[INFO] crate async-codec-util 0.3.3 is already in cache
[INFO] extracting crate async-codec-util 0.3.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/async-codec-util/0.3.3
[INFO] extracting crate async-codec-util 0.3.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/async-codec-util/0.3.3
[INFO] validating manifest of async-codec-util-0.3.3 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of async-codec-util-0.3.3 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing async-codec-util-0.3.3
[INFO] finished frobbing async-codec-util-0.3.3
[INFO] frobbed toml for async-codec-util-0.3.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/async-codec-util/0.3.3/Cargo.toml
[INFO] started frobbing async-codec-util-0.3.3
[INFO] finished frobbing async-codec-util-0.3.3
[INFO] frobbed toml for async-codec-util-0.3.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/async-codec-util/0.3.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing async-codec-util-0.3.3 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/async-codec-util/0.3.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 131e0a30d21d4f1695f11fb5c4a19f57b6f577dd615f420c5a57e02948507d5c
[INFO] running `"docker" "start" "-a" "131e0a30d21d4f1695f11fb5c4a19f57b6f577dd615f420c5a57e02948507d5c"`
[INFO] [stderr]    Compiling futures-core v0.2.1
[INFO] [stderr]    Compiling futures-channel v0.2.1
[INFO] [stderr]    Compiling futures-io v0.2.1
[INFO] [stderr]    Compiling async-codec v0.3.0
[INFO] [stderr]    Compiling atm-io-utils v0.2.5
[INFO] [stderr]    Compiling futures-sink v0.2.1
[INFO] [stderr]    Compiling futures-util v0.2.1
[INFO] [stderr]    Compiling futures-executor v0.2.1
[INFO] [stderr]    Compiling async-codec-util v0.3.3 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/decoder/decode_exact.rs:42:32
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.42s
[INFO] running `"docker" "inspect" "131e0a30d21d4f1695f11fb5c4a19f57b6f577dd615f420c5a57e02948507d5c"`
[INFO] running `"docker" "rm" "-f" "131e0a30d21d4f1695f11fb5c4a19f57b6f577dd615f420c5a57e02948507d5c"`
[INFO] [stdout] 131e0a30d21d4f1695f11fb5c4a19f57b6f577dd615f420c5a57e02948507d5c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/async-codec-util/0.3.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1049d568a890025f7765c557611b13eb7bfbd7c7a81b56c66c0372cd609554c8
[INFO] running `"docker" "start" "-a" "1049d568a890025f7765c557611b13eb7bfbd7c7a81b56c66c0372cd609554c8"`
[INFO] [stderr]    Compiling async-ringbuffer v0.3.1
[INFO] [stderr]    Compiling async-codec-util v0.3.3
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/async-ringbuffer-0.3.1/src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(offset_to)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `offset_to` found for type `*mut u8` in the current scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/async-ringbuffer-0.3.1/src/lib.rs:70:18
[INFO] [stderr]    |
[INFO] [stderr] 70 |                 .offset_to(self.read.offset(self.amount as isize))
[INFO] [stderr]    |                  ^^^^^^^^^ help: there is a method with a similar name: `offset`
[INFO] [stderr]    |
[INFO] [stderr]    = note: try using `<*const T>::as_ref()` to get a reference to the type behind the pointer: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref
[INFO] [stderr]    = note: using `<*const T>::as_ref()` on a pointer which is unaligned or points to invalid or uninitialized memory is undefined behavior
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `offset_to` found for type `*mut u8` in the current scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/async-ringbuffer-0.3.1/src/lib.rs:133:46
[INFO] [stderr]     |
[INFO] [stderr] 133 |             let distance_we = rb.write_ptr().offset_to(end).unwrap() as usize;
[INFO] [stderr]     |                                              ^^^^^^^^^ help: there is a method with a similar name: `offset`
[INFO] [stderr]     |
[INFO] [stderr]     = note: try using `<*const T>::as_ref()` to get a reference to the type behind the pointer: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref
[INFO] [stderr]     = note: using `<*const T>::as_ref()` on a pointer which is unaligned or points to invalid or uninitialized memory is undefined behavior
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `offset_to` found for type `*mut u8` in the current scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/async-ringbuffer-0.3.1/src/lib.rs:225:39
[INFO] [stderr]     |
[INFO] [stderr] 225 |             let distance_re = rb.read.offset_to(end).unwrap() as usize;
[INFO] [stderr]     |                                       ^^^^^^^^^ help: there is a method with a similar name: `offset`
[INFO] [stderr]     |
[INFO] [stderr]     = note: try using `<*const T>::as_ref()` to get a reference to the type behind the pointer: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref
[INFO] [stderr]     = note: using `<*const T>::as_ref()` on a pointer which is unaligned or points to invalid or uninitialized memory is undefined behavior
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 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 `async-ringbuffer`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "1049d568a890025f7765c557611b13eb7bfbd7c7a81b56c66c0372cd609554c8"`
[INFO] running `"docker" "rm" "-f" "1049d568a890025f7765c557611b13eb7bfbd7c7a81b56c66c0372cd609554c8"`
[INFO] [stdout] 1049d568a890025f7765c557611b13eb7bfbd7c7a81b56c66c0372cd609554c8