[INFO] cloning repository https://github.com/redwarp/fractal-trees
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/redwarp/fractal-trees" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredwarp%2Ffractal-trees", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredwarp%2Ffractal-trees'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 47a21c2b765b9cdada5cfb258187c877a4c83ae1
[INFO] checking redwarp/fractal-trees against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredwarp%2Ffractal-trees" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/redwarp/fractal-trees on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/redwarp/fractal-trees
[INFO] finished tweaking git repo https://github.com/redwarp/fractal-trees
[INFO] tweaked toml for git repo https://github.com/redwarp/fractal-trees written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/redwarp/fractal-trees already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded skia-bindings v0.33.1
[INFO] [stderr]   Downloaded skia-safe v0.34.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90199091b37ce15fbce7061ca6549db3c2df70eb686d566607c19ac1b2471f18
[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" "90199091b37ce15fbce7061ca6549db3c2df70eb686d566607c19ac1b2471f18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90199091b37ce15fbce7061ca6549db3c2df70eb686d566607c19ac1b2471f18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90199091b37ce15fbce7061ca6549db3c2df70eb686d566607c19ac1b2471f18", kill_on_drop: false }`
[INFO] [stdout] 90199091b37ce15fbce7061ca6549db3c2df70eb686d566607c19ac1b2471f18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b57f2a1f2df9e081fb69c9395f8751c7f1e3d24438cd5547ed4d030151f42e4c
[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" "b57f2a1f2df9e081fb69c9395f8751c7f1e3d24438cd5547ed4d030151f42e4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling bindgen v0.55.1
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling adler v0.2.3
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc_vector2d v1.0.2
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling curl-sys v0.4.36+curl-7.71.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.2
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling libloading v0.6.3
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling socket2 v0.3.15
[INFO] [stderr]    Compiling filetime v0.2.12
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking vector2d v2.2.0
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling tar v0.4.30
[INFO] [stderr]    Compiling clang-sys v1.0.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling flate2 v1.0.17
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling curl v0.4.33
[INFO] [stderr]    Compiling skia-bindings v0.33.1
[INFO] [stderr] error: failed to run custom build command for `skia-bindings v0.33.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/skia-bindings-9ea089e86e5ede3b/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-env-changed=SKIA_DEBUG
[INFO] [stderr]   HOST: x86_64-unknown-linux-gnu
[INFO] [stderr]   cargo:rerun-if-env-changed=SKIA_OFFLINE_SOURCE_DIR
[INFO] [stderr]   cargo:rerun-if-env-changed=FORCE_SKIA_BUILD
[INFO] [stderr]   cargo:rerun-if-env-changed=FORCE_SKIA_BINARIES_DOWNLOAD
[INFO] [stderr]   TRYING TO DOWNLOAD AND INSTALL SKIA BINARIES: 0.33.1/4d54e0925d6d72d2456e-x86_64-unknown-linux-gnu
[INFO] [stderr]   cargo:rerun-if-env-changed=SKIA_BINARIES_URL
[INFO] [stderr]     FROM: https://github.com/rust-skia/skia-binaries/releases/download/0.33.1/skia-binaries-4d54e0925d6d72d2456e-x86_64-unknown-linux-gnu.tar.gz
[INFO] [stderr]   DOWNLOAD AND INSTALL FAILED: [6] Couldn't resolve host name
[INFO] [stderr]   STARTING A FULL BUILD
[INFO] [stderr]   Probing 'python'
[INFO] [stderr]   Python 2 found: "python"
[INFO] [stderr]   DOWNLOADING: https://codeload.github.com/rust-skia/skia/tar.gz/m85-0.32.2
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Failed to download https://codeload.github.com/rust-skia/skia/tar.gz/m85-0.32.2 ([6] Couldn't resolve host name)', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/skia-bindings-0.33.1/build_support/skia.rs:1235:39
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x561b5c587340 - std::backtrace_rs::backtrace::libunwind::trace::he85dfb3ae4206056
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x561b5c587340 - std::backtrace_rs::backtrace::trace_unsynchronized::h1ad28094d7b00c21
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x561b5c587340 - std::sys_common::backtrace::_print_fmt::h901b54610713cd21
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x561b5c587340 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb0ad78ee1571f7e0
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x561b5c5ae1fc - core::fmt::write::h1857a60b204f1b6a
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/core/src/fmt/mod.rs:1080
[INFO] [stderr]      5:     0x561b5c582ed2 - std::io::Write::write_fmt::hf7b7d7b243f84a36
