[INFO] fetching crate cursed 0.0.1...
[INFO] testing cursed-0.0.1 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate cursed 0.0.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate cursed 0.0.1
[INFO] finished tweaking crates.io crate cursed 0.0.1
[INFO] tweaked toml for crates.io crate cursed 0.0.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cursed 0.0.1 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "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" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 30 packages to highest compatible versions
[INFO] [stderr]       Adding cfg-if v0.1.10 (available: v1.0.5)
[INFO] [stderr]       Adding parking_lot v0.9.0 (available: v0.12.5)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "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/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] f241dd23abe44d5bf572b6b77ef54ce9346e2f8cca2bd0081dbcf0cc8c68b2a4
[INFO] running `Command { std: "docker" "start" "f241dd23abe44d5bf572b6b77ef54ce9346e2f8cca2bd0081dbcf0cc8c68b2a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f241dd23abe44d5bf572b6b77ef54ce9346e2f8cca2bd0081dbcf0cc8c68b2a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f241dd23abe44d5bf572b6b77ef54ce9346e2f8cca2bd0081dbcf0cc8c68b2a4" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f241dd23abe44d5bf572b6b77ef54ce9346e2f8cca2bd0081dbcf0cc8c68b2a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f241dd23abe44d5bf572b6b77ef54ce9346e2f8cca2bd0081dbcf0cc8c68b2a4" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling libc v0.2.191
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling log v0.4.34
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling cursed v0.0.1 (/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(const_type_id)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `const_type_id` has been stable since 1.91.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_type_id)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exception`
[INFO] [stdout]    --> src/vec.rs:285:69
[INFO] [stdout]     |
[INFO] [stdout] 266 |   macro_rules! vec_constructor {
[INFO] [stdout] ...
[INFO] [stdout] 285 |           pub extern "C" fn vec_free(handle: *mut RawVec, ty: TypeId, exception: *mut Exception) {
[INFO] [stdout]     |                                                                       ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 322 | / vec_constructor! {
[INFO] [stdout] 323 | |     TYPE_STRING => String,
[INFO] [stdout] 324 | |     TYPE_U64 => u64
[INFO] [stdout] 325 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout] help: `exception` is captured in macro and introduced a unused variable
[INFO] [stdout]    --> src/vec.rs:285:69
[INFO] [stdout]     |
[INFO] [stdout] 285 |           pub extern "C" fn vec_free(handle: *mut RawVec, ty: TypeId, exception: *mut Exception) {
[INFO] [stdout]     |                                                                       ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 322 | / vec_constructor! {
[INFO] [stdout] 323 | |     TYPE_STRING => String,
[INFO] [stdout] 324 | |     TYPE_U64 => u64
[INFO] [stdout] 325 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cursed` (lib) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "f241dd23abe44d5bf572b6b77ef54ce9346e2f8cca2bd0081dbcf0cc8c68b2a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f241dd23abe44d5bf572b6b77ef54ce9346e2f8cca2bd0081dbcf0cc8c68b2a4", kill_on_drop: false }`
[INFO] [stdout] f241dd23abe44d5bf572b6b77ef54ce9346e2f8cca2bd0081dbcf0cc8c68b2a4
