[INFO] fetching crate polywrap_plugin_implementor 0.1.10...
[INFO] checking polywrap_plugin_implementor-0.1.10 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate polywrap_plugin_implementor 0.1.10 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate polywrap_plugin_implementor 0.1.10 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 polywrap_plugin_implementor 0.1.10
[INFO] finished tweaking crates.io crate polywrap_plugin_implementor 0.1.10
[INFO] tweaked toml for crates.io crate polywrap_plugin_implementor 0.1.10 written to /workspace/builds/worker-0-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 138 packages
[INFO] [stderr]       Adding base64 v0.13.1 (latest: v0.22.0)
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding bigdecimal v0.3.1 (latest: v0.4.3)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding fancy-regex v0.10.0 (latest: v0.13.0)
[INFO] [stderr]       Adding fraction v0.12.2 (latest: v0.15.1)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding handlebars v4.5.0 (latest: v5.1.2)
[INFO] [stderr]       Adding iso8601 v0.5.1 (latest: v0.6.1)
[INFO] [stderr]       Adding jsonschema v0.16.1 (latest: v0.17.1)
[INFO] [stderr]       Adding redox_syscall v0.4.1 (latest: v0.5.1)
[INFO] [stderr]       Adding rustls v0.22.3 (latest: v0.23.4)
[INFO] [stderr]       Adding snafu v0.6.10 (latest: v0.8.2)
[INFO] [stderr]       Adding snafu-derive v0.6.10 (latest: v0.8.2)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded polywrap-jsonref v0.1.0
[INFO] [stderr]   Downloaded schemafy_core v0.6.0
[INFO] [stderr]   Downloaded snafu v0.6.10
[INFO] [stderr]   Downloaded polywrap_msgpack_serde v0.0.2
[INFO] [stderr]   Downloaded snafu-derive v0.6.10
[INFO] [stderr]   Downloaded polywrap_schemafy_lib v0.1.0
[INFO] [stderr]   Downloaded polywrap_schemafy v0.1.1
[INFO] [stderr]   Downloaded fancy-regex v0.10.0
[INFO] [stderr]   Downloaded fraction v0.12.2
[INFO] [stderr]   Downloaded iso8601 v0.5.1
[INFO] [stderr]   Downloaded num-cmp v0.1.0
[INFO] [stderr]   Downloaded jsonschema v0.16.1
[INFO] [stderr]   Downloaded wrap_manifest_schemas v0.1.11
[INFO] [stderr]   Downloaded polywrap_uri v0.1.11
[INFO] [stderr]   Downloaded polywrap_core v0.1.11
[INFO] [stderr]   Downloaded polywrap_core_macros v0.1.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] c214aafd723a3962b3cf22666dc7dd55a169c31649558b81b3476e896a02b686
[INFO] running `Command { std: "docker" "start" "-a" "c214aafd723a3962b3cf22666dc7dd55a169c31649558b81b3476e896a02b686", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c214aafd723a3962b3cf22666dc7dd55a169c31649558b81b3476e896a02b686", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c214aafd723a3962b3cf22666dc7dd55a169c31649558b81b3476e896a02b686", kill_on_drop: false }`
[INFO] [stdout] c214aafd723a3962b3cf22666dc7dd55a169c31649558b81b3476e896a02b686
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 998bb95c79d3b0df3c07f435453b7c8c7a8a938d1d59e7bdc07b6b593307b9a2
[INFO] running `Command { std: "docker" "start" "-a" "998bb95c79d3b0df3c07f435453b7c8c7a8a938d1d59e7bdc07b6b593307b9a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling regex-syntax v0.8.3
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[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]    Compiling aho-corasick v1.1.3
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[INFO] [stderr]    Compiling num-traits v0.2.18
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[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking spin v0.9.8
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[INFO] [stderr]     Checking unicode-bidi v0.3.15
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[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]     Checking zerocopy v0.7.32
[INFO] [stderr]     Checking num-conv v0.1.0
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[INFO] [stderr]     Checking url v2.5.0
[INFO] [stderr]     Checking parking_lot v0.12.1
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[INFO] [stderr]    Compiling serde_repr v0.1.18
[INFO] [stderr]    Compiling rustls v0.22.3
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking base64 v0.13.1
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[INFO] [stderr]     Checking serde_bytes v0.11.14
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[INFO] [stderr]    Compiling pest_derive v2.7.9
[INFO] [stderr]     Checking rustls-webpki v0.102.2
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]     Checking bigdecimal v0.3.1
[INFO] [stderr]     Checking polywrap_msgpack_serde v0.0.2
[INFO] [stderr]     Checking snafu v0.6.10
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking handlebars v4.5.0
[INFO] [stderr]     Checking fraction v0.12.2
[INFO] [stderr]    Compiling schemafy_core v0.6.0
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking fancy-regex v0.10.0
[INFO] [stderr]     Checking polywrap_uri v0.1.11
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling polywrap_core_macros v0.1.11
[INFO] [stderr]    Compiling polywrap_schemafy_lib v0.1.0
[INFO] [stderr]     Checking jsonschema v0.16.1
[INFO] [stderr]    Compiling polywrap_schemafy v0.1.1
[INFO] [stderr]     Checking ureq v2.9.6
[INFO] [stderr]     Checking polywrap-jsonref v0.1.0
[INFO] [stderr]     Checking wrap_manifest_schemas v0.1.11
[INFO] [stderr]     Checking polywrap_core v0.1.11
[INFO] [stderr]     Checking polywrap_plugin_implementor v0.1.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `output_is_option`
[INFO] [stdout]   --> src/lib.rs:73:33
[INFO] [stdout]    |
[INFO] [stdout] 73 |         |(_, (ident, ident_str, output_is_option, env_is_option))| {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_output_is_option`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output_is_option`
[INFO] [stdout]   --> src/lib.rs:73:33
[INFO] [stdout]    |
[INFO] [stdout] 73 |         |(_, (ident, ident_str, output_is_option, env_is_option))| {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_output_is_option`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.62s
[INFO] running `Command { std: "docker" "inspect" "998bb95c79d3b0df3c07f435453b7c8c7a8a938d1d59e7bdc07b6b593307b9a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "998bb95c79d3b0df3c07f435453b7c8c7a8a938d1d59e7bdc07b6b593307b9a2", kill_on_drop: false }`
[INFO] [stdout] 998bb95c79d3b0df3c07f435453b7c8c7a8a938d1d59e7bdc07b6b593307b9a2