[INFO] updating cached repository https://github.com/NikosEfthias/rust-lessons-code
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/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] 85e333d4fe442602b75f5ef9df5c9d0634970e9c
[INFO] checking NikosEfthias/rust-lessons-code against try#00e4530a79c42b21a6ca2ac1edb597c90d21f89f for pr-64672
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FNikosEfthias%2Frust-lessons-code" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NikosEfthias/rust-lessons-code on toolchain 00e4530a79c42b21a6ca2ac1edb597c90d21f89f
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/NikosEfthias/rust-lessons-code
[INFO] finished tweaking git repo https://github.com/NikosEfthias/rust-lessons-code
[INFO] tweaked toml for git repo https://github.com/NikosEfthias/rust-lessons-code written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/NikosEfthias/rust-lessons-code already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/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=forbid" "-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" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 616bbabd302db225fc747ae16b2d513dada3ffb416fc8a1fe2716d1c3bd888e2
[INFO] running `"docker" "start" "-a" "616bbabd302db225fc747ae16b2d513dada3ffb416fc8a1fe2716d1c3bd888e2"`
[INFO] [stderr]    Compiling curl v0.4.22
[INFO] [stderr]    Compiling chttp v0.4.5
[INFO] [stderr]     Checking futures-core-preview v0.2.3
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.1
[INFO] [stderr]    Compiling curl-sys v0.4.20
[INFO] [stderr]     Checking libz-sys v1.0.25
[INFO] [stderr]    Compiling withers_derive v0.2.0
[INFO] [stderr]     Checking crossbeam v0.7.1
[INFO] [stderr]     Checking futures-channel-preview v0.2.2
[INFO] [stderr]     Checking futures-io-preview v0.2.2
[INFO] [stderr]     Checking futures-sink-preview v0.2.2
[INFO] [stderr]     Checking futures-util-preview v0.2.2
[INFO] [stderr]     Checking futures-executor-preview v0.2.2
[INFO] [stderr]     Checking futures-stable-preview v0.2.3
[INFO] [stderr]     Checking futures-async-runtime-preview v0.2.3
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/futures-async-runtime-preview-0.2.3/src/future.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 | impl<T> !Unpin for GenStableFuture<T> { }
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/13231
[INFO] [stderr]    = help: add `#![feature(optin_builtin_traits)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/futures-async-runtime-preview-0.2.3/src/stream.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 | impl<U, T> !Unpin for GenStableStream<U, T> { }
[INFO] [stderr]    |            ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/13231
[INFO] [stderr]    = help: add `#![feature(optin_builtin_traits)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `futures-async-runtime-preview`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "616bbabd302db225fc747ae16b2d513dada3ffb416fc8a1fe2716d1c3bd888e2"`
[INFO] running `"docker" "rm" "-f" "616bbabd302db225fc747ae16b2d513dada3ffb416fc8a1fe2716d1c3bd888e2"`
[INFO] [stdout] 616bbabd302db225fc747ae16b2d513dada3ffb416fc8a1fe2716d1c3bd888e2