[INFO] fetching crate expectation 0.1.1...
[INFO] testing expectation-0.1.1 against 1.54.0 for beta-1.55-1
[INFO] extracting crate expectation 0.1.1 into /workspace/builds/worker-33/source
[INFO] validating manifest of crates.io crate expectation 0.1.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate expectation 0.1.1
[INFO] finished tweaking crates.io crate expectation 0.1.1
[INFO] tweaked toml for crates.io crate expectation 0.1.1 written to /workspace/builds/worker-33/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11578df48ca1a4a1d4e33d144586894cd0dd063a89d67d7ab1f19aac237c42ac
[INFO] running `Command { std: "docker" "start" "-a" "11578df48ca1a4a1d4e33d144586894cd0dd063a89d67d7ab1f19aac237c42ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11578df48ca1a4a1d4e33d144586894cd0dd063a89d67d7ab1f19aac237c42ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11578df48ca1a4a1d4e33d144586894cd0dd063a89d67d7ab1f19aac237c42ac", kill_on_drop: false }`
[INFO] [stdout] 11578df48ca1a4a1d4e33d144586894cd0dd063a89d67d7ab1f19aac237c42ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75e69bbb7392cf42b193def69121bdd9df35a9d9d747f393962acd309510bb49
[INFO] running `Command { std: "docker" "start" "-a" "75e69bbb7392cf42b193def69121bdd9df35a9d9d747f393962acd309510bb49", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling gif v0.10.3
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.22
[INFO] [stderr]    Compiling image v0.19.0
[INFO] [stderr]    Compiling expectation-shared v0.1.0
[INFO] [stderr]    Compiling expectation v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/provider.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub(crate) fs: Box<FileSystem>,
[INFO] [stdout]   |                        ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Fn: for<'a> FnMut(&'a mut Write) -> IoResult<()>,
[INFO] [stdout]    |                                   ^^^^^ help: use `dyn`: `dyn Write`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:27:32
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stdout]    |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:27:50
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stdout]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 | /             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout] 30 | |                 -> IoResult<()>,
[INFO] [stdout]    | |_______________________________^
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 |             dyn for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout] 30 |                 -> IoResult<()>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout]    |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:29:50
[INFO] [stdout]    |
[INFO] [stdout] 29 |             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:36:29
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub(crate) root_fs: Box<FileSystem>,
[INFO] [stdout]    |                             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:37:24
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub(crate) fs: Box<FileSystem>,
[INFO] [stdout]    |                        ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:44:21
[INFO] [stdout]    |
[INFO] [stdout] 44 |     filesystem: Box<FileSystem>,
[INFO] [stdout]    |                     ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:60:28
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn new(filesystem: Box<FileSystem>, path: PathBuf) -> Self {
[INFO] [stdout]    |                            ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:80:36
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub(crate) fn new(root_fs: Box<FileSystem>, fs: Box<FileSystem>) -> Provider {
[INFO] [stdout]    |                                    ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:80:57
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub(crate) fn new(root_fs: Box<FileSystem>, fs: Box<FileSystem>) -> Provider {
[INFO] [stdout]    |                                                         ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:122:31
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:122:32
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:122:51
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:122:52
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                                                    ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:123:31
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:123:32
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:123:51
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:123:52
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                                                    ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fs: Box<FileSystem>,
[INFO] [stdout]     |             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]   --> src/lib.rs:46:21
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let name = name.trim_left_matches("expectation_test_");
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start_matches`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 writeln!(w, "image formats are different");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |                 writeln!(w, "actual:   RGB8");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:138:17
[INFO] [stdout]     |
[INFO] [stdout] 138 |                 writeln!(w, "expected: RGBA8 (Alpha)");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:144:17
[INFO] [stdout]     |
[INFO] [stdout] 144 |                 writeln!(w, "image formats are different");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:145:17
[INFO] [stdout]     |
[INFO] [stdout] 145 |                 writeln!(w, "actual:   RGBA8 (Alpha)");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |                 writeln!(w, "expected: RGB8");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 30 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.67s
[INFO] running `Command { std: "docker" "inspect" "75e69bbb7392cf42b193def69121bdd9df35a9d9d747f393962acd309510bb49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75e69bbb7392cf42b193def69121bdd9df35a9d9d747f393962acd309510bb49", kill_on_drop: false }`
