[INFO] fetching crate salmon 0.5.0...
[INFO] checking salmon-0.5.0 against try#0ab79c4b48ad19260fa46623f452c1b403a360e8 for pr-74315
[INFO] extracting crate salmon 0.5.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate salmon 0.5.0 on toolchain 0ab79c4b48ad19260fa46623f452c1b403a360e8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate salmon 0.5.0
[INFO] finished tweaking crates.io crate salmon 0.5.0
[INFO] tweaked toml for crates.io crate salmon 0.5.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77145c3e4ed246786f9e3babfe24984693e17757fc62f42cb099fe9190b21d74
[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" "77145c3e4ed246786f9e3babfe24984693e17757fc62f42cb099fe9190b21d74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77145c3e4ed246786f9e3babfe24984693e17757fc62f42cb099fe9190b21d74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77145c3e4ed246786f9e3babfe24984693e17757fc62f42cb099fe9190b21d74", kill_on_drop: false }`
[INFO] [stdout] 77145c3e4ed246786f9e3babfe24984693e17757fc62f42cb099fe9190b21d74
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d39000aa1a48091193ead5aaa4e0c564b7ec00493e8467afed60b81a21053709
[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" "d39000aa1a48091193ead5aaa4e0c564b7ec00493e8467afed60b81a21053709", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling bindgen v0.53.3
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling procedural-masquerade v0.1.7
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking thin-slice v0.1.1
[INFO] [stderr]    Compiling pulldown-cmark v0.5.3
[INFO] [stderr]     Checking ego-tree v0.6.2
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking dtoa-short v0.3.2
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]     Checking phf_shared v0.7.24
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking tendril v0.4.1
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]     Checking flate2 v1.0.16
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling clap v2.33.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling sass-sys v0.4.21
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling phf_generator v0.7.24
[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-1.0.35/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -Cembed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=e67b5a356086d49f -C extra-filename=-e67b5a356086d49f --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-1b302864f2364734.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-a4f5581ec63b3a22.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-1c1787496cb918bb.rmeta --cap-lints allow --cap-lints=forbid` (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" "d39000aa1a48091193ead5aaa4e0c564b7ec00493e8467afed60b81a21053709", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d39000aa1a48091193ead5aaa4e0c564b7ec00493e8467afed60b81a21053709", kill_on_drop: false }`
[INFO] [stdout] d39000aa1a48091193ead5aaa4e0c564b7ec00493e8467afed60b81a21053709