[INFO] fetching crate zub 0.3.14...
[INFO] testing zub-0.3.14 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate zub 0.3.14 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate zub 0.3.14
[INFO] finished tweaking crates.io crate zub 0.3.14
[INFO] tweaked toml for crates.io crate zub 0.3.14 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate zub 0.3.14 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate zub 0.3.14 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 500ec831df3ed02c0151b5859c6dcb542fab2354b789a89a8654eba1055160a3
[INFO] running `Command { std: "docker" "start" "-a" "500ec831df3ed02c0151b5859c6dcb542fab2354b789a89a8654eba1055160a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "500ec831df3ed02c0151b5859c6dcb542fab2354b789a89a8654eba1055160a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "500ec831df3ed02c0151b5859c6dcb542fab2354b789a89a8654eba1055160a3", kill_on_drop: false }`
[INFO] [stdout] 500ec831df3ed02c0151b5859c6dcb542fab2354b789a89a8654eba1055160a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40b8fefc14def4c3ef56368beda1017fb4efe6eed0261eb15149e921db6cdd37
[INFO] running `Command { std: "docker" "start" "-a" "40b8fefc14def4c3ef56368beda1017fb4efe6eed0261eb15149e921db6cdd37", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling ahash v0.3.3
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling im-rc v14.3.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling bitmaps v2.1.0
[INFO] [stderr]    Compiling sized-chunks v0.5.3
[INFO] [stderr]    Compiling serde_json v1.0.52
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling flame v0.2.2
[INFO] [stderr]    Compiling flamer v0.3.0
[INFO] [stderr]    Compiling zub v0.3.14 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(vec_drain_as_slice)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[macro_use] extern crate flamer;
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tag::*`
[INFO] [stdout]  --> src/vm/value/object.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::super::gc::{ *, tag::*, trace::* };
[INFO] [stdout]   |                            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::compiler::CompileState`
[INFO] [stdout]   --> src/vm/vm.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use super::compiler::CompileState;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Trace` and `Tracer`
[INFO] [stdout]  --> src/vm/disassembler.rs:2:18
[INFO] [stdout]   |
[INFO] [stdout] 2 | use gc::trace::{ Trace, Tracer };
[INFO] [stdout]   |                  ^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `vec_drain_as_slice` has been stable since 1.46.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(vec_drain_as_slice)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[macro_use]` attribute cannot be used on use statements
[INFO] [stdout]   --> src/vm/mod.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[macro_use]
[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 a future release!
[INFO] [stdout]    = help: `#[macro_use]` can be applied to modules, extern crates, and crates
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `Nil` is named the same as one of the variants of the type `vm::value::value::Variant`
[INFO] [stdout]    --> src/vm/vm.rs:572:13
[INFO] [stdout]     |
[INFO] [stdout] 572 |             Nil => HashVariant::Nil,
[INFO] [stdout]     |             ^^^ help: to match on the variant, qualify the path: `vm::value::value::Variant::Nil`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bindings_with_variant_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Nil`
[INFO] [stdout]    --> src/vm/vm.rs:572:13
[INFO] [stdout]     |
[INFO] [stdout] 572 |             Nil => HashVariant::Nil,
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 572 |             _Nil => HashVariant::Nil,
[INFO] [stdout]     |             +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named variant `Nil`
[INFO] [stdout]     |
[INFO] [stdout] 572 |             vm::value::value::Variant::Nil => HashVariant::Nil,
[INFO] [stdout]     |             +++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/compiler/compiler.rs:663:13
[INFO] [stdout]     |
[INFO] [stdout] 663 |             _ => panic!("not a constant")
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/compiler/compiler.rs:663:13
[INFO] [stdout]     |
[INFO] [stdout] 651 |             Nil     => self.emit(Op::Nil),
[INFO] [stdout]     |             --- matches some of the same values
[INFO] [stdout] 652 |             Boolean(b) => self.emit(if b { Op::True} else { Op::False } ),
[INFO] [stdout]     |             ---------- matches some of the same values
[INFO] [stdout] 653 |             Number(n) => self.emit_number_literal(n),
[INFO] [stdout]     |             --------- matches some of the same values
[INFO] [stdout] 654 |             String(ref s) => {
[INFO] [stdout]     |             ------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 663 |             _ => panic!("not a constant")
[INFO] [stdout]     |             ^ collectively making this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0170, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0170`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zub` (lib) due to 1 previous error; 9 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "40b8fefc14def4c3ef56368beda1017fb4efe6eed0261eb15149e921db6cdd37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40b8fefc14def4c3ef56368beda1017fb4efe6eed0261eb15149e921db6cdd37", kill_on_drop: false }`
[INFO] [stdout] 40b8fefc14def4c3ef56368beda1017fb4efe6eed0261eb15149e921db6cdd37
