[INFO] fetching crate genawaiter 0.99.1...
[INFO] checking genawaiter-0.99.1 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124305
[INFO] extracting crate genawaiter 0.99.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate genawaiter 0.99.1 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate genawaiter 0.99.1
[INFO] finished tweaking crates.io crate genawaiter 0.99.1
[INFO] tweaked toml for crates.io crate genawaiter 0.99.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 28 packages to latest compatible versions
[INFO] [stderr]       Adding proc-macro-error v0.4.12 (latest: v1.0.4)
[INFO] [stderr]       Adding proc-macro-error-attr v0.4.12 (latest: v1.0.4)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.60)
[INFO] [stderr]       Adding syn-mid v0.5.4 (latest: v0.6.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro-error-attr v0.4.12
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]   Downloaded genawaiter-proc-macro v0.99.1
[INFO] [stderr]   Downloaded proc-macro-error v0.4.12
[INFO] [stderr]   Downloaded genawaiter-macro v0.99.1
[INFO] [stderr]   Downloaded syn-mid v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 95f0cae7a7c246b4182bdd31d4735fdcfc53ba6dc7e9e82a51885f8a71f0fc3c
[INFO] running `Command { std: "docker" "start" "-a" "95f0cae7a7c246b4182bdd31d4735fdcfc53ba6dc7e9e82a51885f8a71f0fc3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95f0cae7a7c246b4182bdd31d4735fdcfc53ba6dc7e9e82a51885f8a71f0fc3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95f0cae7a7c246b4182bdd31d4735fdcfc53ba6dc7e9e82a51885f8a71f0fc3c", kill_on_drop: false }`
[INFO] [stdout] 95f0cae7a7c246b4182bdd31d4735fdcfc53ba6dc7e9e82a51885f8a71f0fc3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c085a174f2cd189b9410a27ba6007517318a671979363b87d80eb3363430cd54
[INFO] running `Command { std: "docker" "start" "-a" "c085a174f2cd189b9410a27ba6007517318a671979363b87d80eb3363430cd54", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking genawaiter-macro v0.99.1
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling syn-mid v0.5.4
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]    Compiling genawaiter-proc-macro v0.99.1
[INFO] [stderr]     Checking genawaiter v0.99.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/stack/mod.rs:468:13
[INFO] [stdout]     |
[INFO] [stdout] 468 |             drop(gen);
[INFO] [stdout]     |             ^^^^^---^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `&mut stack::generator::Gen<'_, i32, (), {async block@src/stack/mod.rs:456:17: 461:18}>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.54s
[INFO] running `Command { std: "docker" "inspect" "c085a174f2cd189b9410a27ba6007517318a671979363b87d80eb3363430cd54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c085a174f2cd189b9410a27ba6007517318a671979363b87d80eb3363430cd54", kill_on_drop: false }`
[INFO] [stdout] c085a174f2cd189b9410a27ba6007517318a671979363b87d80eb3363430cd54
[INFO] checking genawaiter-0.99.1 against try#44523379467bbd2050af931a040d10c2b764b443 for pr-124305
[INFO] extracting crate genawaiter 0.99.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate genawaiter 0.99.1 on toolchain 44523379467bbd2050af931a040d10c2b764b443
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate genawaiter 0.99.1
[INFO] finished tweaking crates.io crate genawaiter 0.99.1
[INFO] tweaked toml for crates.io crate genawaiter 0.99.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 28 packages to latest compatible versions
[INFO] [stderr]       Adding proc-macro-error v0.4.12 (latest: v1.0.4)
[INFO] [stderr]       Adding proc-macro-error-attr v0.4.12 (latest: v1.0.4)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.60)
[INFO] [stderr]       Adding syn-mid v0.5.4 (latest: v0.6.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 594b195fe416fb2c94a77365b7fcab592b8106bd4ed70356ebf3f0f4bfd7d6ed
[INFO] running `Command { std: "docker" "start" "-a" "594b195fe416fb2c94a77365b7fcab592b8106bd4ed70356ebf3f0f4bfd7d6ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "594b195fe416fb2c94a77365b7fcab592b8106bd4ed70356ebf3f0f4bfd7d6ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "594b195fe416fb2c94a77365b7fcab592b8106bd4ed70356ebf3f0f4bfd7d6ed", kill_on_drop: false }`
[INFO] [stdout] 594b195fe416fb2c94a77365b7fcab592b8106bd4ed70356ebf3f0f4bfd7d6ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+44523379467bbd2050af931a040d10c2b764b443" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f69858449435254d90cbaa96821c8aa77fef3d27cb8f91cf8dfc8c492dbc6f0d
[INFO] running `Command { std: "docker" "start" "-a" "f69858449435254d90cbaa96821c8aa77fef3d27cb8f91cf8dfc8c492dbc6f0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking genawaiter-macro v0.99.1
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling syn-mid v0.5.4
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]    Compiling genawaiter-proc-macro v0.99.1
[INFO] [stderr]     Checking genawaiter v0.99.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0453]: warn(future_incompatible) incompatible with previous forbid
[INFO] [stdout]    --> src/lib.rs:261:9
[INFO] [stdout]     |
[INFO] [stdout] 261 | #![warn(future_incompatible, rust_2018_compatibility, rust_2018_idioms, unused)]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ overruled by previous forbid
[INFO] [stdout]     |
[INFO] [stdout]     = note: `forbid` lint level is the default for where_clauses_object_safety
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0453]: warn(future_incompatible) incompatible with previous forbid
[INFO] [stdout]    --> src/lib.rs:261:9
[INFO] [stdout]     |
[INFO] [stdout] 261 | #![warn(future_incompatible, rust_2018_compatibility, rust_2018_idioms, unused)]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ overruled by previous forbid
[INFO] [stdout]     |
[INFO] [stdout]     = note: `forbid` lint level is the default for where_clauses_object_safety
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0453`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `genawaiter` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0453`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `genawaiter` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "f69858449435254d90cbaa96821c8aa77fef3d27cb8f91cf8dfc8c492dbc6f0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f69858449435254d90cbaa96821c8aa77fef3d27cb8f91cf8dfc8c492dbc6f0d", kill_on_drop: false }`
[INFO] [stdout] f69858449435254d90cbaa96821c8aa77fef3d27cb8f91cf8dfc8c492dbc6f0d