[INFO] fetching crate ketos 0.12.0...
[INFO] testing ketos-0.12.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate ketos 0.12.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate ketos 0.12.0 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 ketos 0.12.0
[INFO] finished tweaking crates.io crate ketos 0.12.0
[INFO] tweaked toml for crates.io crate ketos 0.12.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate ketos 0.12.0 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] [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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7fb96e23e6f917ddef367ae650d01997b78989ff31f9371a7be795de6fcbde2c
[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" "7fb96e23e6f917ddef367ae650d01997b78989ff31f9371a7be795de6fcbde2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fb96e23e6f917ddef367ae650d01997b78989ff31f9371a7be795de6fcbde2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fb96e23e6f917ddef367ae650d01997b78989ff31f9371a7be795de6fcbde2c", kill_on_drop: false }`
[INFO] [stdout] 7fb96e23e6f917ddef367ae650d01997b78989ff31f9371a7be795de6fcbde2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 984ed9de3a9be54e4afdd0ae6e0091558bda82dd23d673a862c7fed07f71b7b4
[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" "984ed9de3a9be54e4afdd0ae6e0091558bda82dd23d673a862c7fed07f71b7b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling smallvec v0.6.13
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling smallstr v0.1.0
[INFO] [stderr]    Compiling terminfo v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling gumdrop_derive v0.7.0
[INFO] [stderr]    Compiling gumdrop v0.7.0
[INFO] [stderr]    Compiling mortal v0.2.1
[INFO] [stderr]    Compiling linefeed v0.6.0
[INFO] [stderr]    Compiling ketos v0.12.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ketos/compile.rs:333:9
[INFO] [stdout]     |
[INFO] [stdout] 333 |         replace(&mut self.blocks, new_blocks);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.34s
[INFO] running `Command { std: "docker" "inspect" "984ed9de3a9be54e4afdd0ae6e0091558bda82dd23d673a862c7fed07f71b7b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "984ed9de3a9be54e4afdd0ae6e0091558bda82dd23d673a862c7fed07f71b7b4", kill_on_drop: false }`
[INFO] [stdout] 984ed9de3a9be54e4afdd0ae6e0091558bda82dd23d673a862c7fed07f71b7b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", 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] 2e8b0a8b75a3b418b56e7e700e90901127b718278f4cb2f32a6c90a7432730e2
[INFO] running `Command { std: "docker" "start" "-a" "2e8b0a8b75a3b418b56e7e700e90901127b718278f4cb2f32a6c90a7432730e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling ketos_derive v0.12.0
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ketos/compile.rs:333:9
[INFO] [stdout]     |
[INFO] [stdout] 333 |         replace(&mut self.blocks, new_blocks);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling ketos v0.12.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `ketos`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name ketos --edition=2018 src/ketos/lib.rs --error-format=json --json=diagnostic-rendered-ansi --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --cfg 'feature="default"' -C metadata=19ec96ad5bd6abc5 -C extra-filename=-19ec96ad5bd6abc5 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern assert_matches=/opt/rustwide/target/debug/deps/libassert_matches-a003356a754b1ee4.rlib --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-76ff728e7fb88045.rlib --extern dirs=/opt/rustwide/target/debug/deps/libdirs-228a0076845953da.rlib --extern gumdrop=/opt/rustwide/target/debug/deps/libgumdrop-b3cf917364415a51.rlib --extern ketos_derive=/opt/rustwide/target/debug/deps/libketos_derive-91feea1c66858967.so --extern linefeed=/opt/rustwide/target/debug/deps/liblinefeed-ac9fb641123e09ac.rlib --extern num=/opt/rustwide/target/debug/deps/libnum-9df5ea92a879234a.rlib --extern rand=/opt/rustwide/target/debug/deps/librand-2e43765fd2e8cbb4.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: linking with `cc` failed: signal: 9
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-Wl,--eh-frame-hdr" "-L" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.compile.ac7j8944-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04" "/opt/rustwide/target/debug/deps/compile-8b6fb6c1eec6bb04.ubn9fr5trlo9lo1.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libtest-6609e81d71a1bf05.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libterm-c352aab3e89370e6.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgetopts-5a89b15f567bd092.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunicode_width-f48d3ad387757b0f.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_std-bf2dc5d6d88f70a5.rlib" "/opt/rustwide/target/debug/deps/libketos-f1cceaac76a3de75.rlib" "/opt/rustwide/target/debug/deps/librand-2e43765fd2e8cbb4.rlib" "/opt/rustwide/target/debug/deps/librand_chacha-93ec60afa1cabb21.rlib" "/opt/rustwide/target/debug/deps/libc2_chacha-c86e0ba3e108cdc5.rlib" "/opt/rustwide/target/debug/deps/libppv_lite86-449783e61805f843.rlib" "/opt/rustwide/target/debug/deps/librand_core-b74c8e84b4c46c26.rlib" "/opt/rustwide/target/debug/deps/libgetrandom-9723c9e17649027d.rlib" "/opt/rustwide/target/debug/deps/liblibc-0f3e6c6e62d4b7c7.rlib" "/opt/rustwide/target/debug/deps/libcfg_if-b10e0993eefc366b.rlib" "/opt/rustwide/target/debug/deps/libnum-9df5ea92a879234a.rlib" "/opt/rustwide/target/debug/deps/libnum_rational-d413d4df824257ba.rlib" "/opt/rustwide/target/debug/deps/libnum_iter-5381a1a40f1c8c59.rlib" "/opt/rustwide/target/debug/deps/libnum_complex-f5905bcb26b6dc4c.rlib" "/opt/rustwide/target/debug/deps/libnum_bigint-19eb7eaf4ea1a835.rlib" "/opt/rustwide/target/debug/deps/libnum_integer-56d1dbbda983ddb9.rlib" "/opt/rustwide/target/debug/deps/libnum_traits-bed471606d5f44bf.rlib" "/opt/rustwide/target/debug/deps/libbyteorder-76ff728e7fb88045.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-e12de7683a34c500.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-446a53c2e468675f.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-86fef9fb252a2d33.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-3bed9bfd30304751.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-0e38eeb474a7b386.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-a846ed547b824740.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-c9540f0a4fb9265d.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-7d2ca66c92c356eb.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-147e2c808f949493.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-bd2a4369506670e9.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-74bfdd0ce7d0ed48.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-6777f47f1c491841.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-b104f1790174f2be.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-db37898996f45c13.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-25b7435131fc4938.rlib" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-9d4b6f3c097e876e.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/1.49.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-3f953ad652ab829a.rlib" "-Wl,-Bdynamic" "-lutil" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc"
[INFO] [stdout]   = note: 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2e8b0a8b75a3b418b56e7e700e90901127b718278f4cb2f32a6c90a7432730e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e8b0a8b75a3b418b56e7e700e90901127b718278f4cb2f32a6c90a7432730e2", kill_on_drop: false }`
[INFO] [stdout] 2e8b0a8b75a3b418b56e7e700e90901127b718278f4cb2f32a6c90a7432730e2