[INFO] fetching crate midas 0.5.12...
[INFO] testing midas-0.5.12 against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] extracting crate midas 0.5.12 into /workspace/builds/worker-44/source
[INFO] validating manifest of crates.io crate midas 0.5.12 on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate midas 0.5.12
[INFO] finished tweaking crates.io crate midas 0.5.12
[INFO] tweaked toml for crates.io crate midas 0.5.12 written to /workspace/builds/worker-44/source/Cargo.toml
[INFO] crate crates.io crate midas 0.5.12 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e99ebd44a03292b60a78ddf9b44c210020445376f23a1730d009eeb3d6421591
[INFO] running `Command { std: "docker" "start" "-a" "e99ebd44a03292b60a78ddf9b44c210020445376f23a1730d009eeb3d6421591", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e99ebd44a03292b60a78ddf9b44c210020445376f23a1730d009eeb3d6421591", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e99ebd44a03292b60a78ddf9b44c210020445376f23a1730d009eeb3d6421591", kill_on_drop: false }`
[INFO] [stdout] e99ebd44a03292b60a78ddf9b44c210020445376f23a1730d009eeb3d6421591
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 964cda8bd6c3d36ce43776d18c30b6ec2e220c02e7d28839dad9f598e5cbff75
[INFO] running `Command { std: "docker" "start" "-a" "964cda8bd6c3d36ce43776d18c30b6ec2e220c02e7d28839dad9f598e5cbff75", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling futures-sink v0.3.14
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-core v0.3.14
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling subtle v2.4.0
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling slab v0.4.3
[INFO] [stderr]    Compiling futures-io v0.3.14
[INFO] [stderr]    Compiling futures-task v0.3.14
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling cpuid-bool v0.1.2
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling fallible-iterator v0.2.0
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling dotenv v0.15.0
[INFO] [stderr]    Compiling tinyvec v1.2.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.5
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]    Compiling tracing-core v0.1.19
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling sharded-slab v0.1.3
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling futures-channel v0.3.14
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling tracing-log v0.1.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling unicode-normalization v0.1.17
[INFO] [stderr]    Compiling mio v0.7.11
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling socket2 v0.4.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling block-buffer v0.9.0
[INFO] [stderr]    Compiling crypto-mac v0.10.0
[INFO] [stderr]    Compiling sha2 v0.9.3
[INFO] [stderr]    Compiling md-5 v0.9.1
[INFO] [stderr]    Compiling hmac v0.10.1
[INFO] [stderr]    Compiling stringprep v0.1.2
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling regex v1.5.3
[INFO] [stderr]    Compiling url v2.2.1
[INFO] [stderr]    Compiling tracing-serde v0.1.2
[INFO] [stderr]    Compiling postgres-protocol v0.6.1
[INFO] [stderr]    Compiling tokio-util v0.6.6
[INFO] [stderr]    Compiling postgres-types v0.2.1
[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-1.0.71/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="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' -C metadata=5ad5463d6b540623 -C extra-filename=-5ad5463d6b540623 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-eed4dd76d1b9bb4b.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-755812e69fc2f21b.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-3c8a88541efd8c80.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" "964cda8bd6c3d36ce43776d18c30b6ec2e220c02e7d28839dad9f598e5cbff75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "964cda8bd6c3d36ce43776d18c30b6ec2e220c02e7d28839dad9f598e5cbff75", kill_on_drop: false }`
[INFO] [stdout] 964cda8bd6c3d36ce43776d18c30b6ec2e220c02e7d28839dad9f598e5cbff75