[INFO] fetching crate enclave 0.1.4...
[INFO] documenting enclave-0.1.4 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate enclave 0.1.4 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate enclave 0.1.4 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 enclave 0.1.4
[INFO] finished tweaking crates.io crate enclave 0.1.4
[INFO] tweaked toml for crates.io crate enclave 0.1.4 written to /workspace/builds/worker-9/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] aa0523075411124210c67f7e57854829d0e66cf915abc9b2246e573b9a09cfae
[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" "aa0523075411124210c67f7e57854829d0e66cf915abc9b2246e573b9a09cfae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa0523075411124210c67f7e57854829d0e66cf915abc9b2246e573b9a09cfae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa0523075411124210c67f7e57854829d0e66cf915abc9b2246e573b9a09cfae", kill_on_drop: false }`
[INFO] [stdout] aa0523075411124210c67f7e57854829d0e66cf915abc9b2246e573b9a09cfae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stdout] 8330472712aa954ab0f58f7e5ed7bfc2d819c0eb96456054f1c1dda8943dc467
[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" "8330472712aa954ab0f58f7e5ed7bfc2d819c0eb96456054f1c1dda8943dc467", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]     Checking bitflags v0.5.0
[INFO] [stderr]     Checking spin v0.4.10
[INFO] [stderr]     Checking rlibc v1.0.0
[INFO] [stderr]    Compiling enclave v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking sgx-isa v0.1.2
[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/spin-0.4.10/src/lib.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "const_fn", feature(const_fn))]
[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 `spin`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> build.rs:31:3
[INFO] [stdout]    |
[INFO] [stdout] 31 |           (
[INFO] [stdout]    |  _________^
[INFO] [stdout] 32 | |             target2=="target" &&
[INFO] [stdout] 33 | |             package=="package" &&
[INFO] [stdout] 34 | |             target=="target" &&
[INFO] [stdout] ...  |
[INFO] [stdout] 38 | |             out=="out"
[INFO] [stdout] 39 | |         )
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 31 |         
[INFO] [stdout] 32 |             target2=="target" &&
[INFO] [stdout] 33 |             package=="package" &&
[INFO] [stdout] 34 |             target=="target" &&
[INFO] [stdout] 35 |             profile==&env_profile[..] &&
[INFO] [stdout] 36 |             build=="build" &&
[INFO] [stdout]  ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'gcc::compile_library': crate has been renamed to `cc`, the `gcc` name is not maintained
[INFO] [stdout]   --> build.rs:93:2
[INFO] [stdout]    |
[INFO] [stdout] 93 |     gcc::compile_library("libaes.a", &["src/aes/asm_impl.S"]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'gcc::Config': gcc::Config has been renamed to gcc::Build
[INFO] [stdout]   --> build.rs:95:16
[INFO] [stdout]    |
[INFO] [stdout] 95 |     let mut entry=gcc::Config::new();
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'gcc::Build::new': crate has been renamed to `cc`, the `gcc` name is not maintained
[INFO] [stdout]   --> build.rs:95:16
[INFO] [stdout]    |
[INFO] [stdout] 95 |     let mut entry=gcc::Config::new();
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8330472712aa954ab0f58f7e5ed7bfc2d819c0eb96456054f1c1dda8943dc467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8330472712aa954ab0f58f7e5ed7bfc2d819c0eb96456054f1c1dda8943dc467", kill_on_drop: false }`
[INFO] [stdout] 8330472712aa954ab0f58f7e5ed7bfc2d819c0eb96456054f1c1dda8943dc467