[INFO] fetching crate vk-shader-macros 0.2.6...
[INFO] testing vk-shader-macros-0.2.6 against 1.49.0 for beta-1.50-1
[INFO] extracting crate vk-shader-macros 0.2.6 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate vk-shader-macros 0.2.6 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vk-shader-macros 0.2.6
[INFO] finished tweaking crates.io crate vk-shader-macros 0.2.6
[INFO] tweaked toml for crates.io crate vk-shader-macros 0.2.6 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 518c1cf4c0fb4204de1adde87590d902d14ffb0ef4141a7d3f8f8e073acf4ad8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "518c1cf4c0fb4204de1adde87590d902d14ffb0ef4141a7d3f8f8e073acf4ad8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "518c1cf4c0fb4204de1adde87590d902d14ffb0ef4141a7d3f8f8e073acf4ad8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "518c1cf4c0fb4204de1adde87590d902d14ffb0ef4141a7d3f8f8e073acf4ad8", kill_on_drop: false }`
[INFO] [stdout] 518c1cf4c0fb4204de1adde87590d902d14ffb0ef4141a7d3f8f8e073acf4ad8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4d96f7cc0a3960cadc091b71b7b80c87dd214e39935a148c5d0e628d46d00f3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b4d96f7cc0a3960cadc091b71b7b80c87dd214e39935a148c5d0e628d46d00f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling shaderc-sys v0.6.3
[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-1.0.57/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="derive"' --cfg 'feature="parsing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=9980fe4d2ad9cdc6 -C extra-filename=-9980fe4d2ad9cdc6 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-b8449736663a1660.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-4ff43fa145cc0264.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-1c0accd586890c80.rmeta --cap-lints allow --cap-lints=warn --cfg syn_disable_nightly_tests` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] The following warnings were emitted during compilation:
[INFO] [stderr] 
[INFO] [stderr] warning: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
[INFO] [stderr] warning: System installed library not found.  Falling back to build from source
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b4d96f7cc0a3960cadc091b71b7b80c87dd214e39935a148c5d0e628d46d00f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4d96f7cc0a3960cadc091b71b7b80c87dd214e39935a148c5d0e628d46d00f3", kill_on_drop: false }`
[INFO] [stdout] b4d96f7cc0a3960cadc091b71b7b80c87dd214e39935a148c5d0e628d46d00f3