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/io/mod.rs:1516
[INFO] [stderr]      6:     0x561b5c589cfd - std::sys_common::backtrace::_print::hd093978a5287b8ff
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x561b5c589cfd - std::sys_common::backtrace::print::h20f46787581d56d7
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x561b5c589cfd - std::panicking::default_hook::{{closure}}::h486cbb4b82ffc357
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/panicking.rs:208
[INFO] [stderr]      9:     0x561b5c5899a8 - std::panicking::default_hook::h4190c9e3edd4d591
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/panicking.rs:227
[INFO] [stderr]     10:     0x561b5c58a3e1 - std::panicking::rust_panic_with_hook::h72e78719cdda225c
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/panicking.rs:577
[INFO] [stderr]     11:     0x561b5c589f89 - std::panicking::begin_panic_handler::{{closure}}::h8bd07dbd34150a96
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/panicking.rs:484
[INFO] [stderr]     12:     0x561b5c5877cc - std::sys_common::backtrace::__rust_end_short_backtrace::hdb6b3066ad29028a
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x561b5c589f49 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/panicking.rs:483
[INFO] [stderr]     14:     0x561b5c589efb - std::panicking::begin_panic_fmt::hc19e75fd2b7bc39b
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/panicking.rs:437
[INFO] [stderr]     15:     0x561b5be03aae - build_script_build::build_support::skia::prerequisites::download_dependencies::{{closure}}::h8901273e239e6ea2
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/skia-bindings-0.33.1/build_support/skia.rs:1235
[INFO] [stderr]     16:     0x561b5bdeb635 - core::result::Result<T,E>::unwrap_or_else::h7acf94fe1e402eff
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/core/src/result.rs:825
[INFO] [stderr]     17:     0x561b5be031b2 - build_script_build::build_support::skia::prerequisites::download_dependencies::hdcacaf292dd64ced
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/skia-bindings-0.33.1/build_support/skia.rs:1234
[INFO] [stderr]     18:     0x561b5be0290c - build_script_build::build_support::skia::prerequisites::resolve_dependencies::he028c287e90e7d39
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/skia-bindings-0.33.1/build_support/skia.rs:1185
[INFO] [stderr]     19:     0x561b5bde3006 - build_script_build::build_support::skia::fetch_dependencies::hdc6904dcc94d62c9
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/skia-bindings-0.33.1/build_support/skia.rs:506
[INFO] [stderr]     20:     0x561b5bde2d2e - build_script_build::build_support::skia::build::h416a337df495e029
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/skia-bindings-0.33.1/build_support/skia.rs:480
[INFO] [stderr]     21:     0x561b5be07dc9 - build_script_build::main::h2a3dc2d5da957a75
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/skia-bindings-0.33.1/build.rs:133
[INFO] [stderr]     22:     0x561b5bdf1e4b - core::ops::function::FnOnce::call_once::h29b5cb69862d67c4
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/core/src/ops/function.rs:227
[INFO] [stderr]     23:     0x561b5bdf0cee - std::sys_common::backtrace::__rust_begin_short_backtrace::hcea3505a006c08f0
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     24:     0x561b5be0fe81 - std::rt::lang_start::{{closure}}::h2102ce722018328f
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/rt.rs:66
[INFO] [stderr]     25:     0x561b5c58a8f7 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h5e15f43ce28787f7
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/core/src/ops/function.rs:259
[INFO] [stderr]     26:     0x561b5c58a8f7 - std::panicking::try::do_call::h764f1891769113e9
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/panicking.rs:381
[INFO] [stderr]     27:     0x561b5c58a8f7 - std::panicking::try::h0f2fe4fdd5e0ad19
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/panicking.rs:345
[INFO] [stderr]     28:     0x561b5c58a8f7 - std::panic::catch_unwind::h1634e40dd3a19f80
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/panic.rs:382
[INFO] [stderr]     29:     0x561b5c58a8f7 - std::rt::lang_start_internal::h8d4bc7b854bbd5fe
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/rt.rs:51
[INFO] [stderr]     30:     0x561b5be0fe57 - std::rt::lang_start::h5c9822d64251141c
[INFO] [stderr]                                  at /rustc/f47dd4da3ae8c32c9e65d307bfe640b143e674df/library/std/src/rt.rs:65
[INFO] [stderr]     31:     0x561b5be090ea - main
[INFO] [stderr]     32:     0x7f69610bb0b3 - __libc_start_main
[INFO] [stderr]     33:     0x561b5bdd20be - _start
[INFO] [stderr]     34:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "b57f2a1f2df9e081fb69c9395f8751c7f1e3d24438cd5547ed4d030151f42e4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b57f2a1f2df9e081fb69c9395f8751c7f1e3d24438cd5547ed4d030151f42e4c", kill_on_drop: false }`
[INFO] [stdout] b57f2a1f2df9e081fb69c9395f8751c7f1e3d24438cd5547ed4d030151f42e4c