[INFO] fetching crate flatbox_systems 0.1.0...
[INFO] checking flatbox_systems-0.1.0 against try#94382f34384023f3d2062a34ccf0bb6b4d44a75a for mutual-coercion
[INFO] extracting crate flatbox_systems 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate flatbox_systems 0.1.0
[INFO] finished tweaking crates.io crate flatbox_systems 0.1.0
[INFO] tweaked toml for crates.io crate flatbox_systems 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate flatbox_systems 0.1.0 on toolchain 94382f34384023f3d2062a34ccf0bb6b4d44a75a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+94382f34384023f3d2062a34ccf0bb6b4d44a75a" "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" "+94382f34384023f3d2062a34ccf0bb6b4d44a75a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 329 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+94382f34384023f3d2062a34ccf0bb6b4d44a75a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+94382f34384023f3d2062a34ccf0bb6b4d44a75a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7e774529758362cc2d7414d702fd612b5963323c0af47b1c8505a48a879891a
[INFO] running `Command { std: "docker" "start" "-a" "a7e774529758362cc2d7414d702fd612b5963323c0af47b1c8505a48a879891a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7e774529758362cc2d7414d702fd612b5963323c0af47b1c8505a48a879891a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7e774529758362cc2d7414d702fd612b5963323c0af47b1c8505a48a879891a", kill_on_drop: false }`
[INFO] [stdout] a7e774529758362cc2d7414d702fd612b5963323c0af47b1c8505a48a879891a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+94382f34384023f3d2062a34ccf0bb6b4d44a75a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8946c958ff3a3d95a7606394f1921f295169a317a7f4f06fbd9664a3f7f0348
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[INFO] [stderr]    Compiling typetag-impl v0.2.21
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[INFO] [stdout] error[E0308]: `?` operator has incompatible types
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/flatbox_assets-0.1.0/src/manager.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[typetag::serde(tag = "asset")]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait `Asset + Send + Sync`, found trait `Asset`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `?` operator cannot convert from `Box<dyn Asset + Send + Sync>` to `Box<dyn Asset>`
[INFO] [stdout]    = note: expected struct `Box<dyn Asset>`
[INFO] [stdout]               found struct `Box<dyn Asset + Send + Sync>`
[INFO] [stdout]    = note: this error originates in the attribute macro `typetag::serde` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: `?` operator has incompatible types
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/flatbox_assets-0.1.0/src/manager.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[typetag::serde(tag = "asset")]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait `Asset + Send + Sync`, found trait `Asset + Send`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `?` operator cannot convert from `Box<dyn Asset + Send + Sync>` to `Box<dyn Asset + Send>`
[INFO] [stdout]    = note: expected struct `Box<dyn Asset + Send>`
[INFO] [stdout]               found struct `Box<dyn Asset + Send + Sync>`
[INFO] [stdout]    = note: this error originates in the attribute macro `typetag::serde` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: `?` operator has incompatible types
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/flatbox_assets-0.1.0/src/manager.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[typetag::serde(tag = "asset")]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected trait `Asset + Send + Sync`, found trait `Asset + Sync`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `?` operator cannot convert from `Box<dyn Asset + Send + Sync>` to `Box<dyn Asset + Sync>`
[INFO] [stdout]    = note: expected struct `Box<dyn Asset + Sync>`
[INFO] [stdout]               found struct `Box<dyn Asset + Send + Sync>`
[INFO] [stdout]    = note: this error originates in the attribute macro `typetag::serde` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flatbox_assets` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "c8946c958ff3a3d95a7606394f1921f295169a317a7f4f06fbd9664a3f7f0348", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8946c958ff3a3d95a7606394f1921f295169a317a7f4f06fbd9664a3f7f0348", kill_on_drop: false }`
[INFO] [stdout] c8946c958ff3a3d95a7606394f1921f295169a317a7f4f06fbd9664a3f7f0348
