[INFO] fetching crate diff_fmt 0.1.0...
[INFO] testing diff_fmt-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate diff_fmt 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate diff_fmt 0.1.0
[INFO] finished tweaking crates.io crate diff_fmt 0.1.0
[INFO] tweaked toml for crates.io crate diff_fmt 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate diff_fmt 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] [stderr]       Adding termion v1.5.6 (available: v4.0.5)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded termion v1.5.6
[INFO] [stderr]   Downloaded numtoa v0.1.0
[INFO] [stderr]   Downloaded redox_termios v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9035302f645456fa4b5466e6dca587f6b9f1b5e7603795e950b63d3a6416a0dc
[INFO] running `Command { std: "docker" "start" "-a" "9035302f645456fa4b5466e6dca587f6b9f1b5e7603795e950b63d3a6416a0dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9035302f645456fa4b5466e6dca587f6b9f1b5e7603795e950b63d3a6416a0dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9035302f645456fa4b5466e6dca587f6b9f1b5e7603795e950b63d3a6416a0dc", kill_on_drop: false }`
[INFO] [stdout] 9035302f645456fa4b5466e6dca587f6b9f1b5e7603795e950b63d3a6416a0dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d62fe9e99544282ef906753e68a6a91b264d55fa6e2a183ea80c4edcd23a907e
[INFO] running `Command { std: "docker" "start" "-a" "d62fe9e99544282ef906753e68a6a91b264d55fa6e2a183ea80c4edcd23a907e", kill_on_drop: false }`
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling termion v1.5.6
[INFO] [stderr]    Compiling diff_fmt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: could not find `rt` in `fmt`
[INFO] [stdout]   --> src/lib.rs:38:44
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn clone_args(f: &Formatter) -> [std::fmt::rt::v1::Argument; 1] {
[INFO] [stdout]    |                                            ^^ could not find `rt` in `fmt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:39:23
[INFO] [stdout]    |
[INFO] [stdout] 39 |     [::core::fmt::rt::v1::Argument {
[INFO] [stdout]    |                       ^^ could not find `v1` in `rt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:40:36
[INFO] [stdout]    |
[INFO] [stdout] 40 |         position: ::core::fmt::rt::v1::Position::At(0usize),
[INFO] [stdout]    |                                    ^^ could not find `v1` in `rt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:41:34
[INFO] [stdout]    |
[INFO] [stdout] 41 |         format: ::core::fmt::rt::v1::FormatSpec {
[INFO] [stdout]    |                                  ^^ could not find `v1` in `rt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:53:45
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 Some(p) => ::core::fmt::rt::v1::Count::Is(p),
[INFO] [stdout]    |                                             ^^ could not find `v1` in `rt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:54:42
[INFO] [stdout]    |
[INFO] [stdout] 54 |                 None => ::core::fmt::rt::v1::Count::Implied,
[INFO] [stdout]    |                                          ^^ could not find `v1` in `rt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:57:45
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 Some(w) => ::core::fmt::rt::v1::Count::Is(w),
[INFO] [stdout]    |                                             ^^ could not find `v1` in `rt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:58:42
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 None => ::core::fmt::rt::v1::Count::Implied,
[INFO] [stdout]    |                                          ^^ could not find `v1` in `rt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]   --> src/lib.rs:93:28
[INFO] [stdout]    |
[INFO] [stdout] 93 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]    |                            ^^^^^^^^^^
[INFO] [stdout]    |                            |
[INFO] [stdout]    |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:101:28
[INFO] [stdout]     |
[INFO] [stdout] 101 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:115:28
[INFO] [stdout]     |
[INFO] [stdout] 115 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:123:28
[INFO] [stdout]     |
[INFO] [stdout] 123 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:137:28
[INFO] [stdout]     |
[INFO] [stdout] 137 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:145:28
[INFO] [stdout]     |
[INFO] [stdout] 145 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:159:28
[INFO] [stdout]     |
[INFO] [stdout] 159 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:167:28
[INFO] [stdout]     |
[INFO] [stdout] 167 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:181:28
[INFO] [stdout]     |
[INFO] [stdout] 181 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:189:28
[INFO] [stdout]     |
[INFO] [stdout] 189 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:203:28
[INFO] [stdout]     |
[INFO] [stdout] 203 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:211:28
[INFO] [stdout]     |
[INFO] [stdout] 211 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:225:28
[INFO] [stdout]     |
[INFO] [stdout] 225 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:233:28
[INFO] [stdout]     |
[INFO] [stdout] 233 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:247:28
[INFO] [stdout]     |
[INFO] [stdout] 247 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:255:28
[INFO] [stdout]     |
[INFO] [stdout] 255 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:305:28
[INFO] [stdout]     |
[INFO] [stdout] 305 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:313:28
[INFO] [stdout]     |
[INFO] [stdout] 313 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:327:28
[INFO] [stdout]     |
[INFO] [stdout] 327 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:335:28
[INFO] [stdout]     |
[INFO] [stdout] 335 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:349:28
[INFO] [stdout]     |
[INFO] [stdout] 349 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:357:28
[INFO] [stdout]     |
[INFO] [stdout] 357 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:371:28
[INFO] [stdout]     |
[INFO] [stdout] 371 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:379:28
[INFO] [stdout]     |
[INFO] [stdout] 379 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:393:28
[INFO] [stdout]     |
[INFO] [stdout] 393 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:401:28
[INFO] [stdout]     |
[INFO] [stdout] 401 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:415:28
[INFO] [stdout]     |
[INFO] [stdout] 415 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:423:28
[INFO] [stdout]     |
[INFO] [stdout] 423 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:437:28
[INFO] [stdout]     |
[INFO] [stdout] 437 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:445:28
[INFO] [stdout]     |
[INFO] [stdout] 445 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:459:28
[INFO] [stdout]     |
[INFO] [stdout] 459 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ArgumentV1` in `fmt`
[INFO] [stdout]    --> src/lib.rs:467:28
[INFO] [stdout]     |
[INFO] [stdout] 467 |             &[::core::fmt::ArgumentV1::new(
[INFO] [stdout]     |                            ^^^^^^^^^^
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            could not find `ArgumentV1` in `fmt`
