature gates [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0557]: feature has been removed [INFO] [stdout] --> src/lib.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(const_fn)] [INFO] [stdout] | ^^^^^^^^ feature has been removed [INFO] [stdout] | [INFO] [stdout] = note: split into finer-grained feature gates [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:3:12 [INFO] [stdout] | [INFO] [stdout] 3 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch01/mod.rs:106:20 [INFO] [stdout] | [INFO] [stdout] 106 | pub fn fly_dyn(s: &Fly) -> bool { [INFO] [stdout] | ^^^ help: use `dyn`: `dyn Fly` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` 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 the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch02/function.rs:188:27 [INFO] [stdout] | [INFO] [stdout] 188 | pub fn two_times() -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: denote infinite loops with `loop { ... }` [INFO] [stdout] --> src/ch02/control_flow.rs:152:5 [INFO] [stdout] | [INFO] [stdout] 152 | while true { [INFO] [stdout] | ^^^^^^^^^^ help: use `loop` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(while_true)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/ch02/control_flow.rs:199:10 [INFO] [stdout] | [INFO] [stdout] 199 | 1...3 => println!("All"), [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(ellipsis_inclusive_range_patterns)]` 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 the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression [INFO] [stdout] --> src/ch02/primitives.rs:170:14 [INFO] [stdout] | [INFO] [stdout] 170 | for i in (1..5) { [INFO] [stdout] | ^^^^^^ help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression [INFO] [stdout] --> src/ch02/primitives.rs:173:14 [INFO] [stdout] | [INFO] [stdout] 173 | for i in (1..=5) { [INFO] [stdout] | ^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `if` condition [INFO] [stdout] --> src/ch02/structs.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | let gender = if (self.gender == 1) {"boy"} else {"girl"}; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch03/abstract_type.rs:36:29 [INFO] [stdout] | [INFO] [stdout] 36 | fn dynamic_dispatch(t: &Bar) { [INFO] [stdout] | ^^^ help: use `dyn`: `dyn Bar` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Drop` is imported redundantly [INFO] [stdout] --> src/ch04/raii.rs:92:9 [INFO] [stdout] | [INFO] [stdout] 92 | use std::ops::Drop; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch06/closures.rs:48:31 [INFO] [stdout] | [INFO] [stdout] 48 | fn counter(i: i32) -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch06/closures.rs:512:38 [INFO] [stdout] | [INFO] [stdout] 512 | fn boxed_closure(c: &mut Vec>){ [INFO] [stdout] | ^^^^ help: use `dyn`: `dyn Fn()` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch06/closures.rs:519:28 [INFO] [stdout] | [INFO] [stdout] 519 | let mut c: Vec> = vec![]; [INFO] [stdout] | ^^^^ help: use `dyn`: `dyn Fn()` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch06/closures.rs:638:19 [INFO] [stdout] | [INFO] [stdout] 638 | fn bar(b: Box DoSomething<&'f usize>>) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'f> DoSomething<&'f usize>` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:3:12 [INFO] [stdout] | [INFO] [stdout] 3 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch01/mod.rs:106:20 [INFO] [stdout] | [INFO] [stdout] 106 | pub fn fly_dyn(s: &Fly) -> bool { [INFO] [stdout] | ^^^ help: use `dyn`: `dyn Fly` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` 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 the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch02/function.rs:188:27 [INFO] [stdout] | [INFO] [stdout] 188 | pub fn two_times() -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: denote infinite loops with `loop { ... }` [INFO] [stdout] --> src/ch02/control_flow.rs:152:5 [INFO] [stdout] | [INFO] [stdout] 152 | while true { [INFO] [stdout] | ^^^^^^^^^^ help: use `loop` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(while_true)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/ch02/control_flow.rs:199:10 [INFO] [stdout] | [INFO] [stdout] 199 | 1...3 => println!