[INFO] fetching crate vex-rt 0.10.1...
[INFO] testing vex-rt-0.10.1 against 1.60.0 for beta-1.61-1
[INFO] extracting crate vex-rt 0.10.1 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate vex-rt 0.10.1 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-28/source/.cargo/config
[INFO] removed /workspace/builds/worker-28/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-28/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" "+1.60.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spin v0.9.1
[INFO] [stderr]   Downloaded by_address v1.0.4
[INFO] [stderr]   Downloaded owner-monad v0.1.0
[INFO] [stderr]   Downloaded zip-extensions v0.6.0
[INFO] [stderr]   Downloaded libc-print v0.1.16
[INFO] [stderr]   Downloaded rcstring v0.2.1
[INFO] [stderr]   Downloaded clang-sys v1.1.1
[INFO] [stderr]   Downloaded raii-map v0.1.0
[INFO] [stderr]   Downloaded safe-modular-arithmetic v0.2.4
[INFO] [stderr]   Downloaded queue-model v0.1.2
[INFO] [stderr]   Downloaded cstring-interop v0.1.0
[INFO] [stderr]   Downloaded newlib-alloc v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e13109f180245d4bcdd475ebb6a62cf2618dcc5157a3147d5afa22204a1e9137
[INFO] running `Command { std: "docker" "start" "-a" "e13109f180245d4bcdd475ebb6a62cf2618dcc5157a3147d5afa22204a1e9137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e13109f180245d4bcdd475ebb6a62cf2618dcc5157a3147d5afa22204a1e9137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e13109f180245d4bcdd475ebb6a62cf2618dcc5157a3147d5afa22204a1e9137", kill_on_drop: false }`
[INFO] [stdout] e13109f180245d4bcdd475ebb6a62cf2618dcc5157a3147d5afa22204a1e9137
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b43a8f23fbfcacc1bb15097a64ccda4a52bb496625badf8fd3e62bf1498668d2
[INFO] running `Command { std: "docker" "start" "-a" "b43a8f23fbfcacc1bb15097a64ccda4a52bb496625badf8fd3e62bf1498668d2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling syn v1.0.65
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling bindgen v0.58.1
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[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 libloading v0.7.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling miniz_oxide v0.3.7
[INFO] [stderr]    Compiling raii-map v0.1.0
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling spin v0.9.1
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling bzip2-sys v0.1.10+1.0.8
[INFO] [stderr]    Compiling clang-sys v1.1.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling libc-print v0.1.16
[INFO] [stderr]    Compiling cstring-interop v0.1.0
[INFO] [stderr]    Compiling newlib-alloc v0.1.0
[INFO] [stderr]    Compiling safe-modular-arithmetic v0.2.4
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling env_logger v0.8.3
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling queue-model v0.1.2
[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" "b43a8f23fbfcacc1bb15097a64ccda4a52bb496625badf8fd3e62bf1498668d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b43a8f23fbfcacc1bb15097a64ccda4a52bb496625badf8fd3e62bf1498668d2", kill_on_drop: false }`
[INFO] [stdout] b43a8f23fbfcacc1bb15097a64ccda4a52bb496625badf8fd3e62bf1498668d2