[INFO] fetching crate dcap-provider 0.3.1...
[INFO] documenting dcap-provider-0.3.1 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate dcap-provider 0.3.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate dcap-provider 0.3.1 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dcap-provider 0.3.1
[INFO] finished tweaking crates.io crate dcap-provider 0.3.1
[INFO] tweaked toml for crates.io crate dcap-provider 0.3.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20dddf56b68defa8f172997ec5edecb023c2d3c62f0c5d5d5f0b42a70f6d9e0d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "20dddf56b68defa8f172997ec5edecb023c2d3c62f0c5d5d5f0b42a70f6d9e0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20dddf56b68defa8f172997ec5edecb023c2d3c62f0c5d5d5f0b42a70f6d9e0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20dddf56b68defa8f172997ec5edecb023c2d3c62f0c5d5d5f0b42a70f6d9e0d", kill_on_drop: false }`
[INFO] [stdout] 20dddf56b68defa8f172997ec5edecb023c2d3c62f0c5d5d5f0b42a70f6d9e0d
[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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] 1069c24484dbf1b9368fe73addc1554fac8e2d6dc532c1118cf2097a59c5687f
[INFO] running `Command { std: "docker" "start" "-a" "1069c24484dbf1b9368fe73addc1554fac8e2d6dc532c1118cf2097a59c5687f", kill_on_drop: false }`
[INFO] [stderr]    Compiling nix v0.13.1
[INFO] [stderr]    Compiling dcap-ql-sys v0.2.0
[INFO] [stderr]     Checking fortanix-sgx-abi v0.3.3
[INFO] [stderr]     Checking sgx-isa v0.3.2
[INFO] [stderr]     Checking libloading v0.5.2
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking sgxs v0.7.2
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr]     Checking sgxs-loaders v0.2.2
[INFO] [stderr]     Checking dcap-ql v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking enclave-runner v0.4.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/enclave-runner-0.4.1/src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(llvm_asm)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `enclave-runner`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "1069c24484dbf1b9368fe73addc1554fac8e2d6dc532c1118cf2097a59c5687f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1069c24484dbf1b9368fe73addc1554fac8e2d6dc532c1118cf2097a59c5687f", kill_on_drop: false }`
[INFO] [stdout] 1069c24484dbf1b9368fe73addc1554fac8e2d6dc532c1118cf2097a59c5687f