[INFO] fetching crate switcheroo 0.2.9...
[INFO] testing switcheroo-0.2.9 against 1.59.0 for beta-1.60-1
[INFO] extracting crate switcheroo 0.2.9 into /workspace/builds/worker-18/source
[INFO] validating manifest of crates.io crate switcheroo 0.2.9 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] started tweaking crates.io crate switcheroo 0.2.9
[INFO] finished tweaking crates.io crate switcheroo 0.2.9
[INFO] tweaked toml for crates.io crate switcheroo 0.2.9 written to /workspace/builds/worker-18/source/Cargo.toml
[INFO] crate crates.io crate switcheroo 0.2.9 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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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] 71f27eb960506f733a661ae795dd45972b745b14724b49430282608480d49d2a
[INFO] running `Command { std: "docker" "start" "-a" "71f27eb960506f733a661ae795dd45972b745b14724b49430282608480d49d2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71f27eb960506f733a661ae795dd45972b745b14724b49430282608480d49d2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71f27eb960506f733a661ae795dd45972b745b14724b49430282608480d49d2a", kill_on_drop: false }`
[INFO] [stdout] 71f27eb960506f733a661ae795dd45972b745b14724b49430282608480d49d2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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] 53a54273a5539cd1f1aad26c6de9ebe3ae011e9fef63713e8baf98f122e3a189
[INFO] running `Command { std: "docker" "start" "-a" "53a54273a5539cd1f1aad26c6de9ebe3ae011e9fef63713e8baf98f122e3a189", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling switcheroo v0.2.9 (/opt/rustwide/workdir)
[INFO] [stdout] error: cannot find macro `asm` in this scope
[INFO] [stdout]   --> src/arch/unix_x64.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         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: cannot find macro `asm` in this scope
[INFO] [stdout]   --> src/arch/unix_x64.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     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: cannot find macro `asm` in this scope
[INFO] [stdout]    --> src/arch/unix_x64.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 107 |     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/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(asm, naked_functions)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: naked functions must contain a single asm block
[INFO] [stdout]   --> src/arch/unix_x64.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     unsafe extern "C" fn trampoline() {
[INFO] [stdout] 21 | |         asm!(
[INFO] [stdout] 22 | |             // Stops unwinding/backtracing at this function.
[INFO] [stdout] 23 | |             ".cfi_undefined rip",
[INFO] [stdout] ...  |
[INFO] [stdout] 26 | |         )
[INFO] [stdout] 27 | |     }
[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: aborting due to 4 previous errors; 1 warning 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 `switcheroo` due to 5 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "53a54273a5539cd1f1aad26c6de9ebe3ae011e9fef63713e8baf98f122e3a189", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53a54273a5539cd1f1aad26c6de9ebe3ae011e9fef63713e8baf98f122e3a189", kill_on_drop: false }`
[INFO] [stdout] 53a54273a5539cd1f1aad26c6de9ebe3ae011e9fef63713e8baf98f122e3a189