[INFO] fetching crate mergui 0.1.0-alpha0.8...
[INFO] testing mergui-0.1.0-alpha0.8 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145330-1
[INFO] extracting crate mergui 0.1.0-alpha0.8 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate mergui 0.1.0-alpha0.8
[INFO] finished tweaking crates.io crate mergui 0.1.0-alpha0.8
[INFO] tweaked toml for crates.io crate mergui 0.1.0-alpha0.8 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mergui 0.1.0-alpha0.8 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mergui 0.1.0-alpha0.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.68
[INFO] [stderr]   Downloaded ordered-float v1.1.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.68
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.68
[INFO] [stderr]   Downloaded cgl v0.3.2
[INFO] [stderr]   Downloaded glutin_emscripten_sys v0.1.1
[INFO] [stderr]   Downloaded pin-project-internal v1.0.2
[INFO] [stderr]   Downloaded glow v0.4.0
[INFO] [stderr]   Downloaded tinyvec v1.1.0
[INFO] [stderr]   Downloaded aho-corasick v0.7.15
[INFO] [stderr]   Downloaded serde v1.0.117
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.68
[INFO] [stderr]   Downloaded ena v0.11.0
[INFO] [stderr]   Downloaded gl_generator v0.13.1
[INFO] [stderr]   Downloaded glutin_gles2_sys v0.1.5
[INFO] [stderr]   Downloaded smallvec v1.5.0
[INFO] [stderr]   Downloaded x11-dl v2.18.5
[INFO] [stderr]   Downloaded glutin_glx_sys v0.1.7
[INFO] [stderr]   Downloaded glutin_egl_sys v0.1.5
[INFO] [stderr]   Downloaded xml-rs v0.8.3
[INFO] [stderr]   Downloaded futures-executor v0.3.8
[INFO] [stderr]   Downloaded regex v1.4.2
[INFO] [stderr]   Downloaded net2 v0.2.36
[INFO] [stderr]   Downloaded hashbrown v0.7.2
[INFO] [stderr]   Downloaded bumpalo v3.4.0
[INFO] [stderr]   Downloaded blinds v0.1.6
[INFO] [stderr]   Downloaded elefont v0.1.3
[INFO] [stderr]   Downloaded html5ever v0.13.1
[INFO] [stderr]   Downloaded serde_json v1.0.59
[INFO] [stderr]   Downloaded getrandom v0.1.15
[INFO] [stderr]   Downloaded string_cache v0.4.0
[INFO] [stderr]   Downloaded syn v1.0.52
[INFO] [stderr]   Downloaded cc v1.0.65
[INFO] [stderr]   Downloaded lalrpop v0.16.3
[INFO] [stderr]   Downloaded libc v0.2.80
[INFO] [stderr]   Downloaded regex-syntax v0.6.21
[INFO] [stderr]   Downloaded serde_derive v1.0.117
[INFO] [stderr]   Downloaded sha1 v0.6.0
[INFO] [stderr]   Downloaded glutin_wgl_sys v0.1.5
[INFO] [stderr]   Downloaded derivative v2.1.1
[INFO] [stderr]   Downloaded toml v0.5.7
[INFO] [stderr]   Downloaded bit-set v0.5.2
[INFO] [stderr]   Downloaded petgraph v0.4.13
[INFO] [stderr]   Downloaded image v0.22.5
[INFO] [stderr]   Downloaded platter v0.1.4
[INFO] [stderr]   Downloaded futures-util v0.3.8
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded osmesa-sys v0.1.2
[INFO] [stderr]   Downloaded glutin v0.24.1
[INFO] [stderr]   Downloaded raw-window-handle v0.3.3
[INFO] [stderr]   Downloaded RustyXML v0.1.1
[INFO] [stderr]   Downloaded debug_unreachable v0.1.1
[INFO] [stderr]   Downloaded futf v0.1.4
[INFO] [stderr]   Downloaded base-x v0.2.8
[INFO] [stderr]   Downloaded gestalt v0.1.0
[INFO] [stderr]   Downloaded unreachable v0.1.1
[INFO] [stderr]   Downloaded string_cache_codegen v0.3.1
[INFO] [stderr]   Downloaded html5ever-atoms v0.2.2
[INFO] [stderr]   Downloaded utf-8 v0.6.0
[INFO] [stderr]   Downloaded html2runes v1.0.1
[INFO] [stderr]   Downloaded ascii-canvas v1.0.0
[INFO] [stderr]   Downloaded docopt v1.1.0
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.68
[INFO] [stderr]   Downloaded tendril v0.2.4
[INFO] [stderr]   Downloaded bit-vec v0.6.2
[INFO] [stderr]   Downloaded strsim v0.9.3
[INFO] [stderr]   Downloaded ordermap v0.3.5
[INFO] [stderr]   Downloaded string_cache_shared v0.3.0
[INFO] [stderr]   Downloaded webidl v0.8.0
[INFO] [stderr]   Downloaded num-iter v0.1.42
