[INFO] crate enclave-runner 0.4.0 is already in cache
[INFO] testing enclave-runner-0.4.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate enclave-runner 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate enclave-runner 0.4.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate enclave-runner 0.4.0
[INFO] finished tweaking crates.io crate enclave-runner 0.4.0
[INFO] tweaked toml for crates.io crate enclave-runner 0.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0ae98bc83496408d822b3bbb650ba6612b2775f8ca8e6d05653ea4f709db99f3
[INFO] running `"docker" "start" "-a" "0ae98bc83496408d822b3bbb650ba6612b2775f8ca8e6d05653ea4f709db99f3"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling nix v0.13.1
[INFO] [stderr]    Compiling arc-swap v0.4.6
[INFO] [stderr]    Compiling fortanix-sgx-abi v0.3.3
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling sgx-isa v0.3.2
[INFO] [stderr]    Compiling crossbeam v0.7.3
[INFO] [stderr]    Compiling signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling sgxs v0.7.2
[INFO] [stderr]    Compiling tokio v0.2.21
[INFO] [stderr]    Compiling futures-executor v0.3.5
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling enclave-runner v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(llvm_asm)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `enclave-runner`.
[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] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0ae98bc83496408d822b3bbb650ba6612b2775f8ca8e6d05653ea4f709db99f3"`
[INFO] running `"docker" "rm" "-f" "0ae98bc83496408d822b3bbb650ba6612b2775f8ca8e6d05653ea4f709db99f3"`
[INFO] [stdout] 0ae98bc83496408d822b3bbb650ba6612b2775f8ca8e6d05653ea4f709db99f3