[INFO] updating cached repository https://github.com/drone-os/demo-core-nucleo
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 97ba61d694292d2111e1ab5b0cc15d65b84303b6
[INFO] testing drone-os/demo-core-nucleo against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrone-os%2Fdemo-core-nucleo" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/drone-os/demo-core-nucleo on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/drone-os/demo-core-nucleo
[INFO] finished tweaking git repo https://github.com/drone-os/demo-core-nucleo
[INFO] tweaked toml for git repo https://github.com/drone-os/demo-core-nucleo written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/drone-os/demo-core-nucleo already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 27aca0df1f1e12297761fbd1d8433cc3435f77bd1a35d6814e32a9232bae70d6
[INFO] running `"docker" "start" "-a" "27aca0df1f1e12297761fbd1d8433cc3435f77bd1a35d6814e32a9232bae70d6"`
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling if_chain v1.0.0
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling drone-ctypes v0.9.0 (https://github.com/drone-os/drone-core#4884f143)
[INFO] [stderr]    Compiling regex-syntax v0.6.10
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling backtrace v0.3.33
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling regex v1.2.0
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling drone-macros-core v0.9.0 (https://github.com/drone-os/drone-core#4884f143)
[INFO] [stderr]    Compiling serde_derive v1.0.97
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling drone-core-macros v0.9.0 (https://github.com/drone-os/drone-core#4884f143)
[INFO] [stderr]    Compiling drone-cortex-m-macros v0.9.0 (https://github.com/drone-os/drone-cortex-m#497b638a)
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling serde v1.0.97
[INFO] [stderr]    Compiling drone-core v0.9.0 (https://github.com/drone-os/drone-core#4884f143)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:25:1
[INFO] [stderr]    |
[INFO] [stderr] 25 | #![feature(allocator_api)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | #![feature(associated_type_defaults)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | #![feature(const_fn)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | #![feature(core_intrinsics)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | #![feature(exhaustive_patterns)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:30:1
[INFO] [stderr]    |
[INFO] [stderr] 30 | #![feature(generator_trait)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | #![feature(generators)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | #![feature(marker_trait_attr)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:33:1
[INFO] [stderr]    |
[INFO] [stderr] 33 | #![feature(maybe_uninit_extra)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | #![feature(maybe_uninit_ref)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | #![feature(never_type)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | #![feature(optin_builtin_traits)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | #![feature(prelude_import)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | #![feature(raw_vec_internals)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:39:1
[INFO] [stderr]    |
[INFO] [stderr] 39 | #![feature(result_map_or_else)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:40:1
[INFO] [stderr]    |
[INFO] [stderr] 40 | #![feature(slice_internals)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | #![feature(todo_macro)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/lib.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | #![feature(untagged_unions)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cap` found for type `alloc::raw_vec::RawVec<T>` in the current scope
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/sync/spsc/ring.rs:87:70
[INFO] [stderr]    |
[INFO] [stderr] 87 |         let end = begin.wrapping_add(count).wrapping_rem(self.buffer.cap());
[INFO] [stderr]    |                                                                      ^^^ private field, not a method
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cap` found for type `alloc::raw_vec::RawVec<T>` in the current scope
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/sync/spsc/ring.rs:92:33
[INFO] [stderr]    |
[INFO] [stderr] 92 |                     self.buffer.cap(),
[INFO] [stderr]    |                                 ^^^ private field, not a method
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cap` found for type `alloc::raw_vec::RawVec<T>` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/sync/spsc/ring.rs:105:33
[INFO] [stderr]     |
[INFO] [stderr] 105 |                     self.buffer.cap() - begin,
[INFO] [stderr]     |                                 ^^^ private field, not a method
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cap` found for type `alloc::raw_vec::RawVec<T>` in the current scope
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/sync/spsc/ring/receiver.rs:68:66
[INFO] [stderr]    |
[INFO] [stderr] 68 |         *state |= begin.wrapping_add(1).wrapping_rem(self.buffer.cap());
[INFO] [stderr]    |                                                                  ^^^ private field, not a method
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cap` found for type `alloc::raw_vec::RawVec<T>` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/sync/spsc/ring/sender.rs:130:37
[INFO] [stderr]     |
[INFO] [stderr] 130 |             if count == self.buffer.cap() {
[INFO] [stderr]     |                                     ^^^ private field, not a method
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cap` found for type `alloc::raw_vec::RawVec<T>` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/sync/spsc/ring/sender.rs:168:33
[INFO] [stderr]     |
[INFO] [stderr] 168 |         if count == self.buffer.cap() {
[INFO] [stderr]     |                                 ^^^ private field, not a method
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cap` found for type `alloc::raw_vec::RawVec<T>` in the current scope
[INFO] [stderr]    --> /opt/rustwide/cargo-home/git/checkouts/drone-core-01900c20b9bf9e2a/4884f14/src/sync/spsc/ring/sender.rs:177:60
[INFO] [stderr]     |
[INFO] [stderr] 177 |         begin.wrapping_add(count).wrapping_rem(self.buffer.cap())
[INFO] [stderr]     |                                                            ^^^ private field, not a method
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 25 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `drone-core`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "27aca0df1f1e12297761fbd1d8433cc3435f77bd1a35d6814e32a9232bae70d6"`
[INFO] running `"docker" "rm" "-f" "27aca0df1f1e12297761fbd1d8433cc3435f77bd1a35d6814e32a9232bae70d6"`
[INFO] [stdout] 27aca0df1f1e12297761fbd1d8433cc3435f77bd1a35d6814e32a9232bae70d6