[INFO] fetching crate wyrcan 2.1.0...
[INFO] testing wyrcan-2.1.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate wyrcan 2.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate wyrcan 2.1.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate wyrcan 2.1.0
[INFO] finished tweaking crates.io crate wyrcan 2.1.0
[INFO] tweaked toml for crates.io crate wyrcan 2.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate wyrcan 2.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tar v0.4.37
[INFO] [stderr]   Downloaded ureq v2.3.1
[INFO] [stderr]   Downloaded cpio v0.2.0
[INFO] [stderr]   Downloaded iocuddle v0.1.1
[INFO] [stderr]   Downloaded webpki-roots v0.22.1
[INFO] [stderr]   Downloaded rustls v0.20.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39caa54869dda49b38d310291b0cd94ff867c9d096165bbd7ed2ef207cfb7f37
[INFO] running `Command { std: "docker" "start" "-a" "39caa54869dda49b38d310291b0cd94ff867c9d096165bbd7ed2ef207cfb7f37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39caa54869dda49b38d310291b0cd94ff867c9d096165bbd7ed2ef207cfb7f37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39caa54869dda49b38d310291b0cd94ff867c9d096165bbd7ed2ef207cfb7f37", kill_on_drop: false }`
[INFO] [stdout] 39caa54869dda49b38d310291b0cd94ff867c9d096165bbd7ed2ef207cfb7f37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b73c6fcd250c7d986b6e5b96eb4ee57271a0d1b3b3447f2bd42febabefdca0a2
[INFO] running `Command { std: "docker" "start" "-a" "b73c6fcd250c7d986b6e5b96eb4ee57271a0d1b3b3447f2bd42febabefdca0a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.7
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling anyhow v1.0.45
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling chunked_transfer v1.4.0
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling iocuddle v0.1.1
[INFO] [stderr]    Compiling cpio v0.2.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling tinyvec v1.5.1
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling filetime v0.2.15
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling flate2 v1.0.22
[INFO] [stderr]    Compiling console v0.15.0
[INFO] [stderr]    Compiling tar v0.4.37
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling indicatif v0.16.2
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling webpki v0.22.0
[INFO] [stderr]    Compiling sct v0.7.0
[INFO] [stderr]    Compiling rustls v0.20.1
[INFO] [stderr]    Compiling webpki-roots v0.22.1
[INFO] [stderr]    Compiling structopt v0.3.25
[INFO] [stderr]    Compiling ureq v2.3.1
[INFO] [stderr]    Compiling wyrcan v2.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: cannot find macro `asm` in this scope
[INFO] [stdout]   --> src/commands/kexec.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |             asm!(
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider importing one of these items:
[INFO] [stdout]            std::arch::asm
[INFO] [stdout]            core::arch::asm
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(asm, if_let_guard)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `wyrcan` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "b73c6fcd250c7d986b6e5b96eb4ee57271a0d1b3b3447f2bd42febabefdca0a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b73c6fcd250c7d986b6e5b96eb4ee57271a0d1b3b3447f2bd42febabefdca0a2", kill_on_drop: false }`
[INFO] [stdout] b73c6fcd250c7d986b6e5b96eb4ee57271a0d1b3b3447f2bd42febabefdca0a2