[INFO] fetching crate avr-libc 0.2.1...
[INFO] checking avr-libc-0.2.1 against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] extracting crate avr-libc 0.2.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate avr-libc 0.2.1 on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate avr-libc 0.2.1
[INFO] finished tweaking crates.io crate avr-libc 0.2.1
[INFO] tweaked toml for crates.io crate avr-libc 0.2.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate avr-libc 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7479fdb26dee37da46c6f6d3a364a709f75b2becd2e02f5c6fa829788fb51be3
[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" "7479fdb26dee37da46c6f6d3a364a709f75b2becd2e02f5c6fa829788fb51be3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7479fdb26dee37da46c6f6d3a364a709f75b2becd2e02f5c6fa829788fb51be3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7479fdb26dee37da46c6f6d3a364a709f75b2becd2e02f5c6fa829788fb51be3", kill_on_drop: false }`
[INFO] [stdout] 7479fdb26dee37da46c6f6d3a364a709f75b2becd2e02f5c6fa829788fb51be3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--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] 462061a58df5fec9a0d5e48a8f6f81d6ebbbe7f3e270b1d54a327aace53e3249
[INFO] running `Command { std: "docker" "start" "-a" "462061a58df5fec9a0d5e48a8f6f81d6ebbbe7f3e270b1d54a327aace53e3249", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.78
[INFO] [stderr]    Compiling libloading v0.6.3
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling json v0.12.4
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling clang-sys v1.0.0
[INFO] [stderr]    Compiling xmltree v0.10.1
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling target-cpu-fetch v0.1.1
[INFO] [stderr]    Compiling bindgen v0.55.1
[INFO] [stderr]    Compiling avr-mcu v0.3.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling clap v2.33.3
[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 avr-libc v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `avr-libc v0.2.1 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/avr-libc-e0f1e31435ae76e3/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   [warning]: cannot find target JSON file 'x86_64-unknown-linux-gnu.json' - due to limitations it needs to be in the crate root - is it?
[INFO] [stderr]   [warning]: assuming a target CPU name of 'x86_64-unknown-linux-gnu' from the file name of the target spec JSON file
[INFO] [stderr]   thread 'main' panicked at 'no microcontroller with the name 'x86_64-unknown-linux-gnu' found', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-mcu-0.3.4/src/load.rs:54:10
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55593e9861c0 - std::backtrace_rs::backtrace::libunwind::trace::h746c3e9529d524bc
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55593e9861c0 - std::backtrace_rs::backtrace::trace_unsynchronized::h86340908ff889faa
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55593e9861c0 - std::sys_common::backtrace::_print_fmt::h43f85f9b18230404
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55593e9861c0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hc132ae1a5b5aa7cd
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55593e9ac6cc - core::fmt::write::hdf023a0036d2a25f
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/fmt/mod.rs:1078:17
[INFO] [stderr]      5:     0x55593e982212 - std::io::Write::write_fmt::h8580846154bcb66a
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/io/mod.rs:1519:15
[INFO] [stderr]      6:     0x55593e988435 - std::sys_common::backtrace::_print::h7ee55fed88d107a3
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55593e988435 - std::sys_common::backtrace::print::h54a7d3e52a524177
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55593e988435 - std::panicking::default_hook::{{closure}}::h60921e857bf55a40
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x55593e987f8a - std::panicking::default_hook::hf0f9afb1017317fc
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x55593e988bd1 - std::panicking::rust_panic_with_hook::h8d66bf42b407aaea
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x55593e988717 - std::panicking::begin_panic_handler::{{closure}}::hde71edcd925d0c5e
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:497:13
[INFO] [stderr]     12:     0x55593e98667c - std::sys_common::backtrace::__rust_end_short_backtrace::h8a3c7d6cea578919
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55593e988679 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x55593e9aada1 - core::panicking::panic_fmt::h20225113c4a2f8fd
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x55593e9aab33 - core::option::expect_failed::h8be1ca96ca0d69ca
