[INFO] fetching crate lucetc 0.6.1...
[INFO] checking lucetc-0.6.1 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate lucetc 0.6.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate lucetc 0.6.1 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lucetc 0.6.1
[INFO] finished tweaking crates.io crate lucetc 0.6.1
[INFO] tweaked toml for crates.io crate lucetc 0.6.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate lucetc 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7dfdafbf803ca10de2bee91c75e98b6d4a3be4cc4ccee5d1f7c09f5367a61f2e
[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" "7dfdafbf803ca10de2bee91c75e98b6d4a3be4cc4ccee5d1f7c09f5367a61f2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7dfdafbf803ca10de2bee91c75e98b6d4a3be4cc4ccee5d1f7c09f5367a61f2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7dfdafbf803ca10de2bee91c75e98b6d4a3be4cc4ccee5d1f7c09f5367a61f2e", kill_on_drop: false }`
[INFO] [stdout] 7dfdafbf803ca10de2bee91c75e98b6d4a3be4cc4ccee5d1f7c09f5367a61f2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68500f88c874f95f5906bcf780527aacb996ac6cebe63ccc16bb47b8e73373bf
[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" "68500f88c874f95f5906bcf780527aacb996ac6cebe63ccc16bb47b8e73373bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling packed_struct v0.3.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking cranelift-entity v0.51.0
[INFO] [stderr]    Compiling target-lexicon v0.9.0
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]    Compiling memchr v2.3.2
[INFO] [stderr]    Compiling anyhow v1.0.26
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]    Compiling serde-big-array v0.2.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking wasmparser v0.39.3
[INFO] [stderr]     Checking parity-wasm v0.40.3
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking siphasher v0.3.1
[INFO] [stderr]    Compiling lucetc v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking xfailure v0.1.0
[INFO] [stderr]     Checking parity-wasm v0.41.0
[INFO] [stderr]     Checking human-size v0.4.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]     Checking bimap v0.2.0
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking miniz_oxide v0.3.6
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking wast v3.0.4
[INFO] [stderr]     Checking cranelift-bforest v0.51.0
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]    Compiling scroll v0.9.2
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling raw-cpuid v7.0.3
[INFO] [stderr]    Compiling raw-cpuid v6.1.0
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rpassword v4.0.5
[INFO] [stderr]    Compiling wabt-sys v0.7.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking aho-corasick v0.7.8
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking pbkdf2 v0.3.0
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]     Checking sha2 v0.8.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking backtrace v0.3.44
[INFO] [stderr]     Checking scrypt v0.2.0
[INFO] [stderr]     Checking minisign v0.5.14
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.15.44/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="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=8eaf5baf136746b1 -C extra-filename=-8eaf5baf136746b1 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-14b87d0cfb3a3067.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-3ab6671852ca27d4.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-5ef45b28e7fc52f2.rmeta --cap-lints allow --cap-lints=forbid --cfg syn_can_match_trailing_dollar --cfg syn_can_use_thread_id --cfg syn_can_use_associated_constants --cfg syn_can_call_macro_by_path` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "68500f88c874f95f5906bcf780527aacb996ac6cebe63ccc16bb47b8e73373bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68500f88c874f95f5906bcf780527aacb996ac6cebe63ccc16bb47b8e73373bf", kill_on_drop: false }`
[INFO] [stdout] 68500f88c874f95f5906bcf780527aacb996ac6cebe63ccc16bb47b8e73373bf