[INFO] cloning repository https://github.com/fallingyang/rust-lab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fallingyang/rust-lab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffallingyang%2Frust-lab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffallingyang%2Frust-lab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f4bf9b9856f569f37c51688924415ca71b45310d
[INFO] checking fallingyang/rust-lab against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffallingyang%2Frust-lab" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fallingyang/rust-lab on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fallingyang/rust-lab
[INFO] finished tweaking git repo https://github.com/fallingyang/rust-lab
[INFO] tweaked toml for git repo https://github.com/fallingyang/rust-lab written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/fallingyang/rust-lab already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cranelift-frontend v0.67.0
[INFO] [stderr]   Downloaded cranelift-codegen-shared v0.67.0
[INFO] [stderr]   Downloaded cranelift-native v0.67.0
[INFO] [stderr]   Downloaded wasmtime-debug v0.20.0
[INFO] [stderr]   Downloaded wasmtime-environ v0.20.0
[INFO] [stderr]   Downloaded mqttbytes v0.3.0
[INFO] [stderr]   Downloaded ordered-float v2.2.0
[INFO] [stderr]   Downloaded cranelift-codegen-meta v0.67.0
[INFO] [stderr]   Downloaded cranelift-bforest v0.67.0
[INFO] [stderr]   Downloaded rumqttc v0.6.0
[INFO] [stderr]   Downloaded mini-redis v0.3.0
[INFO] [stderr]   Downloaded wasmtime-cache v0.20.0
[INFO] [stderr]   Downloaded tokio-modbus v0.4.0
[INFO] [stderr]   Downloaded cranelift-codegen v0.67.0
[INFO] [stderr]   Downloaded tokio v0.3.2
[INFO] [stderr]   Downloaded wasmtime-jit v0.20.0
[INFO] [stderr]   Downloaded wasmtime-profiling v0.20.0
[INFO] [stderr]   Downloaded wasmtime-obj v0.20.0
[INFO] [stderr]   Downloaded tokio-serial v4.3.3
[INFO] [stderr]   Downloaded regalloc v0.0.30
[INFO] [stderr]   Downloaded wasmtime-cranelift v0.20.0
[INFO] [stderr]   Downloaded cranelift-entity v0.67.0
[INFO] [stderr]   Downloaded cranelift-wasm v0.67.0
[INFO] [stderr]   Downloaded wasmtime v0.20.0
[INFO] [stderr]   Downloaded wasmtime-runtime v0.20.0
[INFO] [stderr]   Downloaded quiche v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02757062924d4411e4b0c0ca0a7f4987538fe6df289e616713d5f5477204d0bd
[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" "02757062924d4411e4b0c0ca0a7f4987538fe6df289e616713d5f5477204d0bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02757062924d4411e4b0c0ca0a7f4987538fe6df289e616713d5f5477204d0bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02757062924d4411e4b0c0ca0a7f4987538fe6df289e616713d5f5477204d0bd", kill_on_drop: false }`
[INFO] [stdout] 02757062924d4411e4b0c0ca0a7f4987538fe6df289e616713d5f5477204d0bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c13814091f23405fcc89e8ba6c987a7b2c46dfde744363a27f39f5a92666461e
[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" "c13814091f23405fcc89e8ba6c987a7b2c46dfde744363a27f39f5a92666461e", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking futures-core v0.3.14
[INFO] [stderr]     Checking arc-swap v0.4.7
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.20
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking futures-sink v0.3.14
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking futures-io v0.3.14
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-task v0.3.14
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.67.0
[INFO] [stderr]    Compiling target-lexicon v0.11.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking bytes v0.6.0
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking tower-layer v0.3.0
[INFO] [stderr]    Compiling const_fn v0.4.2
[INFO] [stderr]     Checking wasmparser v0.59.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking wasmparser v0.57.0
[INFO] [stderr]     Checking more-asserts v0.2.1
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking try-lock v0.2.3
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]    Compiling wasmtime-cache v0.20.0
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]     Checking pollster v0.2.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]     Checking object v0.19.0
[INFO] [stderr]     Checking log-mdc v0.1.0
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking sharded-slab v0.1.0
[INFO] [stderr]     Checking instant v0.1.8
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking futures-channel v0.3.14
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]     Checking anyhow v1.0.40
[INFO] [stderr]     Checking wast v26.0.1
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]     Checking mqttbytes v0.3.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling tokio v1.6.0
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]     Checking aho-corasick v0.7.14
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking addr2line v0.13.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking crossbeam-epoch v0.9.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]    Compiling cc v1.0.61
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.35
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]     Checking region v2.2.0
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking errno v0.2.7
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking directories v2.0.2
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking atoi v0.3.3
[INFO] [stderr]     Checking ordered-float v2.2.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]    Compiling zstd-sys v1.4.17+zstd.1.4.5
[INFO] [stderr]    Compiling raw-cpuid v7.0.3
[INFO] [stderr]    Compiling wasmtime-runtime v0.20.0
[INFO] [stderr]    Compiling quiche v0.6.0
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]     Checking wat v1.0.27
[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-1.0.72/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --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=03d4a0b5a88bc45b -C extra-filename=-03d4a0b5a88bc45b --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-eadab0c611d04674.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-32e1249e152bdcad.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-4182131ee577b5da.rmeta --cap-lints allow --cap-lints=forbid` (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: cc: fatal error: Killed signal terminated program cc1
[INFO] [stderr] warning: compilation terminated.
[INFO] [stderr] warning: cc: fatal error: Killed signal terminated program cc1
[INFO] [stderr] warning: compilation terminated.
[INFO] [stderr] warning: cc: fatal error: Killed signal terminated program cc1
[INFO] [stderr] warning: compilation terminated.
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c13814091f23405fcc89e8ba6c987a7b2c46dfde744363a27f39f5a92666461e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c13814091f23405fcc89e8ba6c987a7b2c46dfde744363a27f39f5a92666461e", kill_on_drop: false }`
[INFO] [stdout] c13814091f23405fcc89e8ba6c987a7b2c46dfde744363a27f39f5a92666461e