[INFO] fetching crate vg 0.0.0-obsolete...
[INFO] testing vg-0.0.0-obsolete against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate vg 0.0.0-obsolete into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate vg 0.0.0-obsolete on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vg 0.0.0-obsolete
[INFO] finished tweaking crates.io crate vg 0.0.0-obsolete
[INFO] tweaked toml for crates.io crate vg 0.0.0-obsolete written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7cc0dbf1b7a9f9c7bb59cf02561c10cb8ff1fbd0d6c69992a0dd5f252b6be63
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d7cc0dbf1b7a9f9c7bb59cf02561c10cb8ff1fbd0d6c69992a0dd5f252b6be63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7cc0dbf1b7a9f9c7bb59cf02561c10cb8ff1fbd0d6c69992a0dd5f252b6be63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7cc0dbf1b7a9f9c7bb59cf02561c10cb8ff1fbd0d6c69992a0dd5f252b6be63", kill_on_drop: false }`
[INFO] [stdout] d7cc0dbf1b7a9f9c7bb59cf02561c10cb8ff1fbd0d6c69992a0dd5f252b6be63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a7c368305e6ab8db2a316e1b2a0684a5fa084ecb9bb776cafcd33d182b419f99
[INFO] running `Command { std: "docker" "start" "-a" "a7c368305e6ab8db2a316e1b2a0684a5fa084ecb9bb776cafcd33d182b419f99", kill_on_drop: false }`
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling png v0.15.3
[INFO] [stderr]    Compiling vg v0.0.0-obsolete (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.88s
[INFO] running `Command { std: "docker" "inspect" "a7c368305e6ab8db2a316e1b2a0684a5fa084ecb9bb776cafcd33d182b419f99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7c368305e6ab8db2a316e1b2a0684a5fa084ecb9bb776cafcd33d182b419f99", kill_on_drop: false }`
[INFO] [stdout] a7c368305e6ab8db2a316e1b2a0684a5fa084ecb9bb776cafcd33d182b419f99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aad3d6290418aeb8165925b44de29c5a7f27d4666b6cf740e97f15f08fb2425a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "aad3d6290418aeb8165925b44de29c5a7f27d4666b6cf740e97f15f08fb2425a", kill_on_drop: false }`
[INFO] [stderr]    Compiling vg v0.0.0-obsolete (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "aad3d6290418aeb8165925b44de29c5a7f27d4666b6cf740e97f15f08fb2425a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aad3d6290418aeb8165925b44de29c5a7f27d4666b6cf740e97f15f08fb2425a", kill_on_drop: false }`
[INFO] [stdout] aad3d6290418aeb8165925b44de29c5a7f27d4666b6cf740e97f15f08fb2425a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] dd93f29de7a88a863d6d52bcf5dff444c24311e30be2b69e39ac40a8537745b3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dd93f29de7a88a863d6d52bcf5dff444c24311e30be2b69e39ac40a8537745b3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.18s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/vg-eda0818b58ed646c
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests vg
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/assets.rs - assets (line 6) ... FAILED
[INFO] [stdout] test src/assets.rs - assets (line 15) ... FAILED
[INFO] [stdout] test src/assets.rs - assets::Assets (line 133) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/assets.rs - assets (line 6) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `vg::assets::generate_asset_packs`
[INFO] [stdout]  --> src/assets.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use vg::assets::generate_asset_packs;
[INFO] [stdout]   |     ^^^^^^^^^^^^--------------------
[INFO] [stdout]   |     |           |
[INFO] [stdout]   |     |           help: a similar name exists in the module: `generate_asset_pack`
[INFO] [stdout]   |     no `generate_asset_packs` in `assets`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `generate_asset_pack` in this scope
[INFO] [stdout]  --> src/assets.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     generate_asset_pack("assets/", "assets.vgpack");
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]   |
[INFO] [stdout] 3 | use vg::assets::generate_asset_pack;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0432.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/assets.rs - assets (line 15) stdout ----
[INFO] [stdout] error: cannot find macro `asset_pack` in this scope
[INFO] [stdout]  --> src/assets.rs:16:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | const ASSETS: Assets = asset_pack!("assets.vgpack");
[INFO] [stdout]   |                        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider importing this macro:
[INFO] [stdout]           vg::asset_pack
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ASSETS`
[INFO] [stdout]  --> src/assets.rs:20:18
[INFO] [stdout]   |
[INFO] [stdout] 8 | let config_str = ASSETS::str("config.toml")?;
[INFO] [stdout]   |                  ^^^^^^ use of undeclared type `ASSETS`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ASSETS`
[INFO] [stdout]  --> src/assets.rs:21:14
[INFO] [stdout]   |
[INFO] [stdout] 9 | let splash = ASSETS::assets("textures")?.bin("splash.png")?;
[INFO] [stdout]   |              ^^^^^^ use of undeclared type `ASSETS`
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Assets` in this scope
[INFO] [stdout]  --> src/assets.rs:16:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | const ASSETS: Assets = asset_pack!("assets.vgpack");
[INFO] [stdout]   |               ^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 3 | use vg::assets::Assets;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`)
[INFO] [stdout]   --> src/assets.rs:20:18
[INFO] [stdout]    |
[INFO] [stdout] 3  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_assets_rs_15_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 4  | | const ASSETS: Assets = asset_pack!("assets.vgpack");
[INFO] [stdout] 5  | |
[INFO] [stdout] 6  | | // ...