[INFO] [stderr]   Downloaded png v0.15.3
[INFO] [stderr]   Downloaded mint v0.5.6
[INFO] [stderr]   Downloaded futures-core v0.3.8
[INFO] [stderr]   Downloaded futures-task v0.3.8
[INFO] [stderr]   Downloaded slotmap v0.3.0
[INFO] [stderr]   Downloaded pin-project v1.0.2
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded hermit-abi v0.1.17
[INFO] [stderr]   Downloaded futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded fixedbitset v0.1.9
[INFO] [stderr]   Downloaded string_cache_codegen v0.4.4
[INFO] [stderr]   Downloaded string_cache v0.7.5
[INFO] [stderr]   Downloaded term v0.4.6
[INFO] [stderr]   Downloaded lalrpop-util v0.16.3
[INFO] [stderr]   Downloaded webgl_generator v0.2.0
[INFO] [stderr]   Downloaded webgl_stdweb v0.3.0
[INFO] [stderr]   Downloaded golem v0.1.7
[INFO] [stderr]   Downloaded crc32fast v1.2.1
[INFO] [stderr]   Downloaded instant v0.1.9
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded quicksilver v0.4.0
[INFO] [stderr]   Downloaded jpeg-decoder v0.1.20
[INFO] [stderr]   Downloaded unicode-normalization v0.1.16
[INFO] [stderr]   Downloaded bytemuck v1.4.1
[INFO] [stderr]   Downloaded libloading v0.6.5
[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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6752fd4c0ed41628e17cc6752373100d45ad0cf9280b086237395594177251f5
[INFO] running `Command { std: "docker" "start" "-a" "6752fd4c0ed41628e17cc6752373100d45ad0cf9280b086237395594177251f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6752fd4c0ed41628e17cc6752373100d45ad0cf9280b086237395594177251f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6752fd4c0ed41628e17cc6752373100d45ad0cf9280b086237395594177251f5", kill_on_drop: false }`
[INFO] [stdout] 6752fd4c0ed41628e17cc6752373100d45ad0cf9280b086237395594177251f5
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b021bc312839c0e8fb5cff74640d7acfef1288d728ba186801d1de6b4532e29
[INFO] running `Command { std: "docker" "start" "-a" "8b021bc312839c0e8fb5cff74640d7acfef1288d728ba186801d1de6b4532e29", kill_on_drop: false }`
[INFO] [stderr]    Compiling xml-rs v0.8.3
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling khronos_api v3.1.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling libloading v0.6.5
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling syn v1.0.52
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling downcast-rs v1.2.0
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling dlib v0.4.2
[INFO] [stderr]    Compiling cc v1.0.65
[INFO] [stderr]    Compiling wayland-sys v0.23.6
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling xdg v2.2.0
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling wayland-scanner v0.23.6
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling gl_generator v0.13.1
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling smallvec v1.5.0
[INFO] [stderr]    Compiling stb_truetype v0.3.1
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]    Compiling futures-task v0.3.8
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling futures-core v0.3.8
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.36
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling parking_lot_core v0.7.2
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling ordered-float v1.1.0
[INFO] [stderr]    Compiling line_drawing v0.7.0
[INFO] [stderr]    Compiling raw-window-handle v0.3.3
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling rusttype v0.8.3
[INFO] [stderr]    Compiling glow v0.4.0
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.5
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.7
[INFO] [stderr]    Compiling parking_lot v0.10.2
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling rusttype v0.7.9
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling andrew v0.2.1
[INFO] [stderr]    Compiling tinyvec v1.1.0
