[INFO] cloning repository https://github.com/StephenCathcart/rust-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/StephenCathcart/rust-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStephenCathcart%2Frust-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStephenCathcart%2Frust-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e58a791dd100dd1555e353ad2c615da6bc9498e4
[INFO] checking StephenCathcart/rust-practice against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStephenCathcart%2Frust-practice" "/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/StephenCathcart/rust-practice on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/StephenCathcart/rust-practice
[INFO] finished tweaking git repo https://github.com/StephenCathcart/rust-practice
[INFO] tweaked toml for git repo https://github.com/StephenCathcart/rust-practice written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/StephenCathcart/rust-practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 89b99727396f6acaeb38c2c7558c3efc7eaa8def104470f687ce25e9857b7cde
[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" "89b99727396f6acaeb38c2c7558c3efc7eaa8def104470f687ce25e9857b7cde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "89b99727396f6acaeb38c2c7558c3efc7eaa8def104470f687ce25e9857b7cde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89b99727396f6acaeb38c2c7558c3efc7eaa8def104470f687ce25e9857b7cde", kill_on_drop: false }`
[INFO] [stdout] 89b99727396f6acaeb38c2c7558c3efc7eaa8def104470f687ce25e9857b7cde
[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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18c2cbb6788b6f9a19570712bf196c396e0a4f68d9714046b05c0b62844157e5
[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" "18c2cbb6788b6f9a19570712bf196c396e0a4f68d9714046b05c0b62844157e5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling cc v1.0.59
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling pkg-config v0.3.18
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking object v0.20.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling xml-rs v0.8.3
[INFO] [stderr]    Compiling libloading v0.6.3
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking downcast-rs v1.2.0
[INFO] [stderr]    Compiling core-foundation-sys v0.6.2
[INFO] [stderr]     Checking xdg v2.2.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling gfx-backend-metal v0.3.3
[INFO] [stderr]     Checking copyless v0.1.5
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[INFO] [stderr]     Checking range-alloc v0.1.1
[INFO] [stderr]     Checking mint v0.5.5
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling inventory v0.1.8
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]     Checking bytemuck v1.4.0
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking xi-unicode v0.2.1
[INFO] [stderr]     Checking hound v3.4.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking float-ord v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking miniz_oxide v0.4.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]     Checking matrixmultiply v0.2.3
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling unic-langid-impl v0.8.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr] error: failed to run custom build command for `gfx-backend-metal v0.3.3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/gfx-backend-metal-869cc646af5421c1/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'unsupported target x86_64-unknown-linux-gnu', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gfx-backend-metal-0.3.3/build.rs:17:9
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5624b34fdb70 - std::backtrace_rs::backtrace::libunwind::trace::h452faf99f32e7c93
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x5624b34fdb70 - std::backtrace_rs::backtrace::trace_unsynchronized::he40edc71437667a1
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x5624b34fdb70 - std::sys_common::backtrace::_print_fmt::h6c51d6ade71f46bf
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x5624b34fdb70 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3cd15d7003dec37a
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x5624b351ae6c - core::fmt::write::h1857a60b204f1b6a
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/core/src/fmt/mod.rs:1080
[INFO] [stderr]      5:     0x5624b34fb577 - std::io::Write::write_fmt::hac61caff894c35ae
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/io/mod.rs:1517
[INFO] [stderr]      6:     0x5624b34ffc80 - std::sys_common::backtrace::_print::haa2f390fb7957e3e
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x5624b34ffc80 - std::sys_common::backtrace::print::h48c7cbbad9013bb1
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x5624b34ffc80 - std::panicking::default_hook::{{closure}}::h8b7ff05a31e71d55
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/panicking.rs:208
[INFO] [stderr]      9:     0x5624b34ff9cc - std::panicking::default_hook::h2f00c78800d98e4c
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/panicking.rs:227
[INFO] [stderr]     10:     0x5624b35002e3 - std::panicking::rust_panic_with_hook::h4eaa635e4694aef3
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/panicking.rs:577
[INFO] [stderr]     11:     0x5624b34ffeb9 - std::panicking::begin_panic_handler::{{closure}}::hec242f1b136b5ff2
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/panicking.rs:484
[INFO] [stderr]     12:     0x5624b34fdfdc - std::sys_common::backtrace::__rust_end_short_backtrace::h1f3cc383ee6c0374
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x5624b34ffe79 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/panicking.rs:483
[INFO] [stderr]     14:     0x5624b34ffe2b - std::panicking::begin_panic_fmt::hebfdcd945bbd27b1
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/panicking.rs:437
[INFO] [stderr]     15:     0x5624b34d988a - build_script_build::main::hc229ed19b35cb92a
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gfx-backend-metal-0.3.3/build.rs:17
[INFO] [stderr]     16:     0x5624b34dcbab - core::ops::function::FnOnce::call_once::h0fcf89d47f1e0384
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/core/src/ops/function.rs:227
[INFO] [stderr]     17:     0x5624b34e467e - std::sys_common::backtrace::__rust_begin_short_backtrace::h34e6fda3f60495d9
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     18:     0x5624b34e72c1 - std::rt::lang_start::{{closure}}::h3e2fb27e90ef950c
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/rt.rs:66
[INFO] [stderr]     19:     0x5624b35006e1 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hecc21eb9018cc197
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/core/src/ops/function.rs:259
[INFO] [stderr]     20:     0x5624b35006e1 - std::panicking::try::do_call::h174ad655d084b5c7
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/panicking.rs:381
[INFO] [stderr]     21:     0x5624b35006e1 - std::panicking::try::h479e6054ce28de10
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/panicking.rs:345
[INFO] [stderr]     22:     0x5624b35006e1 - std::panic::catch_unwind::hb558ddea2b3e9c45
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/panic.rs:382
[INFO] [stderr]     23:     0x5624b35006e1 - std::rt::lang_start_internal::h163149047f0a8b61
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/rt.rs:51
[INFO] [stderr]     24:     0x5624b34e7297 - std::rt::lang_start::hf33369facaa242c9
[INFO] [stderr]                                  at /rustc/72f88fc4e9458f89516a0b8b0868f3718aec5b47/library/std/src/rt.rs:65
[INFO] [stderr]     25:     0x5624b34dae4a - main
[INFO] [stderr]     26:     0x7fc01d1190b3 - __libc_start_main
[INFO] [stderr]     27:     0x5624b34d80ae - _start
[INFO] [stderr]     28:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "18c2cbb6788b6f9a19570712bf196c396e0a4f68d9714046b05c0b62844157e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18c2cbb6788b6f9a19570712bf196c396e0a4f68d9714046b05c0b62844157e5", kill_on_drop: false }`
[INFO] [stdout] 18c2cbb6788b6f9a19570712bf196c396e0a4f68d9714046b05c0b62844157e5
