[INFO] crate futures-util-preview 0.3.0-alpha.19 is already in cache
[INFO] testing futures-util-preview-0.3.0-alpha.19 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] extracting crate futures-util-preview 0.3.0-alpha.19 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate futures-util-preview 0.3.0-alpha.19 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate futures-util-preview 0.3.0-alpha.19
[INFO] finished tweaking crates.io crate futures-util-preview 0.3.0-alpha.19
[INFO] tweaked toml for crates.io crate futures-util-preview 0.3.0-alpha.19 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 313e81dedbea14c79c1155c78c5c822a591e6539c54b6bd45c7038be600f2dc1
[INFO] running `"docker" "start" "-a" "313e81dedbea14c79c1155c78c5c822a591e6539c54b6bd45c7038be600f2dc1"`
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.19 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.22s
[INFO] running `"docker" "inspect" "313e81dedbea14c79c1155c78c5c822a591e6539c54b6bd45c7038be600f2dc1"`
[INFO] running `"docker" "rm" "-f" "313e81dedbea14c79c1155c78c5c822a591e6539c54b6bd45c7038be600f2dc1"`
[INFO] [stdout] 313e81dedbea14c79c1155c78c5c822a591e6539c54b6bd45c7038be600f2dc1
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 18ec68112bf963a0186da844ef79ddf86a951da11f87bbc87c8ca73e2522d02e
[INFO] running `"docker" "start" "-a" "18ec68112bf963a0186da844ef79ddf86a951da11f87bbc87c8ca73e2522d02e"`
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.19 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures_test`
[INFO] [stderr]   --> src/try_future/try_chain.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |     use futures_test::task::noop_context;
[INFO] [stderr]    |         ^^^^^^^^^^^^ use of undeclared type or module `futures_test`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `noop_context` in this scope
[INFO] [stderr]   --> src/try_future/try_chain.rs:93:22
[INFO] [stderr]    |
[INFO] [stderr] 93 |         let mut cx = noop_context();
[INFO] [stderr]    |                      ^^^^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: could not compile `futures-util-preview`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "18ec68112bf963a0186da844ef79ddf86a951da11f87bbc87c8ca73e2522d02e"`
[INFO] running `"docker" "rm" "-f" "18ec68112bf963a0186da844ef79ddf86a951da11f87bbc87c8ca73e2522d02e"`
[INFO] [stdout] 18ec68112bf963a0186da844ef79ddf86a951da11f87bbc87c8ca73e2522d02e