[INFO] fetching crate vkcargo 0.45.1...
[INFO] testing vkcargo-0.45.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate vkcargo 0.45.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate vkcargo 0.45.1 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 vkcargo 0.45.1
[INFO] finished tweaking crates.io crate vkcargo 0.45.1
[INFO] tweaked toml for crates.io crate vkcargo 0.45.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate vkcargo 0.45.1 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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] c22feba48d61d197c4adfea404d027253ae6eef155d33e0843da7824dae35e44
[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" "c22feba48d61d197c4adfea404d027253ae6eef155d33e0843da7824dae35e44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c22feba48d61d197c4adfea404d027253ae6eef155d33e0843da7824dae35e44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c22feba48d61d197c4adfea404d027253ae6eef155d33e0843da7824dae35e44", kill_on_drop: false }`
[INFO] [stdout] c22feba48d61d197c4adfea404d027253ae6eef155d33e0843da7824dae35e44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 59f73abf6e0b5fc387d7579359781eb9a4a665ee2fca0bcad715156c4bfee12d
[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" "59f73abf6e0b5fc387d7579359781eb9a4a665ee2fca0bcad715156c4bfee12d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling anyhow v1.0.28
[INFO] [stderr]    Compiling curl v0.4.28
[INFO] [stderr]    Compiling utf8parse v0.1.1
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling opener v0.4.1
[INFO] [stderr]    Compiling rustc-workspace-hack v1.0.0
[INFO] [stderr]    Compiling bytesize v1.0.0
[INFO] [stderr]    Compiling humantime v2.0.0
[INFO] [stderr]    Compiling im-rc v14.3.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling filetime v0.2.9
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling bstr v0.2.12
[INFO] [stderr]    Compiling bitmaps v2.1.0
[INFO] [stderr]    Compiling vte v0.3.3
[INFO] [stderr]    Compiling tar v0.4.26
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling strip-ansi-escapes v0.1.0
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling openssl-sys v0.9.55
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.3
[INFO] [stderr]    Compiling libssh2-sys v0.2.16
[INFO] [stderr]    Compiling curl-sys v0.4.30+curl-7.69.1
[INFO] [stderr]    Compiling libgit2-sys v0.12.2+1.0.0
[INFO] [stderr]    Compiling regex v1.3.6
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling openssl v0.10.29
[INFO] [stderr]    Compiling sized-chunks v0.5.3
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling globset v0.4.5
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling ignore v0.4.14
[INFO] [stderr]    Compiling crypto-hash v0.3.4
[INFO] [stderr]    Compiling git2 v0.13.1
[INFO] [stderr]    Compiling git2-curl v0.14.0
[INFO] [stderr]    Compiling serde_json v1.0.51
[INFO] [stderr]    Compiling cargo-platform v0.1.1
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling serde_ignored v0.1.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling crates-io v0.31.0
[INFO] [stderr]    Compiling rustfix v0.5.1
[INFO] [stderr]    Compiling vkcargo v0.45.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/cargo/sources/git/utils.rs:841:17
[INFO] [stdout]     |
[INFO] [stdout] 841 |                 mem::replace(repo, new);
[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] [stderr] error: could not compile `vkcargo`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name cargo --edition=2018 src/cargo/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=98ef9895e5dd0ea1 -C extra-filename=-98ef9895e5dd0ea1 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-5e18862234bdcb74.rmeta --extern atty=/opt/rustwide/target/debug/deps/libatty-9b793a5c66d96a6b.rmeta --extern bytesize=/opt/rustwide/target/debug/deps/libbytesize-fd4e290ce79b120f.rmeta --extern cargo_platform=/opt/rustwide/target/debug/deps/libcargo_platform-3a938374d766338f.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-65318f4873498ba5.rmeta --extern crates_io=/opt/rustwide/target/debug/deps/libcrates_io-1c02f3819b618110.rmeta --extern crossbeam_utils=/opt/rustwide/target/debug/deps/libcrossbeam_utils-f70100d05e1798e6.rmeta --extern crypto_hash=/opt/rustwide/target/debug/deps/libcrypto_hash-fcf139c85995c65c.rmeta --extern curl=/opt/rustwide/target/debug/deps/libcurl-b72bceecb9cfc0f0.rmeta --extern curl_sys=/opt/rustwide/target/debug/deps/libcurl_sys-6af0c91d43f4254e.