[INFO] fetching crate vex-rt 0.10.1...
[INFO] testing vex-rt-0.10.1 against 1.59.0 for beta-1.60-1
[INFO] extracting crate vex-rt 0.10.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate vex-rt 0.10.1 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-13/source/.cargo/config
[INFO] removed /workspace/builds/worker-13/source/rust-toolchain
[INFO] started tweaking crates.io crate vex-rt 0.10.1
[INFO] finished tweaking crates.io crate vex-rt 0.10.1
[INFO] tweaked toml for crates.io crate vex-rt 0.10.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate vex-rt 0.10.1 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 cstring-interop v0.1.0
[INFO] [stderr]   Downloaded libc-print v0.1.16
[INFO] [stderr]   Downloaded libc v0.2.91
[INFO] [stderr]   Downloaded clang-sys v1.1.1
[INFO] [stderr]   Downloaded syn v1.0.65
[INFO] [stderr]   Downloaded env_logger v0.8.3
[INFO] [stderr]   Downloaded newlib-alloc v0.1.0
[INFO] [stderr]   Downloaded queue-model v0.1.2
[INFO] [stderr]   Downloaded spin v0.9.1
[INFO] [stderr]   Downloaded bzip2-sys v0.1.10+1.0.8
[INFO] [stderr]   Downloaded array-init v2.0.0
[INFO] [stderr]   Downloaded owner-monad v0.1.0
[INFO] [stderr]   Downloaded by_address v1.0.4
[INFO] [stderr]   Downloaded zip v0.5.11
[INFO] [stderr]   Downloaded zip-extensions v0.6.0
[INFO] [stderr]   Downloaded raii-map v0.1.0
[INFO] [stderr]   Downloaded rcstring v0.2.1
[INFO] [stderr]   Downloaded regex v1.4.5
[INFO] [stderr]   Downloaded regex-syntax v0.6.23
[INFO] [stderr]   Downloaded safe-modular-arithmetic v0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] e9938b5eb81fad42507d2cda6e271d6dfb594db10e6ced7aeb9fa9229639a8df
[INFO] running `Command { std: "docker" "start" "-a" "e9938b5eb81fad42507d2cda6e271d6dfb594db10e6ced7aeb9fa9229639a8df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9938b5eb81fad42507d2cda6e271d6dfb594db10e6ced7aeb9fa9229639a8df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9938b5eb81fad42507d2cda6e271d6dfb594db10e6ced7aeb9fa9229639a8df", kill_on_drop: false }`
[INFO] [stdout] e9938b5eb81fad42507d2cda6e271d6dfb594db10e6ced7aeb9fa9229639a8df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] eaa76d9ff1c529212d22f348784185740736a5986224363ff1c8a05d7c672152
[INFO] running `Command { std: "docker" "start" "-a" "eaa76d9ff1c529212d22f348784185740736a5986224363ff1c8a05d7c672152", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling syn v1.0.65
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling bindgen v0.58.1
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling rcstring v0.2.1
[INFO] [stderr]    Compiling owner-monad v0.1.0
[INFO] [stderr]    Compiling by_address v1.0.4
[INFO] [stderr]    Compiling bzip2-sys v0.1.10+1.0.8
[INFO] [stderr]    Compiling clang-sys v1.1.1
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling libloading v0.7.0
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling miniz_oxide v0.3.7
[INFO] [stderr]    Compiling raii-map v0.1.0
[INFO] [stderr]    Compiling spin v0.9.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling cstring-interop v0.1.0
[INFO] [stderr]    Compiling libc-print v0.1.16
[INFO] [stderr]    Compiling newlib-alloc v0.1.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling safe-modular-arithmetic v0.2.4
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling queue-model v0.1.2
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling env_logger v0.8.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling zip v0.5.11
[INFO] [stderr]    Compiling zip-extensions v0.6.0
[INFO] [stderr]    Compiling vex-rt v0.10.1 (/opt/rustwide/workdir)
[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(alloc_error_handler)]
[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:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(negative_impls)]
[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:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(unsafe_cell_raw_get)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `vex-rt` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "eaa76d9ff1c529212d22f348784185740736a5986224363ff1c8a05d7c672152", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eaa76d9ff1c529212d22f348784185740736a5986224363ff1c8a05d7c672152", kill_on_drop: false }`
[INFO] [stdout] eaa76d9ff1c529212d22f348784185740736a5986224363ff1c8a05d7c672152