[INFO] fetching crate polymorph-allocator 1.2.0... [INFO] testing polymorph-allocator-1.2.0 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-2 [INFO] extracting crate polymorph-allocator 1.2.0 into /workspace/builds/worker-3-tc2/source [INFO] started tweaking crates.io crate polymorph-allocator 1.2.0 [INFO] finished tweaking crates.io crate polymorph-allocator 1.2.0 [INFO] tweaked toml for crates.io crate polymorph-allocator 1.2.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate polymorph-allocator 1.2.0 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 2 packages to latest compatible versions [INFO] [stderr] Adding bitflags v1.3.2 (available: v2.11.1) [INFO] [stderr] Adding spin v0.5.2 (available: v0.10.0) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 9328d153e32ef84d14122c6bd609b4db738deff5eb01c7934fe55b18c9e0f64c [INFO] running `Command { std: "docker" "start" "-a" "9328d153e32ef84d14122c6bd609b4db738deff5eb01c7934fe55b18c9e0f64c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "9328d153e32ef84d14122c6bd609b4db738deff5eb01c7934fe55b18c9e0f64c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9328d153e32ef84d14122c6bd609b4db738deff5eb01c7934fe55b18c9e0f64c", kill_on_drop: false }` [INFO] [stdout] 9328d153e32ef84d14122c6bd609b4db738deff5eb01c7934fe55b18c9e0f64c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3ec371a07333f3fa7948dfe05f57b891461d8bb7086bf65c38ee7e828b375033 [INFO] running `Command { std: "docker" "start" "-a" "3ec371a07333f3fa7948dfe05f57b891461d8bb7086bf65c38ee7e828b375033", kill_on_drop: false }` [INFO] [stderr] Compiling polymorph-allocator v1.2.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0557]: feature has been removed [INFO] [stdout] --> src/lib.rs:3:12 [INFO] [stdout] | [INFO] [stdout] 3 | #![feature(const_fn)] [INFO] [stdout] | ^^^^^^^^ feature has been removed [INFO] [stdout] | [INFO] [stdout] = note: removed in 1.54.0; see for more information [INFO] [stdout] = note: split into finer-grained feature gates [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `alloc_layout_extra` has been stable since 1.95.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/lib.rs:5:12 [INFO] [stdout] | [INFO] [stdout] 5 | #![feature(alloc_layout_extra)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(stable_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: use of unstable library feature `ptr_alignment_type` [INFO] [stdout] --> src/lib.rs:277:31 [INFO] [stdout] | [INFO] [stdout] 277 | let size_pad = layout.padding_needed_for(layout.align()) + layout.size(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #102070 for more information [INFO] [stdout] = help: add `#![feature(ptr_alignment_type)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2026-03-22; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/lib.rs:277:50 [INFO] [stdout] | [INFO] [stdout] 277 | let size_pad = layout.padding_needed_for(layout.align()) + layout.size(); [INFO] [stdout] | ------------------ ^^^^^^^^^^^^^^ expected `Alignment`, found `usize` [INFO] [stdout] | | [INFO] [stdout] | arguments to this method are incorrect [INFO] [stdout] | [INFO] [stdout] note: method defined here [INFO] [stdout] --> /rustc/dec9417b8611e34e787a3e4c37686b5131f9e5c5/library/core/src/alloc/layout.rs:335:17 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:205:17 [INFO] [stdout] | [INFO] [stdout] 205 | let mut prev = prev.unwrap(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0308, E0557, E0658. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stderr] error: could not compile `polymorph-allocator` (lib) due to 3 previous errors; 2 warnings emitted [INFO] running `Command { std: "docker" "inspect" "3ec371a07333f3fa7948dfe05f57b891461d8bb7086bf65c38ee7e828b375033", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3ec371a07333f3fa7948dfe05f57b891461d8bb7086bf65c38ee7e828b375033", kill_on_drop: false }` [INFO] [stdout] 3ec371a07333f3fa7948dfe05f57b891461d8bb7086bf65c38ee7e828b375033