[INFO] fetching crate gfx_64 0.1.0...
[INFO] testing gfx_64-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate gfx_64 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate gfx_64 0.1.0
[INFO] finished tweaking crates.io crate gfx_64 0.1.0
[INFO] tweaked toml for crates.io crate gfx_64 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate gfx_64 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 25 packages to latest compatible versions
[INFO] [stderr]       Adding bindgen v0.60.1 (available: v0.72.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clang-sys v1.8.1
[INFO] [stderr]   Downloaded cexpr v0.6.0
[INFO] [stderr]   Downloaded math_64 v0.1.0
[INFO] [stderr]   Downloaded mem_64 v0.1.0
[INFO] [stderr]   Downloaded log_64 v0.1.1
[INFO] [stderr]   Downloaded bindgen v0.60.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 902c98eb13afca7540a0a7e6c1ea22d392c80e3997b5e39d6570d126452dc39f
[INFO] running `Command { std: "docker" "start" "-a" "902c98eb13afca7540a0a7e6c1ea22d392c80e3997b5e39d6570d126452dc39f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "902c98eb13afca7540a0a7e6c1ea22d392c80e3997b5e39d6570d126452dc39f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "902c98eb13afca7540a0a7e6c1ea22d392c80e3997b5e39d6570d126452dc39f", kill_on_drop: false }`
[INFO] [stdout] 902c98eb13afca7540a0a7e6c1ea22d392c80e3997b5e39d6570d126452dc39f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28a806c8d3cb68899c5ef31e18b4e44a388c16fe1f389277d9b63b9e05318b80
[INFO] running `Command { std: "docker" "start" "-a" "28a806c8d3cb68899c5ef31e18b4e44a388c16fe1f389277d9b63b9e05318b80", kill_on_drop: false }`
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling regex-syntax v0.8.6
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling bindgen v0.60.1
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling mem_64 v0.1.0
[INFO] [stderr]    Compiling log_64 v0.1.1
[INFO] [stderr]    Compiling math_64 v0.1.0
[INFO] [stderr]    Compiling clang-sys v1.8.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/math_64-0.1.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(core_intrinsics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `math_64` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "28a806c8d3cb68899c5ef31e18b4e44a388c16fe1f389277d9b63b9e05318b80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28a806c8d3cb68899c5ef31e18b4e44a388c16fe1f389277d9b63b9e05318b80", kill_on_drop: false }`
[INFO] [stdout] 28a806c8d3cb68899c5ef31e18b4e44a388c16fe1f389277d9b63b9e05318b80