[INFO] crate runtime 0.3.0-alpha.5 is already in cache
[INFO] extracting crate runtime 0.3.0-alpha.5 into work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/reg/runtime/0.3.0-alpha.5
[INFO] extracting crate runtime 0.3.0-alpha.5 into work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/reg/runtime/0.3.0-alpha.5
[INFO] validating manifest of runtime-0.3.0-alpha.5 on toolchain master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of runtime-0.3.0-alpha.5 on toolchain try#18481b65f318e0b4b20c0fc61340054701719d6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing runtime-0.3.0-alpha.5
[INFO] finished frobbing runtime-0.3.0-alpha.5
[INFO] frobbed toml for runtime-0.3.0-alpha.5 written to work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/reg/runtime/0.3.0-alpha.5/Cargo.toml
[INFO] started frobbing runtime-0.3.0-alpha.5
[INFO] finished frobbing runtime-0.3.0-alpha.5
[INFO] frobbed toml for runtime-0.3.0-alpha.5 written to work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/reg/runtime/0.3.0-alpha.5/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking runtime-0.3.0-alpha.5 against try#18481b65f318e0b4b20c0fc61340054701719d6c for pr-62507
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62507/worker-7/try#18481b65f318e0b4b20c0fc61340054701719d6c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/reg/runtime/0.3.0-alpha.5:/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=forbid" "-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" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c4c657ed7e6ff7aff9ef1547578179b24482dbcf271e81f4b6187bca94b151b2
[INFO] running `"docker" "start" "-a" "c4c657ed7e6ff7aff9ef1547578179b24482dbcf271e81f4b6187bca94b151b2"`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking async-ready v3.0.0
[INFO] [stderr]     Checking async-datagram v3.0.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.8
[INFO] [stderr]    Compiling runtime-attributes v0.3.0-alpha.5
[INFO] [stderr]     Checking crossbeam v0.6.0
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking juliex v0.3.0-alpha.7
[INFO] [stderr]     Checking futures-timer v0.2.1
[INFO] [stderr]     Checking romio v0.3.0-alpha.9
[INFO] [stderr]     Checking runtime-raw v0.3.0-alpha.4
[INFO] [stderr]     Checking runtime-tokio v0.3.0-alpha.5
[INFO] [stderr]     Checking runtime-native v0.3.0-alpha.5
[INFO] [stderr]     Checking runtime v0.3.0-alpha.5 (/opt/crater/workdir)
[INFO] [stderr] error[E0658]: async closures are unstable
[INFO] [stderr]   --> examples/tcp-echo.rs:19:40
[INFO] [stderr]    |
[INFO] [stderr] 19 |         .try_for_each_concurrent(None, async move |stream| {
[INFO] [stderr]    |                                        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/62290
[INFO] [stderr]    = help: add #![feature(async_closure)] to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `runtime`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused `runtime::task::JoinHandle` that must be used
[INFO] [stderr]   --> benches/common/mod.rs:92:17
[INFO] [stderr]    |
[INFO] [stderr] 92 |                 task.await;
[INFO] [stderr]    |                 ^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: benches/native.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     benchmark_suite!(runtime_native::Native);
[INFO] [stderr]    |     ----------------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: futures do nothing unless you `.await` or poll them
[INFO] [stderr] 
[INFO] [stderr] warning: unused `runtime::task::JoinHandle` that must be used
[INFO] [stderr]   --> benches/common/mod.rs:92:17
[INFO] [stderr]    |
[INFO] [stderr] 92 |                 task.await;
[INFO] [stderr]    |                 ^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: benches/tokio.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     benchmark_suite!(runtime_tokio::Tokio);
[INFO] [stderr]    |     --------------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: futures do nothing unless you `.await` or poll them
[INFO] [stderr] 
[INFO] [stderr] warning: unused `runtime::task::JoinHandle` that must be used
[INFO] [stderr]   --> benches/common/mod.rs:92:17
[INFO] [stderr]    |
[INFO] [stderr] 92 |                 task.await;
[INFO] [stderr]    |                 ^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: benches/tokio.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     benchmark_suite!(runtime_tokio::TokioCurrentThread);
[INFO] [stderr]    |     ---------------------------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: futures do nothing unless you `.await` or poll them
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: async closures are unstable
[INFO] [stderr]   --> examples/tcp-proxy.rs:17:40
[INFO] [stderr]    |
[INFO] [stderr] 17 |         .try_for_each_concurrent(None, async move |client| {
[INFO] [stderr]    |                                        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/62290
[INFO] [stderr]    = help: add #![feature(async_closure)] to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `runtime`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c4c657ed7e6ff7aff9ef1547578179b24482dbcf271e81f4b6187bca94b151b2"`
[INFO] running `"docker" "rm" "-f" "c4c657ed7e6ff7aff9ef1547578179b24482dbcf271e81f4b6187bca94b151b2"`
[INFO] [stdout] c4c657ed7e6ff7aff9ef1547578179b24482dbcf271e81f4b6187bca94b151b2