[INFO] fetching crate autocxx-engine 0.23.1...
[INFO] testing autocxx-engine-0.23.1 against master#159ba8a92c9e2fa4121f106176309521f4af87e9+rustflags=-Copt-level=3 for pr-107051
[INFO] extracting crate autocxx-engine 0.23.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate autocxx-engine 0.23.1 on toolchain 159ba8a92c9e2fa4121f106176309521f4af87e9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+159ba8a92c9e2fa4121f106176309521f4af87e9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate autocxx-engine 0.23.1
[INFO] finished tweaking crates.io crate autocxx-engine 0.23.1
[INFO] tweaked toml for crates.io crate autocxx-engine 0.23.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+159ba8a92c9e2fa4121f106176309521f4af87e9" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+159ba8a92c9e2fa4121f106176309521f4af87e9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cxx-gen v0.7.87
[INFO] [stderr]   Downloaded autocxx-parser v0.23.1
[INFO] [stderr]   Downloaded autocxx-bindgen v0.62.0
[INFO] [stderr]   Downloaded indoc v1.0.8
[INFO] [stderr]   Downloaded miette-derive v5.5.0
[INFO] [stderr]   Downloaded prettyplease v0.1.23
[INFO] [stderr]   Downloaded aquamarine v0.1.12
[INFO] [stderr]   Downloaded miette v5.5.0
[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@sha256:7c93e6f9a94679f34221d1005849d4c83862f85b14a264fa0883942f4d043a66" "/opt/rustwide/cargo-home/bin/cargo" "+159ba8a92c9e2fa4121f106176309521f4af87e9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d03f139a6059a398e333c209b31941276edd3136c2d55ab83f6d3dc7a2b6f12
[INFO] running `Command { std: "docker" "start" "-a" "0d03f139a6059a398e333c209b31941276edd3136c2d55ab83f6d3dc7a2b6f12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d03f139a6059a398e333c209b31941276edd3136c2d55ab83f6d3dc7a2b6f12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d03f139a6059a398e333c209b31941276edd3136c2d55ab83f6d3dc7a2b6f12", kill_on_drop: false }`
[INFO] [stdout] 0d03f139a6059a398e333c209b31941276edd3136c2d55ab83f6d3dc7a2b6f12
[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 -Copt-level=3" "-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@sha256:7c93e6f9a94679f34221d1005849d4c83862f85b14a264fa0883942f4d043a66" "/opt/rustwide/cargo-home/bin/cargo" "+159ba8a92c9e2fa4121f106176309521f4af87e9" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf62d9c506cbc7484eb1f4a19fe1b272c3770bd9656f0e076ae4887e035a1ff4
[INFO] running `Command { std: "docker" "start" "-a" "cf62d9c506cbc7484eb1f4a19fe1b272c3770bd9656f0e076ae4887e035a1ff4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stderr]    Compiling clang-sys v1.4.0
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stderr]    Compiling autocxx-bindgen v0.62.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling prettyplease v0.1.23
[INFO] [stderr]    Compiling codespan-reporting v0.11.1
[INFO] [stderr]    Compiling miette-derive v5.5.0
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling which v4.4.0
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling indoc v1.0.8
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling aquamarine v0.1.12
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling miette v5.5.0
[INFO] [stderr]    Compiling cxx-gen v0.7.87
[INFO] [stderr]    Compiling autocxx-parser v0.23.1
[INFO] [stderr]    Compiling autocxx-engine v0.23.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-1.0.107/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit-mut"' -C metadata=f8c81fcfa883c425 -C extra-filename=-f8c81fcfa883c425 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-ba8f91ae0e6a3d28.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-7a0d00e0e0fdb1ac.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-488d9b1a6199d7b2.rmeta --cap-lints allow --cap-lints=forbid -Copt-level=3` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "cf62d9c506cbc7484eb1f4a19fe1b272c3770bd9656f0e076ae4887e035a1ff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf62d9c506cbc7484eb1f4a19fe1b272c3770bd9656f0e076ae4887e035a1ff4", kill_on_drop: false }`
[INFO] [stdout] cf62d9c506cbc7484eb1f4a19fe1b272c3770bd9656f0e076ae4887e035a1ff4