("All"), [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(ellipsis_inclusive_range_patterns)]` 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 the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression [INFO] [stdout] --> src/ch02/primitives.rs:170:14 [INFO] [stdout] | [INFO] [stdout] 170 | for i in (1..5) { [INFO] [stdout] | ^^^^^^ help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression [INFO] [stdout] --> src/ch02/primitives.rs:173:14 [INFO] [stdout] | [INFO] [stdout] 173 | for i in (1..=5) { [INFO] [stdout] | ^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `if` condition [INFO] [stdout] --> src/ch02/structs.rs:58:23 [INFO] [stdout] | [INFO] [stdout] 58 | let gender = if (self.gender == 1) {"boy"} else {"girl"}; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch03/abstract_type.rs:36:29 [INFO] [stdout] | [INFO] [stdout] 36 | fn dynamic_dispatch(t: &Bar) { [INFO] [stdout] | ^^^ help: use `dyn`: `dyn Bar` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Drop` is imported redundantly [INFO] [stdout] --> src/ch04/raii.rs:92:9 [INFO] [stdout] | [INFO] [stdout] 92 | use std::ops::Drop; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch06/closures.rs:48:31 [INFO] [stdout] | [INFO] [stdout] 48 | fn counter(i: i32) -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch06/closures.rs:512:38 [INFO] [stdout] | [INFO] [stdout] 512 | fn boxed_closure(c: &mut Vec>){ [INFO] [stdout] | ^^^^ help: use `dyn`: `dyn Fn()` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch06/closures.rs:519:28 [INFO] [stdout] | [INFO] [stdout] 519 | let mut c: Vec> = vec![]; [INFO] [stdout] | ^^^^ help: use `dyn`: `dyn Fn()` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/ch06/closures.rs:638:19 [INFO] [stdout] | [INFO] [stdout] 638 | fn bar(b: Box DoSomething<&'f usize>>) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'f> DoSomething<&'f usize>` [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0520]: `swim` specializes an item from a parent `impl`, but that item is not marked `default` [INFO] [stdout] --> src/ch03/trait_limit.rs:157:9 [INFO] [stdout] | [INFO] [stdout] 154 | impl Swimmer for Diver {} [INFO] [stdout] | ------------------------------- parent `impl` is here [INFO] [stdout] ... [INFO] [stdout] 157 | / fn swim(&self) { [INFO] [stdout] 158 | | println!("drowning, help!") [INFO] [stdout] 159 | | } [INFO] [stdout] | |_________^ cannot specialize default item `swim` [INFO] [stdout] | [INFO] [stdout] = note: to specialize, `swim` in the parent `impl` must be marked `default` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0520]: `swim` specializes an item from a parent `impl`, but that item is not marked `default` [INFO] [stdout] --> src/ch03/trait_limit.rs:157:9 [INFO] [stdout] | [INFO] [stdout] 154 | impl Swimmer for Diver {} [INFO] [stdout] | ------------------------------- parent `impl` is here [INFO] [stdout] ... [INFO] [stdout] 157 | / fn swim(&self) { [INFO] [stdout] 158 | | println!("drowning, help!") [INFO] [stdout] 159 | | } [INFO] [stdout] | |_________^ cannot specialize default item `swim` [INFO] [stdout] | [INFO] [stdout] = note: to specialize, `swim` in the parent `impl` must be marked `default` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 14 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0520, E0557. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0520`. [INFO] [stdout] [INFO] [stderr] error: could not compile `tao-of-rust` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] error: aborting due to 2 previous errors; 14 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0520, E0557. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0520`. [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "756dca4d95697b57340b7155f4ae9944f662af70e06002bf63a7025d6f6e1210", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "756dca4d95697b57340b7155f4ae9944f662af70e06002bf63a7025d6f6e1210", kill_on_drop: false }` [INFO] [stdout] 756dca4d95697b57340b7155f4ae9944f662af70e06002bf63a7025d6f6e1210