[INFO] cloning repository https://github.com/cobalt-org/cobalt.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cobalt-org/cobalt.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcobalt-org%2Fcobalt.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcobalt-org%2Fcobalt.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f0e5917f7e6a3e87f630259ee84743949e8b165b
[INFO] testing cobalt-org/cobalt.rs against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcobalt-org%2Fcobalt.rs" "/workspace/builds/worker-24/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-24/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cobalt-org/cobalt.rs on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cobalt-org/cobalt.rs
[INFO] finished tweaking git repo https://github.com/cobalt-org/cobalt.rs
[INFO] tweaked toml for git repo https://github.com/cobalt-org/cobalt.rs written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate git repo https://github.com/cobalt-org/cobalt.rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded plist v1.2.1
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[INFO] [stderr]   Downloaded inotify-sys v0.1.5
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[INFO] [stderr]   Downloaded predicates-core v1.0.2
[INFO] [stderr]   Downloaded console v0.14.1
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[INFO] [stderr]   Downloaded yaml-rust v0.4.5
[INFO] [stderr]   Downloaded bincode v1.3.3
[INFO] [stderr]   Downloaded shellexpand v2.1.0
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[INFO] [stderr]   Downloaded anymap2 v0.13.0
[INFO] [stderr]   Downloaded ghp v0.1.2
[INFO] [stderr]   Downloaded numerals v0.1.4
[INFO] [stderr]   Downloaded liquid-derive v0.23.0
[INFO] [stderr]   Downloaded liquid-lib v0.23.0
[INFO] [stderr]   Downloaded notify v4.0.17
[INFO] [stderr]   Downloaded serde_with_macros v1.5.0
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[INFO] [stderr]   Downloaded sass-rs v0.2.2
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08543d0fd14bbf99970c394be3c402019426a42fc8ff49d54adf525437b59cfd
[INFO] running `Command { std: "docker" "start" "-a" "08543d0fd14bbf99970c394be3c402019426a42fc8ff49d54adf525437b59cfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08543d0fd14bbf99970c394be3c402019426a42fc8ff49d54adf525437b59cfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08543d0fd14bbf99970c394be3c402019426a42fc8ff49d54adf525437b59cfd", kill_on_drop: false }`
[INFO] [stdout] 08543d0fd14bbf99970c394be3c402019426a42fc8ff49d54adf525437b59cfd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b57b8fc65534ececf66c64dc4ef7978f12ed0ef17d86d699571e2459e146b6bc
[INFO] running `Command { std: "docker" "start" "-a" "b57b8fc65534ececf66c64dc4ef7978f12ed0ef17d86d699571e2459e146b6bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.77
[INFO] [stderr]    Compiling libc v0.2.103
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling linked-hash-map v0.5.4
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling gimli v0.25.0
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling rustversion v1.0.5
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]    Compiling anymap2 v0.13.0
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling xml-rs v0.8.4
[INFO] [stderr]    Compiling pkg-config v0.3.20
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling deunicode v1.3.1
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling unicode-bidi v0.3.6
[INFO] [stderr]    Compiling funty v1.1.0
[INFO] [stderr]    Compiling derive_builder v0.9.0
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling dtoa v0.4.8
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling pulldown-cmark v0.8.0
[INFO] [stderr]    Compiling bytecount v0.6.2
[INFO] [stderr]    Compiling utf8-width v0.1.5
[INFO] [stderr]    Compiling numerals v0.1.4
[INFO] [stderr]    Compiling macro-utils v0.1.3
[INFO] [stderr]    Compiling ascii v1.0.0
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling cow-utils v0.1.2
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling pathdiff v0.2.1
[INFO] [stderr]    Compiling chunked_transfer v1.4.0
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling tinyvec v1.5.0
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr] error: could not compile `proc-macro2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name build_script_build --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.29/build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="proc-macro"' -C metadata=68af89e56c7555f8 -C extra-filename=-68af89e56c7555f8 --out-dir /opt/rustwide/target/debug/build/proc-macro2-68af89e56c7555f8 -L dependency=/opt/rustwide/target/debug/deps --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" "b57b8fc65534ececf66c64dc4ef7978f12ed0ef17d86d699571e2459e146b6bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b57b8fc65534ececf66c64dc4ef7978f12ed0ef17d86d699571e2459e146b6bc", kill_on_drop: false }`
[INFO] [stdout] b57b8fc65534ececf66c64dc4ef7978f12ed0ef17d86d699571e2459e146b6bc