[INFO] cloning repository https://github.com/nervosnetwork/wasm-ckb-syscall-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nervosnetwork/wasm-ckb-syscall-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnervosnetwork%2Fwasm-ckb-syscall-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnervosnetwork%2Fwasm-ckb-syscall-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 15f60f38bf256bc3e693c50fb109630a88db2444
[INFO] checking nervosnetwork/wasm-ckb-syscall-demo against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnervosnetwork%2Fwasm-ckb-syscall-demo" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nervosnetwork/wasm-ckb-syscall-demo 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 git repo https://github.com/nervosnetwork/wasm-ckb-syscall-demo
[INFO] finished tweaking git repo https://github.com/nervosnetwork/wasm-ckb-syscall-demo
[INFO] tweaked toml for git repo https://github.com/nervosnetwork/wasm-ckb-syscall-demo written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/nervosnetwork/wasm-ckb-syscall-demo 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]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.51
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.51
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.51
[INFO] [stderr]   Downloaded proc-macro2 v1.0.5
[INFO] [stderr]   Downloaded bumpalo v2.6.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.51
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.51
[INFO] [stderr]   Downloaded syn v1.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] dda09a8793e8c59b1b03f8bb5e272947e8310895dffb811c48f15c3017831c8c
[INFO] running `Command { std: "docker" "start" "-a" "dda09a8793e8c59b1b03f8bb5e272947e8310895dffb811c48f15c3017831c8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dda09a8793e8c59b1b03f8bb5e272947e8310895dffb811c48f15c3017831c8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dda09a8793e8c59b1b03f8bb5e272947e8310895dffb811c48f15c3017831c8c", kill_on_drop: false }`
[INFO] [stdout] dda09a8793e8c59b1b03f8bb5e272947e8310895dffb811c48f15c3017831c8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 7381036a84b9253a76e20dcc610986674637ca9e9ae58047e72f24af42e85672
[INFO] running `Command { std: "docker" "start" "-a" "7381036a84b9253a76e20dcc610986674637ca9e9ae58047e72f24af42e85672", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.51
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling bumpalo v2.6.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.51
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.51
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.51
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.51
[INFO] [stderr]     Checking wasm-ckb-syscall-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.71s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.51
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "7381036a84b9253a76e20dcc610986674637ca9e9ae58047e72f24af42e85672", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7381036a84b9253a76e20dcc610986674637ca9e9ae58047e72f24af42e85672", kill_on_drop: false }`
[INFO] [stdout] 7381036a84b9253a76e20dcc610986674637ca9e9ae58047e72f24af42e85672
[INFO] checking nervosnetwork/wasm-ckb-syscall-demo against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnervosnetwork%2Fwasm-ckb-syscall-demo" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nervosnetwork/wasm-ckb-syscall-demo on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nervosnetwork/wasm-ckb-syscall-demo
[INFO] finished tweaking git repo https://github.com/nervosnetwork/wasm-ckb-syscall-demo
[INFO] tweaked toml for git repo https://github.com/nervosnetwork/wasm-ckb-syscall-demo written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/nervosnetwork/wasm-ckb-syscall-demo 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32c82e1cb7e3c3e81cfa49bdb0884a4a3c3d9537976372b144ff4e21ce7c1190
[INFO] running `Command { std: "docker" "start" "-a" "32c82e1cb7e3c3e81cfa49bdb0884a4a3c3d9537976372b144ff4e21ce7c1190", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32c82e1cb7e3c3e81cfa49bdb0884a4a3c3d9537976372b144ff4e21ce7c1190", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32c82e1cb7e3c3e81cfa49bdb0884a4a3c3d9537976372b144ff4e21ce7c1190", kill_on_drop: false }`
[INFO] [stdout] 32c82e1cb7e3c3e81cfa49bdb0884a4a3c3d9537976372b144ff4e21ce7c1190
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb8b0f4e5b4c00b808ebaa87f1083d8ebbc80dad7b05152184eecce45c505ea2
[INFO] running `Command { std: "docker" "start" "-a" "fb8b0f4e5b4c00b808ebaa87f1083d8ebbc80dad7b05152184eecce45c505ea2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.51
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bumpalo v2.6.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.51
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/bumpalo-2.6.0/src/collections/str/lossy.rs:78:45
[INFO] [stdout]    |
[INFO] [stdout] 78 |                   macro_rules! error { () => ({
[INFO] [stdout]    |  _____________________________________________^
[INFO] [stdout] 79 | |                     unsafe {
[INFO] [stdout] 80 | |                         let r = Utf8LossyChunk {
[INFO] [stdout] 81 | |                             valid: str::from_utf8_unchecked(&self.source[0..i_]),
[INFO] [stdout] ...  |
[INFO] [stdout] 86 | |                     }
[INFO] [stdout] 87 | |                 })}
[INFO] [stdout]    | |_________________^ cannot infer type
[INFO] [stdout] ...
[INFO] [stdout] 92 |                               error!();
[INFO] [stdout]    |                               -------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `error` (in Nightly builds, run with -Z macro-backtrace for more info)
[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 E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bumpalo` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "fb8b0f4e5b4c00b808ebaa87f1083d8ebbc80dad7b05152184eecce45c505ea2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb8b0f4e5b4c00b808ebaa87f1083d8ebbc80dad7b05152184eecce45c505ea2", kill_on_drop: false }`
[INFO] [stdout] fb8b0f4e5b4c00b808ebaa87f1083d8ebbc80dad7b05152184eecce45c505ea2