[INFO] fetching crate stream_router 0.2.1...
[INFO] checking stream_router-0.2.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate stream_router 0.2.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate stream_router 0.2.1 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stream_router 0.2.1
[INFO] finished tweaking crates.io crate stream_router 0.2.1
[INFO] tweaked toml for crates.io crate stream_router 0.2.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate stream_router 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-test v0.3.4
[INFO] [stderr]   Downloaded num_stream v0.1.1
[INFO] [stderr]   Downloaded tokio v0.2.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0369fd99b44a9d7ade637c6571872ddd2fd933fa61f8cc3e2781bee2e049de9a
[INFO] running `Command { std: "docker" "start" "-a" "0369fd99b44a9d7ade637c6571872ddd2fd933fa61f8cc3e2781bee2e049de9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0369fd99b44a9d7ade637c6571872ddd2fd933fa61f8cc3e2781bee2e049de9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0369fd99b44a9d7ade637c6571872ddd2fd933fa61f8cc3e2781bee2e049de9a", kill_on_drop: false }`
[INFO] [stdout] 0369fd99b44a9d7ade637c6571872ddd2fd933fa61f8cc3e2781bee2e049de9a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6d51f04cc86be830dc0cc8279c492932019d00e838785005b9a30ba004c7e1f
[INFO] running `Command { std: "docker" "start" "-a" "c6d51f04cc86be830dc0cc8279c492932019d00e838785005b9a30ba004c7e1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling memchr v2.3.3
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[INFO] [stderr]     Checking stream_router v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to an implementation block
[INFO] [stdout]    --> src/lib.rs:361:1
[INFO] [stdout]     |
[INFO] [stdout] 361 | #[must_use = "streams do nothing unless you `.await` or poll them"]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking num_stream v0.1.1
[INFO] [stderr]     Checking criterion v0.3.1
[INFO] [stdout] warning: the item `stream_router` is imported redundantly
[INFO] [stdout]  --> examples/dedup.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use stream_router;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ the item `stream_router` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `stream_router` is imported redundantly
[INFO] [stdout]  --> examples/stateful.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use stream_router;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ the item `stream_router` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> examples/stateful.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> examples/dedup.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `stream_router` is imported redundantly
[INFO] [stdout]  --> examples/map.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use stream_router;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ the item `stream_router` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> examples/map.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `stream_router` is imported redundantly
[INFO] [stdout]  --> examples/simple.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use stream_router;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ the item `stream_router` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> examples/simple.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to an implementation block
[INFO] [stdout]    --> src/lib.rs:361:1
[INFO] [stdout]     |
[INFO] [stdout] 361 | #[must_use = "streams do nothing unless you `.await` or poll them"]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `stream_router` is imported redundantly
[INFO] [stdout]  --> examples/fan-out.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use stream_router;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ the item `stream_router` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> examples/fan-out.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `stream_router` is imported redundantly
[INFO] [stdout]  --> examples/bare_minimum.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use stream_router;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ the item `stream_router` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> examples/bare_minimum.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `stream_router` is imported redundantly
[INFO] [stdout]  --> examples/filter.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use stream_router;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ the item `stream_router` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> examples/filter.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.30s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "c6d51f04cc86be830dc0cc8279c492932019d00e838785005b9a30ba004c7e1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6d51f04cc86be830dc0cc8279c492932019d00e838785005b9a30ba004c7e1f", kill_on_drop: false }`
[INFO] [stdout] c6d51f04cc86be830dc0cc8279c492932019d00e838785005b9a30ba004c7e1f