[INFO] fetching crate tuifw-screen-ncurses 0.26.0...
[INFO] testing tuifw-screen-ncurses-0.26.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate tuifw-screen-ncurses 0.26.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate tuifw-screen-ncurses 0.26.0
[INFO] finished tweaking crates.io crate tuifw-screen-ncurses 0.26.0
[INFO] tweaked toml for crates.io crate tuifw-screen-ncurses 0.26.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tuifw-screen-ncurses 0.26.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "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" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 47 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.13.0 (available: v0.14.0)
[INFO] [stderr]       Adding panicking v0.5.0 (available: v0.7.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 135a11a29cc24ce87f1908e698548cc2c76cc87d5d2ea4995f31f0ea41291bc7
[INFO] running `Command { std: "docker" "start" "-a" "135a11a29cc24ce87f1908e698548cc2c76cc87d5d2ea4995f31f0ea41291bc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "135a11a29cc24ce87f1908e698548cc2c76cc87d5d2ea4995f31f0ea41291bc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "135a11a29cc24ce87f1908e698548cc2c76cc87d5d2ea4995f31f0ea41291bc7", kill_on_drop: false }`
[INFO] [stdout] 135a11a29cc24ce87f1908e698548cc2c76cc87d5d2ea4995f31f0ea41291bc7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8e5541521fb4d711a514df6edcfa8886b8ffc72b2492512e4cb53d3cec65356c
[INFO] running `Command { std: "docker" "start" "-a" "8e5541521fb4d711a514df6edcfa8886b8ffc72b2492512e4cb53d3cec65356c", kill_on_drop: false }`
[INFO] [stderr]    Compiling find-msvc-tools v0.1.9
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]    Compiling litrs v1.0.0
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling hashbrown v0.17.0
[INFO] [stderr]    Compiling equivalent v1.0.2
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling toml_datetime v0.6.11
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling panicking v0.7.0
[INFO] [stderr]    Compiling macro-attr-2018 v3.0.1
[INFO] [stderr]    Compiling pkg-config v0.3.33
[INFO] [stderr]    Compiling unicode-width v0.2.2
[INFO] [stderr]    Compiling const-default v1.0.0
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling cc v1.2.61
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling document-features v0.2.12
[INFO] [stderr]    Compiling indexmap v2.14.0
[INFO] [stderr]    Compiling enum-derive-2018 v3.0.2
[INFO] [stderr]    Compiling panicking v0.5.0
[INFO] [stderr]    Compiling sync-no-std v0.1.5
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/sync-no-std-0.1.5/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sync-no-std` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "8e5541521fb4d711a514df6edcfa8886b8ffc72b2492512e4cb53d3cec65356c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e5541521fb4d711a514df6edcfa8886b8ffc72b2492512e4cb53d3cec65356c", kill_on_drop: false }`
[INFO] [stdout] 8e5541521fb4d711a514df6edcfa8886b8ffc72b2492512e4cb53d3cec65356c