[INFO] [stdout] 75e69bbb7392cf42b193def69121bdd9df35a9d9d747f393962acd309510bb49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3adfb0f1e98f21db837a60a9e4763f350199abfd6fa9953c190815ef762c90ea
[INFO] running `Command { std: "docker" "start" "-a" "3adfb0f1e98f21db837a60a9e4763f350199abfd6fa9953c190815ef762c90ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling expectation v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/provider.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub(crate) fs: Box<FileSystem>,
[INFO] [stdout]   |                        ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Fn: for<'a> FnMut(&'a mut Write) -> IoResult<()>,
[INFO] [stdout]    |                                   ^^^^^ help: use `dyn`: `dyn Write`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:27:32
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stdout]    |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:27:50
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stdout]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 | /             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout] 30 | |                 -> IoResult<()>,
[INFO] [stdout]    | |_______________________________^
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 |             dyn for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout] 30 |                 -> IoResult<()>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout]    |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:29:50
[INFO] [stdout]    |
[INFO] [stdout] 29 |             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:36:29
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub(crate) root_fs: Box<FileSystem>,
[INFO] [stdout]    |                             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:37:24
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub(crate) fs: Box<FileSystem>,
[INFO] [stdout]    |                        ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:44:21
[INFO] [stdout]    |
[INFO] [stdout] 44 |     filesystem: Box<FileSystem>,
[INFO] [stdout]    |                     ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:60:28
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn new(filesystem: Box<FileSystem>, path: PathBuf) -> Self {
[INFO] [stdout]    |                            ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:80:36
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub(crate) fn new(root_fs: Box<FileSystem>, fs: Box<FileSystem>) -> Provider {
[INFO] [stdout]    |                                    ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:80:57
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub(crate) fn new(root_fs: Box<FileSystem>, fs: Box<FileSystem>) -> Provider {
[INFO] [stdout]    |                                                         ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:122:31
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:122:32
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:122:51
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:122:52
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                                                    ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:123:31
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:123:32
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:123:51
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:123:52
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                                                    ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fs: Box<FileSystem>,
[INFO] [stdout]     |             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]   --> src/lib.rs:46:21
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let name = name.trim_left_matches("expectation_test_");
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start_matches`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 writeln!(w, "image formats are different");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |                 writeln!(w, "actual:   RGB8");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:138:17
[INFO] [stdout]     |
[INFO] [stdout] 138 |                 writeln!(w, "expected: RGBA8 (Alpha)");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:144:17
[INFO] [stdout]     |
[INFO] [stdout] 144 |                 writeln!(w, "image formats are different");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:145:17
[INFO] [stdout]     |
[INFO] [stdout] 145 |                 writeln!(w, "actual:   RGBA8 (Alpha)");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |                 writeln!(w, "expected: RGB8");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 30 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/provider.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub(crate) fs: Box<FileSystem>,
[INFO] [stdout]   |                        ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Fn: for<'a> FnMut(&'a mut Write) -> IoResult<()>,
[INFO] [stdout]    |                                   ^^^^^ help: use `dyn`: `dyn Write`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:27:32
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stdout]    |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:27:50
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stdout]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 | /             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout] 30 | |                 -> IoResult<()>,
[INFO] [stdout]    | |_______________________________^
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 |             dyn for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout] 30 |                 -> IoResult<()>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout]    |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:29:50
[INFO] [stdout]    |
[INFO] [stdout] 29 |             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stdout]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:36:29
