[INFO] fetching crate gym-core 0.1.0...
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] crate gym-core 0.1.0 is already in cache
[INFO] checking gym-core-0.1.0 against try#ff47dd48ed0d02534055e0033cf766ce528f8ebc for pr-99447
[INFO] extracting crate gym-core 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate gym-core 0.1.0 on toolchain ff47dd48ed0d02534055e0033cf766ce528f8ebc
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff47dd48ed0d02534055e0033cf766ce528f8ebc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gym-core 0.1.0
[INFO] finished tweaking crates.io crate gym-core 0.1.0
[INFO] tweaked toml for crates.io crate gym-core 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff47dd48ed0d02534055e0033cf766ce528f8ebc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff47dd48ed0d02534055e0033cf766ce528f8ebc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+ff47dd48ed0d02534055e0033cf766ce528f8ebc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2b8b2fd549c2978212f70dd2533d84edd90d4301810b2e359e7f3d3f4e9d16a8
[INFO] running `Command { std: "docker" "start" "-a" "2b8b2fd549c2978212f70dd2533d84edd90d4301810b2e359e7f3d3f4e9d16a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b8b2fd549c2978212f70dd2533d84edd90d4301810b2e359e7f3d3f4e9d16a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b8b2fd549c2978212f70dd2533d84edd90d4301810b2e359e7f3d3f4e9d16a8", kill_on_drop: false }`
[INFO] [stdout] 2b8b2fd549c2978212f70dd2533d84edd90d4301810b2e359e7f3d3f4e9d16a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+ff47dd48ed0d02534055e0033cf766ce528f8ebc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 344f50f890784e9ac22063d0aa4c96361e8f923f782004d8ef561e09e6121ec4
[INFO] running `Command { std: "docker" "start" "-a" "344f50f890784e9ac22063d0aa4c96361e8f923f782004d8ef561e09e6121ec4", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.129
[INFO] [stderr]    Compiling libm v0.2.4
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling anyhow v1.0.60
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stdout] error: unexpected token: crate
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ndarray-0.15.6/src/slice.rs:845:44
[INFO] [stdout]     |
[INFO] [stdout] 845 |     (@parse ::core::marker::PhantomData::<$crate::Ix0>, ::core::marker::PhantomData::<$crate::Ix0>, []) => {
[INFO] [stdout]     |                                            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] note: `$$`, `$crate`, and meta-variable expressions are not allowed inside macro parameter definitions
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ndarray-0.15.6/src/slice.rs:845:44
[INFO] [stdout]     |
[INFO] [stdout] 845 |     (@parse ::core::marker::PhantomData::<$crate::Ix0>, ::core::marker::PhantomData::<$crate::Ix0>, []) => {
[INFO] [stdout]     |                                            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected token: crate
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ndarray-0.15.6/src/slice.rs:845:88
[INFO] [stdout]     |
[INFO] [stdout] 845 |     (@parse ::core::marker::PhantomData::<$crate::Ix0>, ::core::marker::PhantomData::<$crate::Ix0>, []) => {
[INFO] [stdout]     |                                                                                        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] note: `$$`, `$crate`, and meta-variable expressions are not allowed inside macro parameter definitions
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ndarray-0.15.6/src/slice.rs:845:88
[INFO] [stdout]     |
[INFO] [stdout] 845 |     (@parse ::core::marker::PhantomData::<$crate::Ix0>, ::core::marker::PhantomData::<$crate::Ix0>, []) => {
[INFO] [stdout]     |                                                                                        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ndarray` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "344f50f890784e9ac22063d0aa4c96361e8f923f782004d8ef561e09e6121ec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "344f50f890784e9ac22063d0aa4c96361e8f923f782004d8ef561e09e6121ec4", kill_on_drop: false }`
[INFO] [stdout] 344f50f890784e9ac22063d0aa4c96361e8f923f782004d8ef561e09e6121ec4