[INFO] fetching crate mediawiki 0.1.16... [INFO] checking mediawiki-0.1.16 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1 [INFO] extracting crate mediawiki 0.1.16 into /workspace/builds/worker-4/source [INFO] validating manifest of crates.io crate mediawiki 0.1.16 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd [INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking crates.io crate mediawiki 0.1.16 [INFO] finished tweaking crates.io crate mediawiki 0.1.16 [INFO] tweaked toml for crates.io crate mediawiki 0.1.16 written to /workspace/builds/worker-4/source/Cargo.toml [INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 7f8f23484002cae21f2200679a07024da853e599847dc854f5ecc62cc7be7b50 [INFO] running `"docker" "start" "-a" "7f8f23484002cae21f2200679a07024da853e599847dc854f5ecc62cc7be7b50"` [INFO] [stderr] Checking urlencoding v1.0.0 [INFO] [stderr] Checking toml v0.4.10 [INFO] [stderr] Checking cookie_store v0.6.0 [INFO] [stderr] Checking user_agent v0.7.0 [INFO] [stderr] Checking config v0.9.3 [INFO] [stderr] Checking mediawiki v0.1.16 (/opt/rustwide/workdir) [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:108:50 [INFO] [stderr] | [INFO] [stderr] 108 | pub fn new(api_url: &str) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:118:26 [INFO] [stderr] | [INFO] [stderr] 118 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:165:56 [INFO] [stderr] | [INFO] [stderr] 165 | pub fn load_user_info(&mut self) -> Result<(), Box<::std::error::Error>> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:209:56 [INFO] [stderr] | [INFO] [stderr] 209 | fn load_site_info(&mut self) -> Result<&Value, Box<::std::error::Error>> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:254:73 [INFO] [stderr] | [INFO] [stderr] 254 | pub fn get_token(&mut self, token_type: &str) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:272:60 [INFO] [stderr] | [INFO] [stderr] 272 | pub fn get_edit_token(&mut self) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:280:28 [INFO] [stderr] | [INFO] [stderr] 280 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:326:28 [INFO] [stderr] | [INFO] [stderr] 326 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:353:28 [INFO] [stderr] | [INFO] [stderr] 353 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:436:28 [INFO] [stderr] | [INFO] [stderr] 436 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:444:28 [INFO] [stderr] | [INFO] [stderr] 444 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:453:28 [INFO] [stderr] | [INFO] [stderr] 453 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:493:29 [INFO] [stderr] | [INFO] [stderr] 493 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:503:29 [INFO] [stderr] | [INFO] [stderr] 503 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:512:46 [INFO] [stderr] | [INFO] [stderr] 512 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:549:29 [INFO] [stderr] | [INFO] [stderr] 549 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:605:46 [INFO] [stderr] | [INFO] [stderr] 605 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:684:46 [INFO] [stderr] | [INFO] [stderr] 684 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:718:40 [INFO] [stderr] | [INFO] [stderr] 718 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:742:29 [INFO] [stderr] | [INFO] [stderr] 742 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:756:29 [INFO] [stderr] | [INFO] [stderr] 756 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:767:25 [INFO] [stderr] | [INFO] [stderr] 767 | ) -> Result<(), Box<::std::error::Error>> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:801:66 [INFO] [stderr] | [INFO] [stderr] 801 | pub fn sparql_query(&self, query: &str) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:809:76 [INFO] [stderr] | [INFO] [stderr] 809 | pub fn extract_entity_from_uri(&self, uri: &str) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/user.rs:98:67 [INFO] [stderr] | [INFO] [stderr] 98 | pub fn load_user_info(&mut self, api: &Api) -> Result<(), Box<::std::error::Error>> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:108:50 [INFO] [stderr] | [INFO] [stderr] 108 | pub fn new(api_url: &str) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:118:26 [INFO] [stderr] | [INFO] [stderr] 118 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:165:56 [INFO] [stderr] | [INFO] [stderr] 165 | pub fn load_user_info(&mut self) -> Result<(), Box<::std::error::Error>> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:209:56 [INFO] [stderr] | [INFO] [stderr] 209 | fn load_site_info(&mut self) -> Result<&Value, Box<::std::error::Error>> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:254:73 [INFO] [stderr] | [INFO] [stderr] 254 | pub fn get_token(&mut self, token_type: &str) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:272:60 [INFO] [stderr] | [INFO] [stderr] 272 | pub fn get_edit_token(&mut self) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:280:28 [INFO] [stderr] | [INFO] [stderr] 280 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:326:28 [INFO] [stderr] | [INFO] [stderr] 326 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:353:28 [INFO] [stderr] | [INFO] [stderr] 353 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:436:28 [INFO] [stderr] | [INFO] [stderr] 436 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:444:28 [INFO] [stderr] | [INFO] [stderr] 444 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:453:28 [INFO] [stderr] | [INFO] [stderr] 453 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:493:29 [INFO] [stderr] | [INFO] [stderr] 493 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:503:29 [INFO] [stderr] | [INFO] [stderr] 503 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:512:46 [INFO] [stderr] | [INFO] [stderr] 512 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:549:29 [INFO] [stderr] | [INFO] [stderr] 549 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:605:46 [INFO] [stderr] | [INFO] [stderr] 605 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:684:46 [INFO] [stderr] | [INFO] [stderr] 684 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:718:40 [INFO] [stderr] | [INFO] [stderr] 718 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:742:29 [INFO] [stderr] | [INFO] [stderr] 742 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:756:29 [INFO] [stderr] | [INFO] [stderr] 756 | ) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:767:25 [INFO] [stderr] | [INFO] [stderr] 767 | ) -> Result<(), Box<::std::error::Error>> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:801:66 [INFO] [stderr] | [INFO] [stderr] 801 | pub fn sparql_query(&self, query: &str) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/api.rs:809:76 [INFO] [stderr] | [INFO] [stderr] 809 | pub fn extract_entity_from_uri(&self, uri: &str) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/user.rs:98:67 [INFO] [stderr] | [INFO] [stderr] 98 | pub fn load_user_info(&mut self, api: &Api) -> Result<(), Box<::std::error::Error>> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/api.rs:690:13 [INFO] [stderr] | [INFO] [stderr] 690 | let mut req; [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/api.rs:690:13 [INFO] [stderr] | [INFO] [stderr] 690 | let mut req; [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/bin/main.rs:146:75 [INFO] [stderr] | [INFO] [stderr] 146 | fn _edit_sandbox_item(api: &mut mediawiki::api::Api) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/bin/main.rs:146:75 [INFO] [stderr] | [INFO] [stderr] 146 | fn _edit_sandbox_item(api: &mut mediawiki::api::Api) -> Result> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 8.91s [INFO] running `"docker" "inspect" "7f8f23484002cae21f2200679a07024da853e599847dc854f5ecc62cc7be7b50"` [INFO] running `"docker" "rm" "-f" "7f8f23484002cae21f2200679a07024da853e599847dc854f5ecc62cc7be7b50"` [INFO] [stdout] 7f8f23484002cae21f2200679a07024da853e599847dc854f5ecc62cc7be7b50