[INFO] [stderr]    Compiling png v0.15.3
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling jpeg-decoder v0.1.20
[INFO] [stderr]    Compiling ahash v0.3.8
[INFO] [stderr]    Compiling wayland-client v0.23.6
[INFO] [stderr]    Compiling wayland-protocols v0.23.6
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling mint v0.5.6
[INFO] [stderr]    Compiling bytemuck v1.4.1
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling image v0.22.5
[INFO] [stderr]    Compiling unicode-normalization v0.1.16
[INFO] [stderr]    Compiling elefont v0.1.3
[INFO] [stderr]    Compiling wayland-commons v0.23.6
[INFO] [stderr]    Compiling calloop v0.4.4
[INFO] [stderr]    Compiling golem v0.1.7
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling pin-project v1.0.2
[INFO] [stderr]    Compiling futures-util v0.3.8
[INFO] [stderr]    Compiling futures-executor v0.3.8
[INFO] [stderr]    Compiling platter v0.1.4
[INFO] [stderr]    Compiling smithay-client-toolkit v0.6.6
[INFO] [stderr]    Compiling winit v0.22.2
[INFO] [stderr]    Compiling glutin v0.24.1
[INFO] [stderr]    Compiling blinds v0.1.6
[INFO] [stderr]    Compiling quicksilver v0.4.0
[INFO] [stderr]    Compiling mergui v0.1.0-alpha0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> src/widgets/dropdown.rs:148:5
[INFO] [stdout]     |
[INFO] [stdout] 148 |     fn render(&mut self, gfx: &mut Graphics, _: &Window) -> Result<()> {
[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 Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromIterator<()>` will fail
[INFO] [stdout]    --> src/widgets/dropdown.rs:207:28
[INFO] [stdout]     |
[INFO] [stdout] 207 |                 .collect::<Result<_>>()?;
[INFO] [stdout]     |                            ^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(dependency_on_unit_never_type_fallback)]` on by default
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 207 -                 .collect::<Result<_>>()?;
[INFO] [stdout] 207 +                 .collect::<Result<()>>()?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 33.03s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: mergui v0.1.0-alpha0.8 (/opt/rustwide/workdir)
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "8b021bc312839c0e8fb5cff74640d7acfef1288d728ba186801d1de6b4532e29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b021bc312839c0e8fb5cff74640d7acfef1288d728ba186801d1de6b4532e29", kill_on_drop: false }`
[INFO] [stdout] 8b021bc312839c0e8fb5cff74640d7acfef1288d728ba186801d1de6b4532e29
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5db45fb89114df8d921559d769c5d0eae76f80c6bbc83d343cafc13bc5b1b532
[INFO] running `Command { std: "docker" "start" "-a" "5db45fb89114df8d921559d769c5d0eae76f80c6bbc83d343cafc13bc5b1b532", kill_on_drop: false }`
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> src/widgets/dropdown.rs:148:5
[INFO] [stdout]     |
[INFO] [stdout] 148 |     fn render(&mut self, gfx: &mut Graphics, _: &Window) -> Result<()> {
[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 Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromIterator<()>` will fail
[INFO] [stdout]    --> src/widgets/dropdown.rs:207:28
[INFO] [stdout]     |
[INFO] [stdout] 207 |                 .collect::<Result<_>>()?;
[INFO] [stdout]     |                            ^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(dependency_on_unit_never_type_fallback)]` on by default
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 207 -                 .collect::<Result<_>>()?;
[INFO] [stdout] 207 +                 .collect::<Result<()>>()?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling mergui v0.1.0-alpha0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> src/widgets/dropdown.rs:148:5
[INFO] [stdout]     |
[INFO] [stdout] 148 |     fn render(&mut self, gfx: &mut Graphics, _: &Window) -> Result<()> {