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-02fbc20d4fb6cfd9.rmeta --extern filetime=/opt/rustwide/target/debug/deps/libfiletime-6b9bbd5c17a10220.rmeta --extern flate2=/opt/rustwide/target/debug/deps/libflate2-f0499c49fb573423.rmeta --extern fs2=/opt/rustwide/target/debug/deps/libfs2-e7497c7143c6dbbe.rmeta --extern git2=/opt/rustwide/target/debug/deps/libgit2-4f5b5f4ff3827b9b.rmeta --extern git2_curl=/opt/rustwide/target/debug/deps/libgit2_curl-316169225838a932.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-35a1b8661089f616.rmeta --extern hex=/opt/rustwide/target/debug/deps/libhex-8a54554534812d95.rmeta --extern home=/opt/rustwide/target/debug/deps/libhome-235bc50f95e524c8.rmeta --extern humantime=/opt/rustwide/target/debug/deps/libhumantime-ee00accc82b59421.rmeta --extern ignore=/opt/rustwide/target/debug/deps/libignore-dcc2ec46a01b28d9.rmeta --extern im_rc=/opt/rustwide/target/debug/deps/libim_rc-a71feb0c0962bd1b.rmeta --extern jobserver=/opt/rustwide/target/debug/deps/libjobserver-e75bad2385097c6c.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-7895c92c6d278491.rmeta --extern lazycell=/opt/rustwide/target/debug/deps/liblazycell-90b04f6abebff41b.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-bc745ef621153834.rmeta --extern libgit2_sys=/opt/rustwide/target/debug/deps/liblibgit2_sys-063a068aeff2dd04.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-1761913616bdc5f1.rmeta --extern memchr=/opt/rustwide/target/debug/deps/libmemchr-68751ffea57ec29e.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-5db21253c9722249.rmeta --extern opener=/opt/rustwide/target/debug/deps/libopener-91eb3d1199298e7c.rmeta --extern percent_encoding=/opt/rustwide/target/debug/deps/libpercent_encoding-118ab8cd0c12994c.rmeta --extern remove_dir_all=/opt/rustwide/target/debug/deps/libremove_dir_all-e6bdecb256edde3d.rmeta --extern rustc_workspace_hack=/opt/rustwide/target/debug/deps/librustc_workspace_hack-9264911c79e2a251.rmeta --extern rustfix=/opt/rustwide/target/debug/deps/librustfix-649993286a133ae4.rmeta --extern same_file=/opt/rustwide/target/debug/deps/libsame_file-af3c3c7843ff20ed.rmeta --extern semver=/opt/rustwide/target/debug/deps/libsemver-95cd1d2969a97d13.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-84c5b1c07850be7d.rmeta --extern serde_ignored=/opt/rustwide/target/debug/deps/libserde_ignored-9a51efbd53ecbc50.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-34e35b2661a9b357.rmeta --extern shell_escape=/opt/rustwide/target/debug/deps/libshell_escape-22c4db9c2009b4ff.rmeta --extern strip_ansi_escapes=/opt/rustwide/target/debug/deps/libstrip_ansi_escapes-774ce3f8ea66fb98.rmeta --extern tar=/opt/rustwide/target/debug/deps/libtar-92426c45ee3cebeb.rmeta --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-8caf02b61a920e8c.rmeta --extern termcolor=/opt/rustwide/target/debug/deps/libtermcolor-9cb8c404138a090a.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-64110b2e0dae856f.rmeta --extern unicode_width=/opt/rustwide/target/debug/deps/libunicode_width-382bc28e71ec1b15.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-9023492ceb52ed9a.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-c2e96d08d138ae4f.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-c239aebdeb046bad.rmeta --cap-lints=warn -L native=/opt/rustwide/target/debug/build/curl-sys-afd09600815299ff/out/build -L native=/opt/rustwide/target/debug/build/libnghttp2-sys-df6062b5f953aa02/out/i/lib -L native=/usr/lib/x86_64-linux-gnu -L native=/opt/rustwide/target/debug/build/libgit2-sys-8efdf4992fb0d2e6/out/build -L native=/usr/lib/x86_64-linux-gnu -L native=/opt/rustwide/target/debug/build/libssh2-sys-8a15c8101f2b4bc0/out/build` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "59f73abf6e0b5fc387d7579359781eb9a4a665ee2fca0bcad715156c4bfee12d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59f73abf6e0b5fc387d7579359781eb9a4a665ee2fca0bcad715156c4bfee12d", kill_on_drop: false }`
[INFO] [stdout] 59f73abf6e0b5fc387d7579359781eb9a4a665ee2fca0bcad715156c4bfee12d