[INFO] cloning repository https://github.com/aisamanra/xargo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aisamanra/xargo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faisamanra%2Fxargo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faisamanra%2Fxargo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b67abf8c1ad5e129618117715a10acf8aacadf6d
[INFO] checking aisamanra/xargo against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faisamanra%2Fxargo" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aisamanra/xargo on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/aisamanra/xargo
[INFO] finished tweaking git repo https://github.com/aisamanra/xargo
[INFO] tweaked toml for git repo https://github.com/aisamanra/xargo written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/aisamanra/xargo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 10efbdd0a6ea2d1cc49338cc1a3a2219f0f1d7b5f3afbdb26c5bd0c0654028ac
[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" "10efbdd0a6ea2d1cc49338cc1a3a2219f0f1d7b5f3afbdb26c5bd0c0654028ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10efbdd0a6ea2d1cc49338cc1a3a2219f0f1d7b5f3afbdb26c5bd0c0654028ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10efbdd0a6ea2d1cc49338cc1a3a2219f0f1d7b5f3afbdb26c5bd0c0654028ac", kill_on_drop: false }`
[INFO] [stdout] 10efbdd0a6ea2d1cc49338cc1a3a2219f0f1d7b5f3afbdb26c5bd0c0654028ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 569a9f9393f5ef36f8fabf7148f8288de416d61f9619ad830076798508b9342b
[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" "569a9f9393f5ef36f8fabf7148f8288de416d61f9619ad830076798508b9342b", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.18
[INFO] [stderr]    Compiling gcc v0.3.41
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking rustc-demangle v0.1.3
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]    Compiling xargo v0.3.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]     Checking serde v0.8.21
[INFO] [stderr]     Checking semver v0.1.20
[INFO] [stderr]     Checking smallvec v0.1.8
[INFO] [stderr]     Checking rustc-serialize v0.3.22
[INFO] [stderr]     Checking walkdir v1.0.3
[INFO] [stderr]     Checking owning_ref v0.2.2
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]     Checking kernel32-sys v0.2.2
[INFO] [stderr]     Checking rustc_version v0.1.7
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking fs2 v0.4.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.5
[INFO] [stderr]     Checking error-chain v0.7.2
[INFO] [stderr]     Checking parking_lot_core v0.2.0
[INFO] [stderr]     Checking tempdir v0.3.5
[INFO] [stdout] error: the legacy LLVM-style asm! syntax is no longer supported
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/parking_lot_core-0.2.0/src/spinwait.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |             asm!("pause" ::: "memory" : "volatile");
[INFO] [stdout]    |             ----^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: replace with: `llvm_asm!`
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider migrating to the new asm! syntax specified in RFC 2873
[INFO] [stdout]    = note: alternatively, switch to llvm_asm! to keep your code working as it is
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/parking_lot_core-0.2.0/src/lib.rs:40:34
[INFO] [stdout]    |
[INFO] [stdout] 40 | #![cfg_attr(feature = "nightly", feature(const_fn))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/parking_lot_core-0.2.0/src/lib.rs:41:34
[INFO] [stdout]    |
[INFO] [stdout] 41 | #![cfg_attr(feature = "nightly", feature(integer_atomics))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/parking_lot_core-0.2.0/src/lib.rs:42:34
[INFO] [stdout]    |
[INFO] [stdout] 42 | #![cfg_attr(feature = "nightly", feature(asm))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `parking_lot_core`
[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 `Command { std: "docker" "inspect" "569a9f9393f5ef36f8fabf7148f8288de416d61f9619ad830076798508b9342b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "569a9f9393f5ef36f8fabf7148f8288de416d61f9619ad830076798508b9342b", kill_on_drop: false }`
[INFO] [stdout] 569a9f9393f5ef36f8fabf7148f8288de416d61f9619ad830076798508b9342b