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub(crate) root_fs: Box<FileSystem>,
[INFO] [stdout]    |                             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:37:24
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub(crate) fs: Box<FileSystem>,
[INFO] [stdout]    |                        ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:44:21
[INFO] [stdout]    |
[INFO] [stdout] 44 |     filesystem: Box<FileSystem>,
[INFO] [stdout]    |                     ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:60:28
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn new(filesystem: Box<FileSystem>, path: PathBuf) -> Self {
[INFO] [stdout]    |                            ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:80:36
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub(crate) fn new(root_fs: Box<FileSystem>, fs: Box<FileSystem>) -> Provider {
[INFO] [stdout]    |                                    ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/provider.rs:80:57
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub(crate) fn new(root_fs: Box<FileSystem>, fs: Box<FileSystem>) -> Provider {
[INFO] [stdout]    |                                                         ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:122:31
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:122:32
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:122:51
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:122:52
[INFO] [stdout]     |
[INFO] [stdout] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stdout]     |                                                    ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:123:31
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:123:32
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/provider.rs:123:51
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:123:52
[INFO] [stdout]     |
[INFO] [stdout] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stdout]     |                                                    ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/provider.rs:141:61
[INFO] [stdout]     |
[INFO] [stdout] 141 |     let filesystem = Box::new(FakeFileSystem::new()) as Box<FileSystem>;
[INFO] [stdout]     |                                                             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fs: Box<FileSystem>,
[INFO] [stdout]     |             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[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 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]   --> src/lib.rs:46:21
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let name = name.trim_left_matches("expectation_test_");
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start_matches`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 writeln!(w, "image formats are different");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:137:17
[INFO] [stdout]     |
[INFO] [stdout] 137 |                 writeln!(w, "actual:   RGB8");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:138:17
[INFO] [stdout]     |
[INFO] [stdout] 138 |                 writeln!(w, "expected: RGBA8 (Alpha)");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:144:17
[INFO] [stdout]     |
[INFO] [stdout] 144 |                 writeln!(w, "image formats are different");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:145:17
[INFO] [stdout]     |
[INFO] [stdout] 145 |                 writeln!(w, "actual:   RGBA8 (Alpha)");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/extensions/image.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |                 writeln!(w, "expected: RGB8");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.21s
[INFO] running `Command { std: "docker" "inspect" "3adfb0f1e98f21db837a60a9e4763f350199abfd6fa9953c190815ef762c90ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3adfb0f1e98f21db837a60a9e4763f350199abfd6fa9953c190815ef762c90ea", kill_on_drop: false }`
[INFO] [stdout] 3adfb0f1e98f21db837a60a9e4763f350199abfd6fa9953c190815ef762c90ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-33/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b6c28eba61dfbc42e9ece4c37c757ab44765c3b1b8cbceafa4b8ce02af25ad80
[INFO] running `Command { std: "docker" "start" "-a" "b6c28eba61dfbc42e9ece4c37c757ab44765c3b1b8cbceafa4b8ce02af25ad80", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/provider.rs:8:24
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub(crate) fs: Box<FileSystem>,
[INFO] [stderr]   |                        ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:16:35
[INFO] [stderr]    |
[INFO] [stderr] 16 |         Fn: for<'a> FnMut(&'a mut Write) -> IoResult<()>,
[INFO] [stderr]    |                                   ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:27:32
[INFO] [stderr]    |
[INFO] [stderr] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stderr]    |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:27:50
[INFO] [stderr]    |
[INFO] [stderr] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stderr]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 | /             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stderr] 30 | |                 -> IoResult<()>,
[INFO] [stderr]    | |_______________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 29 |             dyn for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stderr] 30 |                 -> IoResult<()>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:29:32
[INFO] [stderr]    |
[INFO] [stderr] 29 |             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stderr]    |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:29:50
[INFO] [stderr]    |
[INFO] [stderr] 29 |             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stderr]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:36:29
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub(crate) root_fs: Box<FileSystem>,
[INFO] [stderr]    |                             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:37:24
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub(crate) fs: Box<FileSystem>,
