[INFO] fetching crate avr-libc 0.2.0...
[INFO] checking avr-libc-0.2.0 against try#b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f for pr-76104
[INFO] extracting crate avr-libc 0.2.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate avr-libc 0.2.0 on toolchain b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate avr-libc 0.2.0
[INFO] finished tweaking crates.io crate avr-libc 0.2.0
[INFO] tweaked toml for crates.io crate avr-libc 0.2.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate avr-libc 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bindgen v0.54.1
[INFO] [stderr]   Downloaded avr-mcu v0.3.3
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab753d3015d6584280f8a90211c95cf1ded60cb6fb90b630259538d06d7c6d27
[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" "ab753d3015d6584280f8a90211c95cf1ded60cb6fb90b630259538d06d7c6d27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab753d3015d6584280f8a90211c95cf1ded60cb6fb90b630259538d06d7c6d27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab753d3015d6584280f8a90211c95cf1ded60cb6fb90b630259538d06d7c6d27", kill_on_drop: false }`
[INFO] [stdout] ab753d3015d6584280f8a90211c95cf1ded60cb6fb90b630259538d06d7c6d27
[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=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" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 312c4a36add11c0326d92509215d1f8f96c600dffbd21e99b06f4272a8a1f7f3
[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" "312c4a36add11c0326d92509215d1f8f96c600dffbd21e99b06f4272a8a1f7f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]    Compiling cc v1.0.58
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling json v0.12.4
[INFO] [stderr]    Compiling bindgen v0.54.1
[INFO] [stderr]    Compiling xml-rs v0.8.3
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling target-cpu-fetch v0.1.1
[INFO] [stderr]    Compiling xmltree v0.10.1
[INFO] [stderr]    Compiling avr-mcu v0.3.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling clap v2.33.1
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling avr-libc v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `avr-libc v0.2.0 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/avr-libc-069a30d2d7ae29be/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-0.3.3/src/load.rs:54:10
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5588327bf620 - std::backtrace_rs::backtrace::libunwind::trace::h14e81b0c16b543a7
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x5588327bf620 - std::backtrace_rs::backtrace::trace_unsynchronized::hc9e39e172835ff32
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x5588327bf620 - std::sys_common::backtrace::_print_fmt::h31994df1c8c77b8f
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x5588327bf620 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he74e98acff43ec99
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x5588327e50ac - core::fmt::write::h1857a60b204f1b6a
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/fmt/mod.rs:1080
[INFO] [stderr]      5:     0x5588327bbce7 - std::io::Write::write_fmt::hea6289e6649ff508
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/io/mod.rs:1517
[INFO] [stderr]      6:     0x5588327c1a90 - std::sys_common::backtrace::_print::h8cc65937fea24014
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x5588327c1a90 - std::sys_common::backtrace::print::hff6a0ebb96535e34
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x5588327c1a90 - std::panicking::default_hook::{{closure}}::h71b9700c5dda1b1d
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:208
[INFO] [stderr]      9:     0x5588327c17dc - std::panicking::default_hook::h0c46e634c06c69b6
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:227
[INFO] [stderr]     10:     0x5588327c20f3 - std::panicking::rust_panic_with_hook::he52576a0c2093334
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:577
[INFO] [stderr]     11:     0x5588327c1cc9 - std::panicking::begin_panic_handler::{{closure}}::h411c800b810762b2
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:484
[INFO] [stderr]     12:     0x5588327bfaac - std::sys_common::backtrace::__rust_end_short_backtrace::ha657a272019e6aad
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x5588327c1c89 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:483
[INFO] [stderr]     14:     0x5588327e36b1 - core::panicking::panic_fmt::hb15d6f55e8472f62
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/panicking.rs:85
[INFO] [stderr]     15:     0x5588327e3443 - core::option::expect_failed::h6bc6a05976f4cb88
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/option.rs:1213
