[INFO] cloning repository https://github.com/MaulingMonkey/rust_wasm_sample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MaulingMonkey/rust_wasm_sample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaulingMonkey%2Frust_wasm_sample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaulingMonkey%2Frust_wasm_sample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 54b9debd07fd8495fb1642b265e68187e13a1f77
[INFO] checking MaulingMonkey/rust_wasm_sample against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaulingMonkey%2Frust_wasm_sample" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MaulingMonkey/rust_wasm_sample 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 git repo https://github.com/MaulingMonkey/rust_wasm_sample
[INFO] finished tweaking git repo https://github.com/MaulingMonkey/rust_wasm_sample
[INFO] tweaked toml for git repo https://github.com/MaulingMonkey/rust_wasm_sample written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/MaulingMonkey/rust_wasm_sample 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.46
[INFO] [stderr]   Downloaded weedle v0.9.0
[INFO] [stderr]   Downloaded sourcefile v0.1.4
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.46
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.46
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.46
[INFO] [stderr]   Downloaded backtrace v0.3.30
[INFO] [stderr]   Downloaded libc v0.2.58
[INFO] [stderr]   Downloaded bumpalo v2.4.3
[INFO] [stderr]   Downloaded syn v0.15.36
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.46
[INFO] [stderr]   Downloaded web-sys v0.3.23
[INFO] [stderr]   Downloaded js-sys v0.3.23
[INFO] [stderr]   Downloaded wasm-bindgen-webidl v0.2.46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 8c379a69b324d59965d7f8154db19b90642ebb9c661b5c4a97732d7d21bd165c
[INFO] running `Command { std: "docker" "start" "-a" "8c379a69b324d59965d7f8154db19b90642ebb9c661b5c4a97732d7d21bd165c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c379a69b324d59965d7f8154db19b90642ebb9c661b5c4a97732d7d21bd165c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c379a69b324d59965d7f8154db19b90642ebb9c661b5c4a97732d7d21bd165c", kill_on_drop: false }`
[INFO] [stdout] 8c379a69b324d59965d7f8154db19b90642ebb9c661b5c4a97732d7d21bd165c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] d8e35f3aca118a927fa0e0b147b9af07bc2cf4e86a088a708e0d5aca0caa0e7b
[INFO] running `Command { std: "docker" "start" "-a" "d8e35f3aca118a927fa0e0b147b9af07bc2cf4e86a088a708e0d5aca0caa0e7b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.46
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling bumpalo v2.4.3
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.46
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling backtrace v0.3.30
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling weedle v0.9.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.46
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.46
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling wasm-bindgen-webidl v0.2.46
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.46
[INFO] [stderr]    Compiling web-sys v0.3.23
[INFO] [stderr]     Checking js-sys v0.3.23
[INFO] [stderr]     Checking rust_wasm_sample v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.62s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v4.2.3, wasm-bindgen v0.2.46
[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" "d8e35f3aca118a927fa0e0b147b9af07bc2cf4e86a088a708e0d5aca0caa0e7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8e35f3aca118a927fa0e0b147b9af07bc2cf4e86a088a708e0d5aca0caa0e7b", kill_on_drop: false }`
[INFO] [stdout] d8e35f3aca118a927fa0e0b147b9af07bc2cf4e86a088a708e0d5aca0caa0e7b
[INFO] checking MaulingMonkey/rust_wasm_sample against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaulingMonkey%2Frust_wasm_sample" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MaulingMonkey/rust_wasm_sample on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MaulingMonkey/rust_wasm_sample
[INFO] finished tweaking git repo https://github.com/MaulingMonkey/rust_wasm_sample
[INFO] tweaked toml for git repo https://github.com/MaulingMonkey/rust_wasm_sample written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/MaulingMonkey/rust_wasm_sample 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d35a73317392ada8d3fa069fa9e0f45390c7fb04b33b678945678ad5129f68b
[INFO] running `Command { std: "docker" "start" "-a" "7d35a73317392ada8d3fa069fa9e0f45390c7fb04b33b678945678ad5129f68b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d35a73317392ada8d3fa069fa9e0f45390c7fb04b33b678945678ad5129f68b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d35a73317392ada8d3fa069fa9e0f45390c7fb04b33b678945678ad5129f68b", kill_on_drop: false }`
[INFO] [stdout] 7d35a73317392ada8d3fa069fa9e0f45390c7fb04b33b678945678ad5129f68b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fba5bc42a2103c2012c6a3d642a54acc83de303aa819524a0e3d9d9d7c2bd30f
[INFO] running `Command { std: "docker" "start" "-a" "fba5bc42a2103c2012c6a3d642a54acc83de303aa819524a0e3d9d9d7c2bd30f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.46
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling bumpalo v2.4.3
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.46
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling backtrace v0.3.30
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling weedle v0.9.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.46
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.46
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling wasm-bindgen-webidl v0.2.46
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.46
[INFO] [stderr]    Compiling web-sys v0.3.23
[INFO] [stderr]     Checking js-sys v0.3.23
[INFO] [stderr]     Checking rust_wasm_sample v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.65s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v4.2.3, wasm-bindgen v0.2.46
[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" "fba5bc42a2103c2012c6a3d642a54acc83de303aa819524a0e3d9d9d7c2bd30f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fba5bc42a2103c2012c6a3d642a54acc83de303aa819524a0e3d9d9d7c2bd30f", kill_on_drop: false }`
[INFO] [stdout] fba5bc42a2103c2012c6a3d642a54acc83de303aa819524a0e3d9d9d7c2bd30f