[INFO] [stdout] 7  | |
[INFO] [stdout] 8  | | let config_str = ASSETS::str("config.toml")?;
[INFO] [stdout]    | |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 9  | | let splash = ASSETS::assets("textures")?.bin("splash.png")?;
[INFO] [stdout] 10 | | }; _doctest_main_src_assets_rs_15_0() }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_error`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`)
[INFO] [stdout]   --> src/assets.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 3  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_assets_rs_15_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 4  | | const ASSETS: Assets = asset_pack!("assets.vgpack");
[INFO] [stdout] 5  | |
[INFO] [stdout] 6  | | // ...
[INFO] [stdout] ...  |
[INFO] [stdout] 9  | | let splash = ASSETS::assets("textures")?.bin("splash.png")?;
[INFO] [stdout]    | |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 10 | | }; _doctest_main_src_assets_rs_15_0() }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_error`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`)
[INFO] [stdout]   --> src/assets.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 3  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_assets_rs_15_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 4  | | const ASSETS: Assets = asset_pack!("assets.vgpack");
[INFO] [stdout] 5  | |
[INFO] [stdout] 6  | | // ...
[INFO] [stdout] ...  |
[INFO] [stdout] 9  | | let splash = ASSETS::assets("textures")?.bin("splash.png")?;
[INFO] [stdout]    | |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 10 | | }; _doctest_main_src_assets_rs_15_0() }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_error`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0412, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/assets.rs - assets::Assets (line 133) stdout ----
[INFO] [stdout] error: cannot find macro `asset_pack` in this scope
[INFO] [stdout]  --> src/assets.rs:134:26
[INFO] [stdout]   |
[INFO] [stdout] 4 | const TEXTURES: Assets = asset_pack!("textures_new.vgpack");
[INFO] [stdout]   |                          ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider importing this macro:
[INFO] [stdout]           vg::asset_pack
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Assets` in this scope
[INFO] [stdout]  --> src/assets.rs:134:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | const TEXTURES: Assets = asset_pack!("textures_new.vgpack");
[INFO] [stdout]   |                 ^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 3 | use vg::assets::Assets;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `decode_png` in this scope
[INFO] [stdout]  --> src/assets.rs:135:13
[INFO] [stdout]   |
[INFO] [stdout] 5 | let image = decode_png(TEXTURES.assets("x512")?.binary()?)?;
[INFO] [stdout]   |             ^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`)
[INFO] [stdout]  --> src/assets.rs:135:24
[INFO] [stdout]   |
[INFO] [stdout] 3 |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_assets_rs_133_0() {
[INFO] [stdout]   |  ______________________________________-
[INFO] [stdout] 4 | | const TEXTURES: Assets = asset_pack!("textures_new.vgpack");
[INFO] [stdout] 5 | | let image = decode_png(TEXTURES.assets("x512")?.binary()?)?;
[INFO] [stdout]   | |                        ^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 6 | | // do whatever with your image :)
[INFO] [stdout] 7 | | }; _doctest_main_src_assets_rs_133_0() }
[INFO] [stdout]   | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Try` is not implemented for `()`
[INFO] [stdout]   = note: required by `from_error`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`)
[INFO] [stdout]  --> src/assets.rs:135:24
[INFO] [stdout]   |
[INFO] [stdout] 3 |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_assets_rs_133_0() {
[INFO] [stdout]   |  ______________________________________-
[INFO] [stdout] 4 | | const TEXTURES: Assets = asset_pack!("textures_new.vgpack");
[INFO] [stdout] 5 | | let image = decode_png(TEXTURES.assets("x512")?.binary()?)?;
[INFO] [stdout]   | |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 6 | | // do whatever with your image :)
[INFO] [stdout] 7 | | }; _doctest_main_src_assets_rs_133_0() }
[INFO] [stdout]   | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Try` is not implemented for `()`
[INFO] [stdout]   = note: required by `from_error`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`)
[INFO] [stdout]  --> src/assets.rs:135:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_assets_rs_133_0() {
[INFO] [stdout]   |  ______________________________________-
[INFO] [stdout] 4 | | const TEXTURES: Assets = asset_pack!("textures_new.vgpack");
[INFO] [stdout] 5 | | let image = decode_png(TEXTURES.assets("x512")?.binary()?)?;
[INFO] [stdout]   | |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 6 | | // do whatever with your image :)
[INFO] [stdout] 7 | | }; _doctest_main_src_assets_rs_133_0() }
[INFO] [stdout]   | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Try` is not implemented for `()`
[INFO] [stdout]   = note: required by `from_error`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0412, E0425.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/assets.rs - assets (line 15)
[INFO] [stdout]     src/assets.rs - assets (line 6)
[INFO] [stdout]     src/assets.rs - assets::Assets (line 133)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.71s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "dd93f29de7a88a863d6d52bcf5dff444c24311e30be2b69e39ac40a8537745b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd93f29de7a88a863d6d52bcf5dff444c24311e30be2b69e39ac40a8537745b3", kill_on_drop: false }`
[INFO] [stdout] dd93f29de7a88a863d6d52bcf5dff444c24311e30be2b69e39ac40a8537745b3