[INFO] [stderr]    |                        ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:44:21
[INFO] [stderr]    |
[INFO] [stderr] 44 |     filesystem: Box<FileSystem>,
[INFO] [stderr]    |                     ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:60:28
[INFO] [stderr]    |
[INFO] [stderr] 60 |     fn new(filesystem: Box<FileSystem>, path: PathBuf) -> Self {
[INFO] [stderr]    |                            ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:80:36
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub(crate) fn new(root_fs: Box<FileSystem>, fs: Box<FileSystem>) -> Provider {
[INFO] [stderr]    |                                    ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:80:57
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub(crate) fn new(root_fs: Box<FileSystem>, fs: Box<FileSystem>) -> Provider {
[INFO] [stderr]    |                                                         ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/provider.rs:122:31
[INFO] [stderr]     |
[INFO] [stderr] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stderr]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/provider.rs:122:32
[INFO] [stderr]     |
[INFO] [stderr] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stderr]     |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/provider.rs:122:51
[INFO] [stderr]     |
[INFO] [stderr] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stderr]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/provider.rs:122:52
[INFO] [stderr]     |
[INFO] [stderr] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stderr]     |                                                    ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/provider.rs:123:31
[INFO] [stderr]     |
[INFO] [stderr] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stderr]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/provider.rs:123:32
[INFO] [stderr]     |
[INFO] [stderr] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stderr]     |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/provider.rs:123:51
[INFO] [stderr]     |
[INFO] [stderr] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stderr]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/provider.rs:123:52
[INFO] [stderr]     |
[INFO] [stderr] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stderr]     |                                                    ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:109:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fs: Box<FileSystem>,
[INFO] [stderr]     |             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stderr]   --> src/lib.rs:46:21
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let name = name.trim_left_matches("expectation_test_");
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start_matches`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:136:17
[INFO] [stderr]     |
[INFO] [stderr] 136 |                 writeln!(w, "image formats are different");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:137:17
[INFO] [stderr]     |
[INFO] [stderr] 137 |                 writeln!(w, "actual:   RGB8");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:138:17
[INFO] [stderr]     |
[INFO] [stderr] 138 |                 writeln!(w, "expected: RGBA8 (Alpha)");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:144:17
[INFO] [stderr]     |
[INFO] [stderr] 144 |                 writeln!(w, "image formats are different");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:145:17
[INFO] [stderr]     |
[INFO] [stderr] 145 |                 writeln!(w, "actual:   RGBA8 (Alpha)");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:146:17
[INFO] [stderr]     |
[INFO] [stderr] 146 |                 writeln!(w, "expected: RGB8");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 30 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/provider.rs:8:24
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub(crate) fs: Box<FileSystem>,
[INFO] [stderr]   |                        ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:16:35
[INFO] [stderr]    |
[INFO] [stderr] 16 |         Fn: for<'a> FnMut(&'a mut Write) -> IoResult<()>,
[INFO] [stderr]    |                                   ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:27:32
[INFO] [stderr]    |
[INFO] [stderr] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stderr]    |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:27:50
[INFO] [stderr]    |
[INFO] [stderr] 27 |         Box<for<'a> Fn(&'a mut ReadSeek, &'a mut ReadSeek) -> IoResult<bool>>,
[INFO] [stderr]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 | /             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stderr] 30 | |                 -> IoResult<()>,
[INFO] [stderr]    | |_______________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 29 |             dyn for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stderr] 30 |                 -> IoResult<()>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:29:32
[INFO] [stderr]    |
[INFO] [stderr] 29 |             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stderr]    |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:29:50
[INFO] [stderr]    |
[INFO] [stderr] 29 |             for<'b> Fn(&'b mut ReadSeek, &'b mut ReadSeek, &'b Path, &'b mut WriteRequester)
[INFO] [stderr]    |                                                  ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:36:29
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub(crate) root_fs: Box<FileSystem>,
[INFO] [stderr]    |                             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:37:24
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub(crate) fs: Box<FileSystem>,
[INFO] [stderr]    |                        ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:44:21
[INFO] [stderr]    |
[INFO] [stderr] 44 |     filesystem: Box<FileSystem>,
[INFO] [stderr]    |                     ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:60:28
[INFO] [stderr]    |
[INFO] [stderr] 60 |     fn new(filesystem: Box<FileSystem>, path: PathBuf) -> Self {