[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 Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromIterator<()>` will fail
[INFO] [stdout]    --> src/widgets/dropdown.rs:207:28
[INFO] [stdout]     |
[INFO] [stdout] 207 |                 .collect::<Result<_>>()?;
[INFO] [stdout]     |                            ^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(dependency_on_unit_never_type_fallback)]` on by default
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 207 -                 .collect::<Result<_>>()?;
[INFO] [stdout] 207 +                 .collect::<Result<()>>()?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 4.07s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: mergui v0.1.0-alpha0.8 (/opt/rustwide/workdir)
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "5db45fb89114df8d921559d769c5d0eae76f80c6bbc83d343cafc13bc5b1b532", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5db45fb89114df8d921559d769c5d0eae76f80c6bbc83d343cafc13bc5b1b532", kill_on_drop: false }`
[INFO] [stdout] 5db45fb89114df8d921559d769c5d0eae76f80c6bbc83d343cafc13bc5b1b532
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cd47b712295b07bf9e7fd2d9fd524bfb8a75c2fa67ca53e0b4b273890bbffc0a
[INFO] running `Command { std: "docker" "start" "-a" "cd47b712295b07bf9e7fd2d9fd524bfb8a75c2fa67ca53e0b4b273890bbffc0a", kill_on_drop: false }`
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stdout] 
[INFO] [stderr]    --> src/widgets/dropdown.rs:148:5
[INFO] [stdout] running 0 tests
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr] 148 |     fn render(&mut self, gfx: &mut Graphics, _: &Window) -> Result<()> {
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]     = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromIterator<()>` will fail
[INFO] [stderr]    --> src/widgets/dropdown.rs:207:28
[INFO] [stderr]     |
[INFO] [stderr] 207 |                 .collect::<Result<_>>()?;
[INFO] [stderr]     |                            ^^^^^^^^^
[INFO] [stderr]     = note: `#[warn(dependency_on_unit_never_type_fallback)]` on by default
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]     |
[INFO] [stderr] 207 -                 .collect::<Result<_>>()?;
[INFO] [stderr] 207 +                 .collect::<Result<()>>()?;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `mergui` (lib) generated 1 warning (run `cargo fix --lib -p mergui` to apply 1 suggestion)
[INFO] [stderr] warning: `mergui` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: mergui v0.1.0-alpha0.8 (/opt/rustwide/workdir)
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mergui-fd3f184ded67ca1e)
[INFO] [stderr]    Doc-tests mergui
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/channels/input.rs - channels::input::InputChannel::insert_char_at_place (line 55) ... ok
[INFO] [stdout] test src/channels/input.rs - channels::input::InputChannel::get (line 15) ... ok
[INFO] [stdout] test src/channels/input.rs - channels::input::InputChannel::remove_char_at (line 77) ... ok
[INFO] [stdout] test src/channels/input.rs - channels::input::InputChannel::chars (line 109) ... ok
[INFO] [stdout] test src/channels/input.rs - channels::input::InputChannel::char_count (line 98) ... ok
[INFO] [stdout] test src/channels/input.rs - channels::input::InputChannel::push (line 40) ... ok
[INFO] [stdout] test src/channels/input.rs - channels::input::InputChannel::set (line 27) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.97s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cd47b712295b07bf9e7fd2d9fd524bfb8a75c2fa67ca53e0b4b273890bbffc0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd47b712295b07bf9e7fd2d9fd524bfb8a75c2fa67ca53e0b4b273890bbffc0a", kill_on_drop: false }`
[INFO] [stdout] cd47b712295b07bf9e7fd2d9fd524bfb8a75c2fa67ca53e0b4b273890bbffc0a