[INFO] fetching crate stream_multiplexer 0.16.1...
[INFO] checking stream_multiplexer-0.16.1 against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] extracting crate stream_multiplexer 0.16.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate stream_multiplexer 0.16.1 on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stream_multiplexer 0.16.1
[INFO] finished tweaking crates.io crate stream_multiplexer 0.16.1
[INFO] tweaked toml for crates.io crate stream_multiplexer 0.16.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dashmap v4.0.0-rc6
[INFO] [stderr]   Downloaded alto_logger v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "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] 4e6f9eb80898339d6e354732709fd9874e15dee9f5a7e380e90e045afb54d0e1
[INFO] running `Command { std: "docker" "start" "-a" "4e6f9eb80898339d6e354732709fd9874e15dee9f5a7e380e90e045afb54d0e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e6f9eb80898339d6e354732709fd9874e15dee9f5a7e380e90e045afb54d0e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e6f9eb80898339d6e354732709fd9874e15dee9f5a7e380e90e045afb54d0e1", kill_on_drop: false }`
[INFO] [stdout] 4e6f9eb80898339d6e354732709fd9874e15dee9f5a7e380e90e045afb54d0e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "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] faaec2f0bd95e11809b03fc4a5b39e6b418f0734bb0592ed529a0190b13d6ea1
[INFO] running `Command { std: "docker" "start" "-a" "faaec2f0bd95e11809b03fc4a5b39e6b418f0734bb0592ed529a0190b13d6ea1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking vec-arena v0.5.2
[INFO] [stderr]     Checking futures-sink v0.3.8
[INFO] [stderr]     Checking parking v1.0.6
[INFO] [stderr]     Checking easy-parallel v3.1.0
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking tokio v0.2.24
[INFO] [stderr]     Checking sharded-slab v0.0.9
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stderr]     Checking futures-task v0.3.8
[INFO] [stderr]     Checking dashmap v4.0.0-rc6
[INFO] [stderr]     Checking multitask v0.2.0
[INFO] [stderr]     Checking alto_logger v0.3.7
[INFO] [stderr]     Checking blocking v0.5.2
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking polling v0.1.9
[INFO] [stderr]     Checking socket2 v0.3.17
[INFO] [stderr]     Checking parking_lot_core v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking async-io v0.1.11
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking async-executor v0.1.2
[INFO] [stderr]     Checking smol v0.3.3
[INFO] [stderr]     Checking stream_multiplexer v0.16.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0453]: warn(unsafe_code) incompatible with previous forbid in same scope
[INFO] [stdout]   --> src/lib.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 78 | #![forbid(unsafe_code)]
[INFO] [stdout]    |           ----------- `forbid` level set here
[INFO] [stdout] ...
[INFO] [stdout] 86 |     unsafe_code,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0453]: warn(unsafe_code) incompatible with previous forbid in same scope
[INFO] [stdout]   --> src/lib.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 78 | #![forbid(unsafe_code)]
[INFO] [stdout]    |           ----------- `forbid` level set here
[INFO] [stdout] ...
[INFO] [stdout] 86 |     unsafe_code,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[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 E0453`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0453`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `stream_multiplexer`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "faaec2f0bd95e11809b03fc4a5b39e6b418f0734bb0592ed529a0190b13d6ea1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faaec2f0bd95e11809b03fc4a5b39e6b418f0734bb0592ed529a0190b13d6ea1", kill_on_drop: false }`
[INFO] [stdout] faaec2f0bd95e11809b03fc4a5b39e6b418f0734bb0592ed529a0190b13d6ea1