[INFO] [stderr]     16:     0x5588321ef2bb - core::option::Option<T>::expect::h73ccef00854e7e46
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/option.rs:333
[INFO] [stderr]     17:     0x5588321f2d22 - avr_mcu::load::microcontroller::h5d9597b7b6de3957
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-mcu-0.3.3/src/load.rs:50
[INFO] [stderr]     18:     0x5588321f3bde - avr_mcu::current::mcu::{{closure}}::h76d80c62fe997182
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-mcu-0.3.3/src/current.rs:13
[INFO] [stderr]     19:     0x5588321ee3c8 - core::option::Option<T>::map::h0ceda42eb7341b38
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/option.rs:437
[INFO] [stderr]     20:     0x5588321f3b7f - avr_mcu::current::mcu::h673686c1e30659e7
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/avr-mcu-0.3.3/src/current.rs:13
[INFO] [stderr]     21:     0x5588321cd8f1 - <build_script_build::MCU as core::ops::deref::Deref>::deref::__static_ref_initialize::hd38d9424d53dd487
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:31
[INFO] [stderr]     22:     0x5588321cd8f1 - core::ops::function::FnOnce::call_once::h7eb46aff7edadc9f
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/ops/function.rs:227
[INFO] [stderr]     23:     0x5588321cde64 - lazy_static::lazy::Lazy<T>::get::{{closure}}::hb45774eb1be3dac7
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.4.0/src/inline_lazy.rs:31
[INFO] [stderr]     24:     0x5588321cfbfc - std::sync::once::Once::call_once::{{closure}}::ha563b54f59a9b408
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sync/once.rs:269
[INFO] [stderr]     25:     0x5588327bf015 - std::sync::once::Once::call_inner::hb023ba1b301af7da
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sync/once.rs:425
[INFO] [stderr]     26:     0x5588321cfb81 - std::sync::once::Once::call_once::h7f6a304d9e7c4deb
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sync/once.rs:269
[INFO] [stderr]     27:     0x5588321cc8d7 - lazy_static::lazy::Lazy<T>::get::hacf319320b931da1
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.4.0/src/inline_lazy.rs:30
[INFO] [stderr]     28:     0x5588321cc8d7 - <build_script_build::MCU as core::ops::deref::Deref>::deref::__stability::hd10d0a49f1dbb423
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.4.0/src/lib.rs:142
[INFO] [stderr]     29:     0x5588321cc8d7 - <build_script_build::MCU as core::ops::deref::Deref>::deref::haf676ee3290b7d64
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.4.0/src/lib.rs:144
[INFO] [stderr]     30:     0x5588321ca206 - build_script_build::main::h0d00190dacf26cec
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:42
[INFO] [stderr]     31:     0x5588321cd8db - core::ops::function::FnOnce::call_once::h7d3648cf47f46e7e
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/ops/function.rs:227
[INFO] [stderr]     32:     0x5588321cdeae - std::sys_common::backtrace::__rust_begin_short_backtrace::h9cfcf75b4b79a1b7
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     33:     0x5588321cd361 - std::rt::lang_start::{{closure}}::h5705077ef478c4f6
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/rt.rs:66
[INFO] [stderr]     34:     0x5588327c24f1 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h009d20b8a620bf60
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/core/src/ops/function.rs:259
[INFO] [stderr]     35:     0x5588327c24f1 - std::panicking::try::do_call::h09431c39e2107c90
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:381
[INFO] [stderr]     36:     0x5588327c24f1 - std::panicking::try::he27cf60b958af343
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panicking.rs:345
[INFO] [stderr]     37:     0x5588327c24f1 - std::panic::catch_unwind::h7b646b0041dc5591
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/panic.rs:382
[INFO] [stderr]     38:     0x5588327c24f1 - std::rt::lang_start_internal::hdad6c98af1e4747e
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/rt.rs:51
[INFO] [stderr]     39:     0x5588321cd337 - std::rt::lang_start::h65a9790e6ae307f3
[INFO] [stderr]                                  at /rustc/b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f/library/std/src/rt.rs:65
[INFO] [stderr]     40:     0x5588321cc96a - main
[INFO] [stderr]     41:     0x7f588bb8a0b3 - __libc_start_main
[INFO] [stderr]     42:     0x5588321ca0ce - _start
[INFO] [stderr]     43:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "312c4a36add11c0326d92509215d1f8f96c600dffbd21e99b06f4272a8a1f7f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "312c4a36add11c0326d92509215d1f8f96c600dffbd21e99b06f4272a8a1f7f3", kill_on_drop: false }`
[INFO] [stdout] 312c4a36add11c0326d92509215d1f8f96c600dffbd21e99b06f4272a8a1f7f3