[INFO] fetching crate futures-async-stream 0.2.5...
[INFO] checking futures-async-stream-0.2.5 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate futures-async-stream 0.2.5 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate futures-async-stream 0.2.5 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-async-stream 0.2.5
[INFO] finished tweaking crates.io crate futures-async-stream 0.2.5
[INFO] tweaked toml for crates.io crate futures-async-stream 0.2.5 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ecb3dee703d606ca292ff270016c224ce72732afa9e7b5006648f33666031344
[INFO] running `Command { std: "docker" "start" "-a" "ecb3dee703d606ca292ff270016c224ce72732afa9e7b5006648f33666031344", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ecb3dee703d606ca292ff270016c224ce72732afa9e7b5006648f33666031344", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecb3dee703d606ca292ff270016c224ce72732afa9e7b5006648f33666031344", kill_on_drop: false }`
[INFO] [stdout] ecb3dee703d606ca292ff270016c224ce72732afa9e7b5006648f33666031344
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e5e81949a81cf10ce959ff01ae26ec703304f97bd9e7861385625149f504efda
[INFO] running `Command { std: "docker" "start" "-a" "e5e81949a81cf10ce959ff01ae26ec703304f97bd9e7861385625149f504efda", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.62
[INFO] [stderr]    Compiling trybuild v1.0.40
[INFO] [stderr]    Compiling rustversion v1.0.4
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking futures-util v0.3.12
[INFO] [stderr]    Compiling pin-project-internal v1.0.5
[INFO] [stderr]    Compiling futures-async-stream-macro v0.2.5
[INFO] [stderr]     Checking pin-project v1.0.5
[INFO] [stderr]     Checking futures-async-stream v0.2.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde v1.0.123
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> tests/stream.rs:293:5
[INFO] [stdout]     |
[INFO] [stdout] 293 |     #[stream]
[INFO] [stdout]     |     ^^^^^^^^^- help: try adding a semicolon: `;`
[INFO] [stdout]     |     |
[INFO] [stdout]     |     expected `()`, found opaque type
[INFO] [stdout]     | 
[INFO] [stdout]    ::: /opt/rustwide/workdir/src/lib.rs:345:44
[INFO] [stdout]     |
[INFO] [stdout] 345 |     pub fn from_generator<G, T>(gen: G) -> impl Stream<Item = T>
[INFO] [stdout]     |                                            --------------------- the found opaque type
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected unit type `()`
[INFO] [stdout]              found opaque type `impl futures_util::stream::Stream`
[INFO] [stdout]     = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures-async-stream`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "e5e81949a81cf10ce959ff01ae26ec703304f97bd9e7861385625149f504efda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5e81949a81cf10ce959ff01ae26ec703304f97bd9e7861385625149f504efda", kill_on_drop: false }`
[INFO] [stdout] e5e81949a81cf10ce959ff01ae26ec703304f97bd9e7861385625149f504efda