[INFO] fetching crate futures-test-sink 0.1.1...
[INFO] checking futures-test-sink-0.1.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate futures-test-sink 0.1.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate futures-test-sink 0.1.1
[INFO] finished tweaking crates.io crate futures-test-sink 0.1.1
[INFO] tweaked toml for crates.io crate futures-test-sink 0.1.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate futures-test-sink 0.1.1 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 22 packages to latest compatible versions
[INFO] [stderr]       Adding async-task v1.3.1 (available: v4.7.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 13a5361efdbf4c3c7a0033a348772f396b9201c45fcb9a3fc5dff179c09789cd
[INFO] running `Command { std: "docker" "start" "-a" "13a5361efdbf4c3c7a0033a348772f396b9201c45fcb9a3fc5dff179c09789cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13a5361efdbf4c3c7a0033a348772f396b9201c45fcb9a3fc5dff179c09789cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13a5361efdbf4c3c7a0033a348772f396b9201c45fcb9a3fc5dff179c09789cd", kill_on_drop: false }`
[INFO] [stdout] 13a5361efdbf4c3c7a0033a348772f396b9201c45fcb9a3fc5dff179c09789cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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 -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70712d898f800042accd20f36a71c9d0819c80a69fcd3c94f0f35a11b8e76d79
[INFO] running `Command { std: "docker" "start" "-a" "70712d898f800042accd20f36a71c9d0819c80a69fcd3c94f0f35a11b8e76d79", kill_on_drop: false }`
[INFO] [stderr]     Checking async-task v1.3.1
[INFO] [stderr]     Checking futures-test-sink v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:270:26
[INFO] [stdout]     |
[INFO] [stdout] 270 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]     = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures-test-sink` (lib test) due to 14 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:270:26
[INFO] [stdout]     |
[INFO] [stdout] 270 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:270:31
[INFO] [stdout]     |
[INFO] [stdout] 270 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:270:53
[INFO] [stdout]     |
[INFO] [stdout] 270 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                                                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:270:60
[INFO] [stdout]     |
[INFO] [stdout] 270 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                                                            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:270:67
[INFO] [stdout]     |
[INFO] [stdout] 270 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                                                                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:270:75
[INFO] [stdout]     |
[INFO] [stdout] 270 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                                                                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:283:26
[INFO] [stdout]     |
[INFO] [stdout] 283 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:283:26
[INFO] [stdout]     |
[INFO] [stdout] 283 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:283:31
[INFO] [stdout]     |
[INFO] [stdout] 283 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:283:53
[INFO] [stdout]     |
[INFO] [stdout] 283 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                                                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:283:60
[INFO] [stdout]     |
[INFO] [stdout] 283 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                                                            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:283:67
[INFO] [stdout]     |
[INFO] [stdout] 283 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                                                                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, Infallible>
[INFO] [stdout]    --> src/mock_sink.rs:283:75
[INFO] [stdout]     |
[INFO] [stdout] 283 |             stream::iter(vec![Ok::<u8, Never>(5u8), Ok(7), Ok(9), Ok(77), Ok(79)].into_iter());
[INFO] [stdout]     |                                                                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "70712d898f800042accd20f36a71c9d0819c80a69fcd3c94f0f35a11b8e76d79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70712d898f800042accd20f36a71c9d0819c80a69fcd3c94f0f35a11b8e76d79", kill_on_drop: false }`
[INFO] [stdout] 70712d898f800042accd20f36a71c9d0819c80a69fcd3c94f0f35a11b8e76d79