[INFO] [stderr]    |                            ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:80:36
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub(crate) fn new(root_fs: Box<FileSystem>, fs: Box<FileSystem>) -> Provider {
[INFO] [stderr]    |                                    ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/provider.rs:80:57
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub(crate) fn new(root_fs: Box<FileSystem>, fs: Box<FileSystem>) -> Provider {
[INFO] [stderr]    |                                                         ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/provider.rs:122:31
[INFO] [stderr]     |
[INFO] [stderr] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stderr]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/provider.rs:122:32
[INFO] [stderr]     |
[INFO] [stderr] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stderr]     |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/provider.rs:122:51
[INFO] [stderr]     |
[INFO] [stderr] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stderr]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/provider.rs:122:52
[INFO] [stderr]     |
[INFO] [stderr] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stderr]     |                                                    ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/provider.rs:123:31
[INFO] [stderr]     |
[INFO] [stderr] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stderr]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/provider.rs:123:32
[INFO] [stderr]     |
[INFO] [stderr] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stderr]     |                                ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/provider.rs:123:51
[INFO] [stderr]     |
[INFO] [stderr] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stderr]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/provider.rs:123:52
[INFO] [stderr]     |
[INFO] [stderr] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stderr]     |                                                    ^^^^^^^^ help: use `dyn`: `dyn ReadSeek`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/provider.rs:141:61
[INFO] [stderr]     |
[INFO] [stderr] 141 |     let filesystem = Box::new(FakeFileSystem::new()) as Box<FileSystem>;
[INFO] [stderr]     |                                                             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:109:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fs: Box<FileSystem>,
[INFO] [stderr]     |             ^^^^^^^^^^ help: use `dyn`: `dyn FileSystem`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stderr]   --> src/lib.rs:46:21
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let name = name.trim_left_matches("expectation_test_");
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start_matches`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:136:17
[INFO] [stderr]     |
[INFO] [stderr] 136 |                 writeln!(w, "image formats are different");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:137:17
[INFO] [stderr]     |
[INFO] [stderr] 137 |                 writeln!(w, "actual:   RGB8");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:138:17
[INFO] [stderr]     |
[INFO] [stderr] 138 |                 writeln!(w, "expected: RGBA8 (Alpha)");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:144:17
[INFO] [stderr]     |
[INFO] [stderr] 144 |                 writeln!(w, "image formats are different");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:145:17
[INFO] [stderr]     |
[INFO] [stderr] 145 |                 writeln!(w, "actual:   RGBA8 (Alpha)");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/extensions/image.rs:146:17
[INFO] [stderr]     |
[INFO] [stderr] 146 |                 writeln!(w, "expected: RGB8");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 31 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.35s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/expectation-2bbc647cc3eb299c)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test provider::writer_does_not_write_to_filesystem_if_not_written_to ... ok
[INFO] [stdout] test test::not_used_provider ... ok
[INFO] [stdout] test test::provider_used_more_than_once ... ok
[INFO] [stdout] test test::validate_on_no_files ... ok
[INFO] [stdout] test test::validate_one_file_actual_not_found ... ok
[INFO] [stdout] test test::validate_one_file_diff_is_bad ... ok
[INFO] [stderr]    Doc-tests expectation
[INFO] [stdout] test test::validate_one_file_expected_not_found ... ok
[INFO] [stdout] test test::provider_used_once ... ok
[INFO] [stdout] test test::validate_one_file_diff_is_bad_with_text_extension ... ok
[INFO] [stdout] test test::validate_one_file_expected_not_found_subdir ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/provider.rs:122:31
[INFO] [stderr]     |
[INFO] [stderr] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stderr]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] running 0 tests
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    --> /opt/rustwide/workdir/src/provider.rs:122:51
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stderr] 122 |         C: for<'a> Fn(&'a mut (ReadSeek), &'a mut (ReadSeek)) -> IoResult<bool> + 'static,
[INFO] [stderr]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/provider.rs:123:31
[INFO] [stderr]     |
[INFO] [stderr] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stderr]     |                               ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/provider.rs:123:51
[INFO] [stderr]     |
[INFO] [stderr] 123 |         D: for<'b> Fn(&'b mut (ReadSeek), &'b mut (ReadSeek), &'b Path, &'b mut WriteRequester) -> IoResult<()>
[INFO] [stderr]     |                                                   ^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] running `Command { std: "docker" "inspect" "b6c28eba61dfbc42e9ece4c37c757ab44765c3b1b8cbceafa4b8ce02af25ad80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6c28eba61dfbc42e9ece4c37c757ab44765c3b1b8cbceafa4b8ce02af25ad80", kill_on_drop: false }`
[INFO] [stdout] b6c28eba61dfbc42e9ece4c37c757ab44765c3b1b8cbceafa4b8ce02af25ad80
