[INFO] cloning repository https://github.com/playzero/subzero
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/playzero/subzero" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fplayzero%2Fsubzero", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fplayzero%2Fsubzero'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7c600e34f3c29288e309b2f997def15073987a10
[INFO] checking playzero/subzero against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fplayzero%2Fsubzero" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  83% (1471/1768)
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[INFO] validating manifest of git repo https://github.com/playzero/subzero on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/playzero/subzero
[INFO] finished tweaking git repo https://github.com/playzero/subzero
[INFO] tweaked toml for git repo https://github.com/playzero/subzero written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/playzero/subzero already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] acc635b3e676bddf3884a04fc7b89aeeec04f9facc463843f724f122afa8ecc6
[INFO] running `Command { std: "docker" "start" "-a" "acc635b3e676bddf3884a04fc7b89aeeec04f9facc463843f724f122afa8ecc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acc635b3e676bddf3884a04fc7b89aeeec04f9facc463843f724f122afa8ecc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acc635b3e676bddf3884a04fc7b89aeeec04f9facc463843f724f122afa8ecc6", kill_on_drop: false }`
[INFO] [stdout] acc635b3e676bddf3884a04fc7b89aeeec04f9facc463843f724f122afa8ecc6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7086434c6e31e01b2c340dfab1f4f84ed45bfbe0c6b2336244686ec4ab67cb7f
[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" "7086434c6e31e01b2c340dfab1f4f84ed45bfbe0c6b2336244686ec4ab67cb7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling libc v0.2.84
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.6
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]    Compiling regex-syntax v0.6.22
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking futures v0.1.30
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking futures-core v0.3.12
[INFO] [stderr]     Checking futures-io v0.3.12
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking ahash v0.4.7
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking sp-std v3.0.0 (/opt/rustwide/workdir/primitives/std)
[INFO] [stderr]    Compiling paste v1.0.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.69
[INFO] [stderr]    Compiling bumpalo v3.6.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.69
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling target-lexicon v0.11.1
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]     Checking tower-service v0.3.1
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]    Compiling pin-project-lite v0.2.4
[INFO] [stderr]    Compiling futures-sink v0.3.12
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling cpuid-bool v0.1.2
[INFO] [stderr]    Compiling tap v1.0.0
[INFO] [stderr]    Compiling sc-consensus-slots v0.9.0 (/opt/rustwide/workdir/client/consensus/slots)
[INFO] [stderr]    Compiling funty v1.1.0
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling bindgen v0.54.0
[INFO] [stderr]    Compiling winapi v0.3.9
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]    Compiling hex v0.4.2
[INFO] [stderr]    Compiling adler v0.2.3
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling fastrand v1.4.0
[INFO] [stderr]    Compiling vec-arena v1.0.0
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking assert_matches v1.4.0
[INFO] [stderr]    Compiling trybuild v1.0.39
[INFO] [stderr]     Checking dissimilar v1.0.2
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]    Compiling chain-spec-builder v2.0.0 (/opt/rustwide/workdir/bin/utils/chain-spec-builder)
[INFO] [stderr]    Compiling lock_api v0.4.2
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling tracing-core v0.1.17
[INFO] [stderr]    Compiling sharded-slab v0.1.1
[INFO] [stderr]     Checking ckb-merkle-mountain-range v0.3.1
[INFO] [stderr]     Checking parity-wasm v0.32.0
[INFO] [stderr]     Checking tinyvec v1.1.1
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking futures-channel v0.3.12
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling semver v0.6.0
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling atomic v0.5.0
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking form_urlencoded v1.0.0
[INFO] [stderr]     Checking quicksink v0.1.2
[INFO] [stderr]     Checking dns-parser v0.8.0
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking blake2s_simd v0.5.11
[INFO] [stderr]     Checking blake2b_simd v0.5.11
[INFO] [stderr]     Checking http v0.2.3
[INFO] [stderr]     Checking tokio-sync v0.1.8
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking matrixmultiply v0.2.4
[INFO] [stderr]     Checking wast v32.0.0
[INFO] [stderr]    Compiling ed25519 v1.0.3
[INFO] [stderr]    Compiling cpp_demangle v0.3.2
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling wasmi-validation v0.3.0
[INFO] [stderr]     Checking linked_hash_set v0.1.4
[INFO] [stderr]    Compiling async-lock v2.3.0
[INFO] [stderr]    Compiling platforms v1.1.0
[INFO] [stderr]     Checking plotters-svg v0.3.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking anyhow v1.0.38
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking predicates v1.0.7
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]     Checking libm v0.2.1
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling build-helper v0.1.1
[INFO] [stderr]     Checking lru v0.6.3
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]     Checking unicode-normalization v0.1.16
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling futures-lite v1.11.3
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking uint v0.9.0
[INFO] [stderr]     Checking hash256-std-hasher v0.15.2
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking bitvec v0.20.1
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]    Compiling snow v0.7.2
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking quote v1.0.8
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking parking_lot_core v0.8.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking errno v0.2.7
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking region v2.2.0
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking memmap2 v0.2.0
[INFO] [stderr]     Checking fs-swap v0.2.5
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking fdlimit v0.2.1
[INFO] [stderr]     Checking rpassword v5.0.1
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking nix v0.19.1
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]     Checking substrate-build-script-utils v3.0.0 (/opt/rustwide/workdir/utils/build-script-utils)
[INFO] [stderr]     Checking wat v1.0.33
[INFO] [stderr]     Checking keccak-hasher v0.15.3
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking syn v1.0.60
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.1
[INFO] [stderr]     Checking integer-sqrt v0.1.5
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking plotters v0.3.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking signal-hook v0.1.17
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking miow v0.3.6
[INFO] [stderr]     Checking directories v3.0.1
[INFO] [stderr]     Checking directories-next v2.0.0
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking assert_cmd v1.0.2
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking block-cipher v0.8.0
[INFO] [stderr]     Checking universal-hash v0.4.0
[INFO] [stderr]     Checking aead v0.3.2
[INFO] [stderr]     Checking cipher v0.2.5
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]     Checking trie-standardmap v0.15.2
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling url v2.2.0
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr] error: could not compile `wast`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name wast --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/wast-32.0.0/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="default"' --cfg 'feature="wasm-module"' -C metadata=072e03555bb5c7b4 -C extra-filename=-072e03555bb5c7b4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern leb128=/opt/rustwide/target/debug/deps/libleb128-b58a34c616ec8944.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" "7086434c6e31e01b2c340dfab1f4f84ed45bfbe0c6b2336244686ec4ab67cb7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7086434c6e31e01b2c340dfab1f4f84ed45bfbe0c6b2336244686ec4ab67cb7f", kill_on_drop: false }`
[INFO] [stdout] 7086434c6e31e01b2c340dfab1f4f84ed45bfbe0c6b2336244686ec4ab67cb7f