[INFO] fetching crate loro-common 0.1.0...
[INFO] checking loro-common-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate loro-common 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate loro-common 0.1.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate loro-common 0.1.0
[INFO] finished tweaking crates.io crate loro-common 0.1.0
[INFO] tweaked toml for crates.io crate loro-common 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 76 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding debug-log v0.2.2 (latest: v0.3.1)
[INFO] [stderr]       Adding enum-as-inner v0.5.1 (latest: v0.6.0)
[INFO] [stderr]       Adding hash32 v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding heapless v0.7.17 (latest: v0.8.0)
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
[INFO] [stderr]       Adding js-sys v0.3.63 (latest: v0.3.69)
[INFO] [stderr]       Adding loro-rle v0.1.0 (latest: v0.2.0)
[INFO] [stderr]       Adding ouroboros v0.15.6 (latest: v0.18.3)
[INFO] [stderr]       Adding ouroboros_macro v0.15.6 (latest: v0.18.3)
[INFO] [stderr]       Adding phf_shared v0.10.0 (latest: v0.11.2)
[INFO] [stderr]       Adding redox_syscall v0.4.1 (latest: v0.5.1)
[INFO] [stderr]       Adding siphasher v0.3.11 (latest: v1.0.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wasm-bindgen v0.2.86 (latest: v0.2.92)
[INFO] [stderr]       Adding wasm-bindgen-backend v0.2.86 (latest: v0.2.92)
[INFO] [stderr]       Adding wasm-bindgen-macro v0.2.86 (latest: v0.2.92)
[INFO] [stderr]       Adding wasm-bindgen-macro-support v0.2.86 (latest: v0.2.92)
[INFO] [stderr]       Adding wasm-bindgen-shared v0.2.86 (latest: v0.2.92)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crdt-list v0.4.1
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.86
[INFO] [stderr]   Downloaded loro-rle v0.1.0
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.86
[INFO] [stderr]   Downloaded append-only-bytes v0.1.12
[INFO] [stderr]   Downloaded arref v0.1.0
[INFO] [stderr]   Downloaded arbitrary v1.3.2
[INFO] [stderr]   Downloaded js-sys v0.3.63
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.86
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.86
[INFO] [stderr]   Downloaded debug-log v0.2.2
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2fc457e030435c107fdf746ce0a42d9fa9f550c884d88fafa45fc19dcfdabd6b
[INFO] running `Command { std: "docker" "start" "-a" "2fc457e030435c107fdf746ce0a42d9fa9f550c884d88fafa45fc19dcfdabd6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fc457e030435c107fdf746ce0a42d9fa9f550c884d88fafa45fc19dcfdabd6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fc457e030435c107fdf746ce0a42d9fa9f550c884d88fafa45fc19dcfdabd6b", kill_on_drop: false }`
[INFO] [stdout] 2fc457e030435c107fdf746ce0a42d9fa9f550c884d88fafa45fc19dcfdabd6b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70e3ca1dc26f5749614a5b96b2cc53cd756f1d5ed3797e42ca9e46a5f24cd0d7
[INFO] running `Command { std: "docker" "start" "-a" "70e3ca1dc26f5749614a5b96b2cc53cd756f1d5ed3797e42ca9e46a5f24cd0d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking num-complex v0.4.5
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking aliasable v0.1.3
[INFO] [stderr]     Checking siphasher v0.3.11
[INFO] [stderr]     Checking arref v0.1.0
[INFO] [stderr]     Checking crdt-list v0.4.1
[INFO] [stderr]    Compiling ouroboros_macro v0.15.6
[INFO] [stderr]     Checking phf_shared v0.10.0
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking debug-log v0.2.2
[INFO] [stderr]    Compiling enum-as-inner v0.5.1
[INFO] [stderr]    Compiling derive_arbitrary v1.3.2
[INFO] [stderr]     Checking bumpalo v3.15.4
[INFO] [stderr]     Checking append-only-bytes v0.1.12
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking new_debug_unreachable v1.0.6
[INFO] [stderr]    Compiling enum-as-inner v0.6.0
[INFO] [stderr]     Checking string_cache v0.8.7
[INFO] [stderr]     Checking arbitrary v1.3.2
[INFO] [stderr]     Checking ouroboros v0.15.6
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking loro-rle v0.1.0
[INFO] [stderr]     Checking loro-common v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.45s
[INFO] running `Command { std: "docker" "inspect" "70e3ca1dc26f5749614a5b96b2cc53cd756f1d5ed3797e42ca9e46a5f24cd0d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70e3ca1dc26f5749614a5b96b2cc53cd756f1d5ed3797e42ca9e46a5f24cd0d7", kill_on_drop: false }`
[INFO] [stdout] 70e3ca1dc26f5749614a5b96b2cc53cd756f1d5ed3797e42ca9e46a5f24cd0d7