[INFO] [stdout]     |                            help: a struct with a similar name exists: `Arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:45:57
[INFO] [stdout]    |
[INFO] [stdout] 45 |                     Alignment::Left => ::core::fmt::rt::v1::Alignment::Left,
[INFO] [stdout]    |                                                         ^^ could not find `v1` in `rt`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 24 + use std::fmt::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] 24 + use std::ptr::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] 24 + use alloc::fmt::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] help: if you import `Alignment`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 45 -                     Alignment::Left => ::core::fmt::rt::v1::Alignment::Left,
[INFO] [stdout] 45 +                     Alignment::Left => Alignment::Left,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:46:58
[INFO] [stdout]    |
[INFO] [stdout] 46 |                     Alignment::Right => ::core::fmt::rt::v1::Alignment::Right,
[INFO] [stdout]    |                                                          ^^ could not find `v1` in `rt`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 24 + use std::fmt::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] 24 + use std::ptr::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] 24 + use alloc::fmt::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] help: if you import `Alignment`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 46 -                     Alignment::Right => ::core::fmt::rt::v1::Alignment::Right,
[INFO] [stdout] 46 +                     Alignment::Right => Alignment::Right,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:47:59
[INFO] [stdout]    |
[INFO] [stdout] 47 |                     Alignment::Center => ::core::fmt::rt::v1::Alignment::Center,
[INFO] [stdout]    |                                                           ^^ could not find `v1` in `rt`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 24 + use std::fmt::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] 24 + use std::ptr::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] 24 + use alloc::fmt::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] help: if you import `Alignment`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 47 -                     Alignment::Center => ::core::fmt::rt::v1::Alignment::Center,
[INFO] [stdout] 47 +                     Alignment::Center => Alignment::Center,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `v1` in `rt`
[INFO] [stdout]   --> src/lib.rs:49:42
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 None => ::core::fmt::rt::v1::Alignment::Unknown
[INFO] [stdout]    |                                          ^^ could not find `v1` in `rt`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]    |
[INFO] [stdout] 24 + use std::fmt::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] 24 + use std::ptr::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] 24 + use alloc::fmt::Alignment;
[INFO] [stdout]    |
[INFO] [stdout] help: if you import `Alignment`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 49 -                 None => ::core::fmt::rt::v1::Alignment::Unknown
[INFO] [stdout] 49 +                 None => Alignment::Unknown
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:39:19
[INFO] [stdout]    |
[INFO] [stdout] 39 |     [::core::fmt::rt::v1::Argument {
[INFO] [stdout]    |                   ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:40:32
[INFO] [stdout]    |
[INFO] [stdout] 40 |         position: ::core::fmt::rt::v1::Position::At(0usize),
[INFO] [stdout]    |                                ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:41:30
[INFO] [stdout]    |
[INFO] [stdout] 41 |         format: ::core::fmt::rt::v1::FormatSpec {
[INFO] [stdout]    |                              ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:45:53
[INFO] [stdout]    |
[INFO] [stdout] 45 |                     Alignment::Left => ::core::fmt::rt::v1::Alignment::Left,
[INFO] [stdout]    |                                                     ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:46:54
[INFO] [stdout]    |
[INFO] [stdout] 46 |                     Alignment::Right => ::core::fmt::rt::v1::Alignment::Right,
[INFO] [stdout]    |                                                      ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:47:55
[INFO] [stdout]    |
[INFO] [stdout] 47 |                     Alignment::Center => ::core::fmt::rt::v1::Alignment::Center,
[INFO] [stdout]    |                                                       ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:49:38
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 None => ::core::fmt::rt::v1::Alignment::Unknown
[INFO] [stdout]    |                                      ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:53:41
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 Some(p) => ::core::fmt::rt::v1::Count::Is(p),
[INFO] [stdout]    |                                         ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:54:38
[INFO] [stdout]    |
[INFO] [stdout] 54 |                 None => ::core::fmt::rt::v1::Count::Implied,
[INFO] [stdout]    |                                      ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:57:41
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 Some(w) => ::core::fmt::rt::v1::Count::Is(w),
[INFO] [stdout]    |                                         ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:58:38
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 None => ::core::fmt::rt::v1::Count::Implied,
[INFO] [stdout]    |                                      ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:19:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(prelude_import)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(print_internals)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![feature(fmt_internals)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `prelude_import` is internal to the compiler or standard library
[INFO] [stdout]   --> src/lib.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(prelude_import)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: using it is strongly discouraged
[INFO] [stdout]    = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `print_internals` is internal to the compiler or standard library
[INFO] [stdout]   --> src/lib.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(print_internals)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: using it is strongly discouraged
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `fmt_internals` is internal to the compiler or standard library
[INFO] [stdout]   --> src/lib.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![feature(fmt_internals)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: using it is strongly discouraged
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0554, E0603.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `diff_fmt` (lib) due to 58 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d62fe9e99544282ef906753e68a6a91b264d55fa6e2a183ea80c4edcd23a907e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d62fe9e99544282ef906753e68a6a91b264d55fa6e2a183ea80c4edcd23a907e", kill_on_drop: false }`
[INFO] [stdout] d62fe9e99544282ef906753e68a6a91b264d55fa6e2a183ea80c4edcd23a907e
