[INFO] fetching crate frenetic 0.1.0...
[INFO] testing frenetic-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate frenetic 0.1.0 into /workspace/builds/worker-27/source
[INFO] validating manifest of crates.io crate frenetic 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate frenetic 0.1.0
[INFO] finished tweaking crates.io crate frenetic 0.1.0
[INFO] tweaked toml for crates.io crate frenetic 0.1.0 written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02e5e424500065efdfaf752782c19c317de8508c7ec641b9faefe74993369b6f
[INFO] running `Command { std: "docker" "start" "-a" "02e5e424500065efdfaf752782c19c317de8508c7ec641b9faefe74993369b6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02e5e424500065efdfaf752782c19c317de8508c7ec641b9faefe74993369b6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02e5e424500065efdfaf752782c19c317de8508c7ec641b9faefe74993369b6f", kill_on_drop: false }`
[INFO] [stdout] 02e5e424500065efdfaf752782c19c317de8508c7ec641b9faefe74993369b6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f94e2ed14103cc40944e425296beaf2494f4ab98c021d382ed1a7a66543029b4
[INFO] running `Command { std: "docker" "start" "-a" "f94e2ed14103cc40944e425296beaf2494f4ab98c021d382ed1a7a66543029b4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling frenetic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(naked_functions)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(asm)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: referencing function parameters is not allowed in naked functions
[INFO] [stdout]   --> src/arch/x86_64/sysv.rs:47:27
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 in("rdi") self,
[INFO] [stdout]    |                           ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: follow the calling convention in asm block to use parameters
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: only `const` and `sym` operands are supported in naked functions
[INFO] [stdout]   --> src/arch/x86_64/sysv.rs:47:17
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 in("rdi") self,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unsupported_naked_functions)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: referencing function parameters is not allowed in naked functions
[INFO] [stdout]   --> src/arch/x86_64/sysv.rs:66:23
[INFO] [stdout]    |
[INFO] [stdout] 66 |             in("rdi") self,
[INFO] [stdout]    |                       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: follow the calling convention in asm block to use parameters
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: only `const` and `sym` operands are supported in naked functions
[INFO] [stdout]   --> src/arch/x86_64/sysv.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 |             in("rdi") self,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #32408 <https://github.com/rust-lang/rust/issues/32408>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `frenetic` due to 5 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "f94e2ed14103cc40944e425296beaf2494f4ab98c021d382ed1a7a66543029b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f94e2ed14103cc40944e425296beaf2494f4ab98c021d382ed1a7a66543029b4", kill_on_drop: false }`
[INFO] [stdout] f94e2ed14103cc40944e425296beaf2494f4ab98c021d382ed1a7a66543029b4