[INFO] fetching crate isla 0.1.0...
[INFO] testing isla-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate isla 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate isla 0.1.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate isla 0.1.0
[INFO] finished tweaking crates.io crate isla 0.1.0
[INFO] tweaked toml for crates.io crate isla 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate isla 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4c2ebb369c3c93a96c3e8e5d3f7feeab36271f51457ab0e4a717f0191206ade
[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" "a4c2ebb369c3c93a96c3e8e5d3f7feeab36271f51457ab0e4a717f0191206ade", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4c2ebb369c3c93a96c3e8e5d3f7feeab36271f51457ab0e4a717f0191206ade", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4c2ebb369c3c93a96c3e8e5d3f7feeab36271f51457ab0e4a717f0191206ade", kill_on_drop: false }`
[INFO] [stdout] a4c2ebb369c3c93a96c3e8e5d3f7feeab36271f51457ab0e4a717f0191206ade
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f7763425a2102086663944f3be7836729d4f66d6ea21d3f822785ee419e5de98
[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" "f7763425a2102086663944f3be7836729d4f66d6ea21d3f822785ee419e5de98", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling siphasher v0.3.3
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling lalrpop-util v0.19.0
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling z3-sys v0.5.0
[INFO] [stderr]    Compiling plain v0.2.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling isla v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling bit-set v0.5.1
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling ena v0.14.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling sha2 v0.8.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling crossbeam-channel v0.4.2
[INFO] [stderr]    Compiling crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling petgraph v0.5.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling crossbeam v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling scroll_derive v0.10.1
[INFO] [stderr]    Compiling scroll v0.10.1
[INFO] [stderr]    Compiling goblin v0.2.1
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling string_cache v0.8.0
[INFO] [stderr]    Compiling bincode v1.2.1
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling lalrpop v0.19.0
[INFO] [stderr]    Compiling isla-lib v0.1.0
[INFO] [stderr]    Compiling isla-cat v0.1.0
[INFO] [stderr]    Compiling isla-axiomatic v0.1.0
[INFO] [stderr] error: could not compile `isla`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name isla_axiomatic --edition=2018 src/axiomatic.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C metadata=ed892fed1671e276 -C extra-filename=-ed892fed1671e276 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bincode=/opt/rustwide/target/debug/deps/libbincode-12ca7b9628ecfe6f.rlib --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-842374180f0ce363.rlib --extern getopts=/opt/rustwide/target/debug/deps/libgetopts-c8e5a46933b94018.rlib --extern isla=/opt/rustwide/target/debug/deps/libisla-6202214bb70cfc0e.rlib --extern isla_axiomatic=/opt/rustwide/target/debug/deps/libisla_axiomatic-ee44968ceddcb1ee.rlib --extern isla_cat=/opt/rustwide/target/debug/deps/libisla_cat-ceb16b90db3593e0.rlib --extern isla_lib=/opt/rustwide/target/debug/deps/libisla_lib-ad922b6ca0d60aaa.rlib --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-75f852d814175400.rlib --extern rand=/opt/rustwide/target/debug/deps/librand-157cb269c37c157f.rlib --extern serde=/opt/rustwide/target/debug/deps/libserde-e2df24e5a287c7ed.rlib --extern sha2=/opt/rustwide/target/debug/deps/libsha2-ac16c9f8be4489f2.rlib --extern toml=/opt/rustwide/target/debug/deps/libtoml-6841a2df383d6ac9.rlib --cap-lints=warn -L . -L .. -L ..` (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" "f7763425a2102086663944f3be7836729d4f66d6ea21d3f822785ee419e5de98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7763425a2102086663944f3be7836729d4f66d6ea21d3f822785ee419e5de98", kill_on_drop: false }`
[INFO] [stdout] f7763425a2102086663944f3be7836729d4f66d6ea21d3f822785ee419e5de98