[INFO] fetching crate tokio-coap 0.2.0... [INFO] checking tokio-coap-0.2.0 against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050 [INFO] extracting crate tokio-coap 0.2.0 into /workspace/builds/worker-3/source [INFO] validating manifest of crates.io crate tokio-coap 0.2.0 on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate tokio-coap 0.2.0 [INFO] finished tweaking crates.io crate tokio-coap 0.2.0 [INFO] tweaked toml for crates.io crate tokio-coap 0.2.0 written to /workspace/builds/worker-3/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded smallvec v0.5.1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f3d3ef51c3f22b285c60a6f34c73cbf32173b4d96604cd2adc9fd2955217f02f [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" "f3d3ef51c3f22b285c60a6f34c73cbf32173b4d96604cd2adc9fd2955217f02f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f3d3ef51c3f22b285c60a6f34c73cbf32173b4d96604cd2adc9fd2955217f02f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f3d3ef51c3f22b285c60a6f34c73cbf32173b4d96604cd2adc9fd2955217f02f", kill_on_drop: false }` [INFO] [stdout] f3d3ef51c3f22b285c60a6f34c73cbf32173b4d96604cd2adc9fd2955217f02f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] d544038b9fd889b4584c3b4f9d29dc10c70b10e7631aaa11c27fcf22c8e5ca1d [INFO] running `Command { std: "docker" "start" "-a" "d544038b9fd889b4584c3b4f9d29dc10c70b10e7631aaa11c27fcf22c8e5ca1d", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Compiling libc v0.2.98 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Checking futures v0.1.31 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Checking scopeguard v1.1.0 [INFO] [stderr] Checking slab v0.4.3 [INFO] [stderr] Checking byteorder v1.4.3 [INFO] [stderr] Checking fnv v1.0.7 [INFO] [stderr] Checking smallvec v0.5.1 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stderr] Checking aho-corasick v0.6.10 [INFO] [stderr] Checking log v0.4.14 [INFO] [stderr] Checking lock_api v0.3.4 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Checking log v0.3.9 [INFO] [stderr] Checking regex v0.2.11 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [INFO] [stderr] Compiling memoffset v0.5.6 [INFO] [stderr] Compiling crossbeam-epoch v0.8.2 [INFO] [stderr] Checking smallvec v0.6.14 [INFO] [stderr] Compiling parking_lot_core v0.6.2 [INFO] [stderr] Compiling parking_lot v0.9.0 [INFO] [stderr] Checking iovec v0.1.4 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking net2 v0.2.37 [INFO] [stderr] Checking tokio-sync v0.1.8 [INFO] [stderr] Checking bytes v0.4.12 [INFO] [stderr] Checking mio v0.6.23 [INFO] [stderr] Checking env_logger v0.4.3 [INFO] [stderr] Checking tokio-executor v0.1.10 [INFO] [stderr] Checking crossbeam-queue v0.2.3 [INFO] [stderr] Checking tokio-io v0.1.13 [INFO] [stderr] Checking tokio-current-thread v0.1.7 [INFO] [stderr] Checking tokio-timer v0.2.13 [INFO] [stderr] Checking crossbeam-deque v0.7.3 [INFO] [stderr] Checking mio-uds v0.6.8 [INFO] [stderr] Checking tokio-reactor v0.1.12 [INFO] [stderr] Checking tokio-codec v0.1.2 [INFO] [stderr] Checking tokio-threadpool v0.1.18 [INFO] [stderr] Checking tokio-udp v0.1.6 [INFO] [stderr] Checking tokio-uds v0.2.7 [INFO] [stderr] Checking tokio-tcp v0.1.4 [INFO] [stderr] Checking tokio-fs v0.1.7 [INFO] [stderr] Checking tokio v0.1.22 [INFO] [stderr] Checking tokio-coap v0.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition. [INFO] [stdout] --> src/message/option/mod.rs:81:12 [INFO] [stdout] | [INFO] [stdout] 81 | fn new(Self::Format) -> Self; [INFO] [stdout] | ^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: Self::Format` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(anonymous_parameters)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018! [INFO] [stdout] = note: for more information, see issue #41686 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:102:10 [INFO] [stdout] | [INFO] [stdout] 102 | 0...12 => delta, [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 is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:103:11 [INFO] [stdout] | [INFO] [stdout] 103 | 13...268 => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:107:12 [INFO] [stdout] | [INFO] [stdout] 107 | 269...64999 => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:116:10 [INFO] [stdout] | [INFO] [stdout] 116 | 0...12 => length, [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:117:11 [INFO] [stdout] | [INFO] [stdout] 117 | 13...268 => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:121:12 [INFO] [stdout] | [INFO] [stdout] 121 | 269...64999 => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/mod.rs:252:22 [INFO] [stdout] | [INFO] [stdout] 252 | d @ 0...12 => d as u16, [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/mod.rs:265:22 [INFO] [stdout] | [INFO] [stdout] 265 | d @ 0...12 => d as u16, [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition. [INFO] [stdout] --> src/message/option/mod.rs:81:12 [INFO] [stdout] | [INFO] [stdout] 81 | fn new(Self::Format) -> Self; [INFO] [stdout] | ^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: Self::Format` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(anonymous_parameters)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018! [INFO] [stdout] = note: for more information, see issue #41686 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:102:10 [INFO] [stdout] | [INFO] [stdout] 102 | 0...12 => delta, [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 is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:103:11 [INFO] [stdout] | [INFO] [stdout] 103 | 13...268 => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:107:12 [INFO] [stdout] | [INFO] [stdout] 107 | 269...64999 => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:116:10 [INFO] [stdout] | [INFO] [stdout] 116 | 0...12 => length, [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:117:11 [INFO] [stdout] | [INFO] [stdout] 117 | 13...268 => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/option/mod.rs:121:12 [INFO] [stdout] | [INFO] [stdout] 121 | 269...64999 => { [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/mod.rs:252:22 [INFO] [stdout] | [INFO] [stdout] 252 | d @ 0...12 => d as u16, [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `...` range patterns are deprecated [INFO] [stdout] --> src/message/mod.rs:265:22 [INFO] [stdout] | [INFO] [stdout] 265 | d @ 0...12 => d as u16, [INFO] [stdout] | ^^^ help: use `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> benches/message.rs:17:20 [INFO] [stdout] | [INFO] [stdout] 17 | token: vec![34,65], [INFO] [stdout] | ^^^^^^^^^^^ expected struct `smallvec::SmallVec`, found struct `Vec` [INFO] [stdout] | [INFO] [stdout] = note: expected struct `smallvec::SmallVec<[u8; 8]>` [INFO] [stdout] found struct `Vec<{integer}>` [INFO] [stdout] = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> benches/message.rs:18:22 [INFO] [stdout] | [INFO] [stdout] 18 | options: vec![], [INFO] [stdout] | ^^^^^^ expected struct `tokio_coap::message::option::Options`, found struct `Vec` [INFO] [stdout] | [INFO] [stdout] = note: expected struct `tokio_coap::message::option::Options` [INFO] [stdout] found struct `Vec<_>` [INFO] [stdout] = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> benches/message.rs:32:20 [INFO] [stdout] | [INFO] [stdout] 32 | token: vec![], [INFO] [stdout] | ^^^^^^ expected struct `smallvec::SmallVec`, found struct `Vec` [INFO] [stdout] | [INFO] [stdout] = note: expected struct `smallvec::SmallVec<[u8; 8]>` [INFO] [stdout] found struct `Vec<_>` [INFO] [stdout] = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0191]: the value of the associated type `Format` (from trait `tokio_coap::message::option::Option`) must be specified [INFO] [stdout] --> benches/message.rs:33:27 [INFO] [stdout] | [INFO] [stdout] 33 | options: vec![Option::UriPath("1a".to_string()), [INFO] [stdout] | ^^^^^^ help: specify the associated type: `Option` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0599]: no associated item named `UriPath` found for trait object `dyn tokio_coap::message::option::Option` in the current scope [INFO] [stdout] --> benches/message.rs:33:35 [INFO] [stdout] | [INFO] [stdout] 33 | options: vec![Option::UriPath("1a".to_string()), [INFO] [stdout] | ^^^^^^^ associated item not found in `dyn tokio_coap::message::option::Option` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0191]: the value of the associated type `Format` (from trait `tokio_coap::message::option::Option`) must be specified [INFO] [stdout] --> benches/message.rs:34:27 [INFO] [stdout] | [INFO] [stdout] 34 | Option::UriPath("temp".to_string()), [INFO] [stdout] | ^^^^^^ help: specify the associated type: `Option` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0599]: no associated item named `UriPath` found for trait object `dyn tokio_coap::message::option::Option` in the current scope [INFO] [stdout] --> benches/message.rs:34:35 [INFO] [stdout] | [INFO] [stdout] 34 | Option::UriPath("temp".to_string()), [INFO] [stdout] | ^^^^^^^ associated item not found in `dyn tokio_coap::message::option::Option` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0191]: the value of the associated type `Format` (from trait `tokio_coap::message::option::Option`) must be specified [INFO] [stdout] --> benches/message.rs:35:27 [INFO] [stdout] | [INFO] [stdout] 35 | Option::UriQuery("a32c85ba9dda45823be416246cf8b433baa068d7" [INFO] [stdout] | ^^^^^^ help: specify the associated type: `Option` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0599]: no associated item named `UriQuery` found for trait object `dyn tokio_coap::message::option::Option` in the current scope [INFO] [stdout] --> benches/message.rs:35:35 [INFO] [stdout] | [INFO] [stdout] 35 | Option::UriQuery("a32c85ba9dda45823be416246cf8b433baa068d7" [INFO] [stdout] | ^^^^^^^^ associated item not found in `dyn tokio_coap::message::option::Option` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> benches/message.rs:33:22 [INFO] [stdout] | [INFO] [stdout] 33 | options: vec![Option::UriPath("1a".to_string()), [INFO] [stdout] | ______________________^ [INFO] [stdout] 34 | | Option::UriPath("temp".to_string()), [INFO] [stdout] 35 | | Option::UriQuery("a32c85ba9dda45823be416246cf8b433baa068d7" [INFO] [stdout] 36 | | .to_string())], [INFO] [stdout] | |____________________________________________^ expected struct `tokio_coap::message::option::Options`, found struct `Vec` [INFO] [stdout] | [INFO] [stdout] = note: expected struct `tokio_coap::message::option::Options` [INFO] [stdout] found struct `Vec<_, _>` [INFO] [stdout] = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 10 previous errors [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0191, E0308, E0599. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0191`. [INFO] [stdout] [INFO] [stderr] error: could not compile `tokio-coap` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `Command { std: "docker" "inspect" "d544038b9fd889b4584c3b4f9d29dc10c70b10e7631aaa11c27fcf22c8e5ca1d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d544038b9fd889b4584c3b4f9d29dc10c70b10e7631aaa11c27fcf22c8e5ca1d", kill_on_drop: false }` [INFO] [stdout] d544038b9fd889b4584c3b4f9d29dc10c70b10e7631aaa11c27fcf22c8e5ca1d