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/option.rs:1260:5
[INFO] [stderr]     16:     0x55593e3a2f0e - core::option::Option<T>::expect::h8978b5c113623c10
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/option.rs:349:21
[INFO] [stderr]     17:     0x55593e3a65a6 - avr_mcu::load::microcontroller::h1d821ea3f418788d
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-mcu-0.3.4/src/load.rs:50:21
[INFO] [stderr]     18:     0x55593e3a74a2 - avr_mcu::current::mcu::{{closure}}::hc4f98c10c1ce0b99
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-mcu-0.3.4/src/current.rs:13:31
[INFO] [stderr]     19:     0x55593e3a2b95 - core::option::Option<T>::map::hc742a812c9476638
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/option.rs:453:29
[INFO] [stderr]     20:     0x55593e3a744f - avr_mcu::current::mcu::h3bf04882b2a5743b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-mcu-0.3.4/src/current.rs:13:5
[INFO] [stderr]     21:     0x55593e3825f1 - <build_script_build::MCU as core::ops::deref::Deref>::deref::__static_ref_initialize::ha931500bcae66a3c
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:31:35
[INFO] [stderr]     22:     0x55593e3825f1 - core::ops::function::FnOnce::call_once::hf50902c58de9aa0f
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     23:     0x55593e382cd4 - lazy_static::lazy::Lazy<T>::get::{{closure}}::h818b1f509e8edb8e
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.4.0/src/inline_lazy.rs:31:29
[INFO] [stderr]     24:     0x55593e384c5c - std::sync::once::Once::call_once::{{closure}}::hdab80cc6f8923f80
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sync/once.rs:261:41
[INFO] [stderr]     25:     0x55593e985c72 - std::sync::once::Once::call_inner::hd35c7f7eb6ec0c08
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sync/once.rs:419:21
[INFO] [stderr]     26:     0x55593e384bd5 - std::sync::once::Once::call_once::h0f5148f3f49b147e
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sync/once.rs:261:9
[INFO] [stderr]     27:     0x55593e3817f7 - lazy_static::lazy::Lazy<T>::get::h2429425375b88bf1
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.4.0/src/inline_lazy.rs:30:9
[INFO] [stderr]     28:     0x55593e3817f7 - <build_script_build::MCU as core::ops::deref::Deref>::deref::__stability::h6bf699611f80fbd6
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.4.0/src/lib.rs:142:21
[INFO] [stderr]     29:     0x55593e3817f7 - <build_script_build::MCU as core::ops::deref::Deref>::deref::h4a9d9f3695a6bad0
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.4.0/src/lib.rs:144:17
[INFO] [stderr]     30:     0x55593e37f1f6 - build_script_build::main::hbf5c37d3fbf33caf
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:42:8
[INFO] [stderr]     31:     0x55593e38259b - core::ops::function::FnOnce::call_once::h4d36fa58109c566e
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     32:     0x55593e382d1e - std::sys_common::backtrace::__rust_begin_short_backtrace::h97dd32f247d9c0a9
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     33:     0x55593e3821d1 - std::rt::lang_start::{{closure}}::hc96522b45b410375
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/rt.rs:66:18
[INFO] [stderr]     34:     0x55593e988ff7 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h54c39b9b8451875a
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     35:     0x55593e988ff7 - std::panicking::try::do_call::hcdfba51a06e21b42
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:379:40
[INFO] [stderr]     36:     0x55593e988ff7 - std::panicking::try::hb36953ccd24f930d
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:343:19
[INFO] [stderr]     37:     0x55593e988ff7 - std::panic::catch_unwind::hbb374cd03beb3824
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panic.rs:396:14
[INFO] [stderr]     38:     0x55593e988ff7 - std::rt::lang_start_internal::h97dca9624db2aa85
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/rt.rs:51:25
[INFO] [stderr]     39:     0x55593e3821a7 - std::rt::lang_start::h1d5054aeb0c1fb2b
[INFO] [stderr]                                  at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/rt.rs:65:5
[INFO] [stderr]     40:     0x55593e38188a - main
[INFO] [stderr]     41:     0x7fd6517a50b3 - __libc_start_main
[INFO] [stderr]     42:     0x55593e37f0be - _start
[INFO] [stderr]     43:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "462061a58df5fec9a0d5e48a8f6f81d6ebbbe7f3e270b1d54a327aace53e3249", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "462061a58df5fec9a0d5e48a8f6f81d6ebbbe7f3e270b1d54a327aace53e3249", kill_on_drop: false }`
[INFO] [stdout] 462061a58df5fec9a0d5e48a8f6f81d6ebbbe7f3e270b1d54a327aace53e3249