[INFO] fetching crate aljabar 1.0.2...
[INFO] testing aljabar-1.0.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate aljabar 1.0.2 into /workspace/builds/worker-16/source
[INFO] validating manifest of crates.io crate aljabar 1.0.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate aljabar 1.0.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate aljabar 1.0.2
[INFO] tweaked toml for crates.io crate aljabar 1.0.2 written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0561b3d53fe040cf9ca54f0791ce0ab239171ea8ee8f7881dc2cf40abd3d284c
[INFO] running `Command { std: "docker" "start" "-a" "0561b3d53fe040cf9ca54f0791ce0ab239171ea8ee8f7881dc2cf40abd3d284c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0561b3d53fe040cf9ca54f0791ce0ab239171ea8ee8f7881dc2cf40abd3d284c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0561b3d53fe040cf9ca54f0791ce0ab239171ea8ee8f7881dc2cf40abd3d284c", kill_on_drop: false }`
[INFO] [stdout] 0561b3d53fe040cf9ca54f0791ce0ab239171ea8ee8f7881dc2cf40abd3d284c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03eb309ffcdb7278992f55c444d47764e0093b80d5197a0266b48638c9fba919
[INFO] running `Command { std: "docker" "start" "-a" "03eb309ffcdb7278992f55c444d47764e0093b80d5197a0266b48638c9fba919", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]    Compiling paste v0.1.18
[INFO] [stderr]    Compiling aljabar v1.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:173:1
[INFO] [stdout]     |
[INFO] [stdout] 173 | #![feature(const_evaluatable_checked)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:174:1
[INFO] [stdout]     |
[INFO] [stdout] 174 | #![feature(const_generics)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:175:1
[INFO] [stdout]     |
[INFO] [stdout] 175 | #![feature(trivial_bounds)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:176:1
[INFO] [stdout]     |
[INFO] [stdout] 176 | #![feature(maybe_uninit_ref)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:177:1
[INFO] [stdout]     |
[INFO] [stdout] 177 | #![feature(maybe_uninit_uninit_array)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unconstrained generic constant
[INFO] [stdout]    --> src/vector.rs:173:30
[INFO] [stdout]     |
[INFO] [stdout] 173 |     pub fn truncate(self) -> (TruncatedVector<T, { N }>, T) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: try adding a `where` bound using this expression: `where [(); { N - 1 }]:`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unconstrained generic constant
[INFO] [stdout]    --> src/vector.rs:201:36
[INFO] [stdout]     |
[INFO] [stdout] 201 |     pub fn extend(self, new: T) -> ExtendedVector<T, { N }> {
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: try adding a `where` bound using this expression: `where [(); { N + 1 }]:`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aljabar` due to 8 previous errors
[INFO] running `Command { std: "docker" "inspect" "03eb309ffcdb7278992f55c444d47764e0093b80d5197a0266b48638c9fba919", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03eb309ffcdb7278992f55c444d47764e0093b80d5197a0266b48638c9fba919", kill_on_drop: false }`
[INFO] [stdout] 03eb309ffcdb7278992f55c444d47764e0093b80d5197a0266b48638c9fba919