[INFO] fetching crate const-buffer 0.1.2... [INFO] testing const-buffer-0.1.2 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0 [INFO] extracting crate const-buffer 0.1.2 into /workspace/builds/worker-6-tc1/source [INFO] started tweaking crates.io crate const-buffer 0.1.2 [INFO] finished tweaking crates.io crate const-buffer 0.1.2 [INFO] tweaked toml for crates.io crate const-buffer 0.1.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate const-buffer 0.1.2 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 1258466f438d99e2cea729625d5207dda5a67fdb78079e497fab9eb39a13620a [INFO] running `Command { std: "docker" "start" "-a" "1258466f438d99e2cea729625d5207dda5a67fdb78079e497fab9eb39a13620a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1258466f438d99e2cea729625d5207dda5a67fdb78079e497fab9eb39a13620a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1258466f438d99e2cea729625d5207dda5a67fdb78079e497fab9eb39a13620a", kill_on_drop: false }` [INFO] [stdout] 1258466f438d99e2cea729625d5207dda5a67fdb78079e497fab9eb39a13620a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] e10c0e419dd20806c13e8fa38a6fe8080e96cac978fcf2199c747cbd196f476a [INFO] running `Command { std: "docker" "start" "-a" "e10c0e419dd20806c13e8fa38a6fe8080e96cac978fcf2199c747cbd196f476a", kill_on_drop: false }` [INFO] [stderr] Compiling const-buffer v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] error[E0557]: feature has been removed [INFO] [stdout] --> src/lib.rs:70:5 [INFO] [stdout] | [INFO] [stdout] 70 | untagged_unions [INFO] [stdout] | ^^^^^^^^^^^^^^^ feature has been removed [INFO] [stdout] | [INFO] [stdout] = note: removed in 1.64.0 (you are using 1.89.0-nightly (8de4c7234 2025-06-19)); see for more information [INFO] [stdout] = note: unions with `Copy` and `ManuallyDrop` fields are stable; there is no intent to stabilize more [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `associated_type_bounds` has been stable since 1.79.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/lib.rs:63:5 [INFO] [stdout] | [INFO] [stdout] 63 | associated_type_bounds, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(stable_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `const_fn_union` has been stable since 1.56.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/lib.rs:64:5 [INFO] [stdout] | [INFO] [stdout] 64 | const_fn_union, [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `min_const_generics` has been stable since 1.51.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/lib.rs:65:5 [INFO] [stdout] | [INFO] [stdout] 65 | min_const_generics, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `const_mut_refs` has been stable since 1.83.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/lib.rs:66:5 [INFO] [stdout] | [INFO] [stdout] 66 | const_mut_refs, [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `maybe_uninit_extra` has been stable since 1.60.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/lib.rs:67:5 [INFO] [stdout] | [INFO] [stdout] 67 | maybe_uninit_extra, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `maybe_uninit_ref` has been stable since 1.55.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/lib.rs:68:5 [INFO] [stdout] | [INFO] [stdout] 68 | maybe_uninit_ref, [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union [INFO] [stdout] --> src/lib.rs:112:13 [INFO] [stdout] | [INFO] [stdout] 112 | maybe_uninit: MaybeUninit<[T; N]>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>` [INFO] [stdout] help: wrap the field type in `ManuallyDrop<...>` [INFO] [stdout] | [INFO] [stdout] 112 | maybe_uninit: std::mem::ManuallyDrop>, [INFO] [stdout] | +++++++++++++++++++++++ + [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `core::mem::MaybeUninit::::slice_assume_init_ref`: replaced by inherent assume_init_ref method; will eventually be removed [INFO] [stdout] --> src/lib.rs:928:22 [INFO] [stdout] | [INFO] [stdout] 928 | MaybeUninit::slice_assume_init_ref(self) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `core::mem::MaybeUninit::::slice_assume_init_mut`: replaced by inherent assume_init_mut method; will eventually be removed [INFO] [stdout] --> src/lib.rs:932:22 [INFO] [stdout] | [INFO] [stdout] 932 | MaybeUninit::slice_assume_init_mut(self) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0557, E0740. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0557`. [INFO] [stdout] [INFO] [stderr] error: could not compile `const-buffer` (lib) due to 2 previous errors; 8 warnings emitted [INFO] running `Command { std: "docker" "inspect" "e10c0e419dd20806c13e8fa38a6fe8080e96cac978fcf2199c747cbd196f476a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e10c0e419dd20806c13e8fa38a6fe8080e96cac978fcf2199c747cbd196f476a", kill_on_drop: false }` [INFO] [stdout] e10c0e419dd20806c13e8fa38a6fe8080e96cac978fcf2199c747cbd196f476a