[INFO] crate ubpf-sys 0.1.1 is already in cache
[INFO] checking ubpf-sys-0.1.1 against master#4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb for pr-64672
[INFO] extracting crate ubpf-sys 0.1.1 into work/builds/worker-0/source
[INFO] validating manifest of crates.io crate ubpf-sys 0.1.1 on toolchain 4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ubpf-sys 0.1.1
[INFO] finished tweaking crates.io crate ubpf-sys 0.1.1
[INFO] tweaked toml for crates.io crate ubpf-sys 0.1.1 written to work/builds/worker-0/source/Cargo.toml
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0b935e0d33e2b0525a65aa8085042aef1d85d61a0a1cae7339a01452083da490
[INFO] running `"docker" "start" "-a" "0b935e0d33e2b0525a65aa8085042aef1d85d61a0a1cae7339a01452083da490"`
[INFO] [stderr]    Compiling ubpf-sys v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `ubpf-sys v0.1.1 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/ubpf-sys-69b50aaa2f5a3a20/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at 'Please specify CROSS_COMPILE=x86_64-linux-musl- cargo build --target=x86_64-unknown-linux-musl as the 'cc' crate incorrectly looks for musl-gcc', src/build.rs:20:3
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x55a231032df4 - backtrace::backtrace::libunwind::trace::h837858cfeddf7a26
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x55a231032df4 - backtrace::backtrace::trace_unsynchronized::hf450b231b66758d5
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x55a231032df4 - std::sys_common::backtrace::_print_fmt::h368e3c833d23dd1d
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:76
[INFO] [stderr]    3:     0x55a231032df4 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h99a560994a9a8770
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:60
[INFO] [stderr]    4:     0x55a231050a3c - core::fmt::write::h331a8aee5b7f3512
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1030
[INFO] [stderr]    5:     0x55a2310306a7 - std::io::Write::write_fmt::hf05660e3e7df1eca
[INFO] [stderr]                                at src/libstd/io/mod.rs:1412
[INFO] [stderr]    6:     0x55a231035175 - std::sys_common::backtrace::_print::h2a131efc4c0ac3fa
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:64
[INFO] [stderr]    7:     0x55a231035175 - std::sys_common::backtrace::print::h983d88dd719c12ff
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]    8:     0x55a231035175 - std::panicking::default_hook::{{closure}}::h663d5da304a5132f
[INFO] [stderr]                                at src/libstd/panicking.rs:196
[INFO] [stderr]    9:     0x55a231034e66 - std::panicking::default_hook::hf37841c3986e6801
[INFO] [stderr]                                at src/libstd/panicking.rs:210
[INFO] [stderr]   10:     0x55a2310357c5 - std::panicking::rust_panic_with_hook::hb2227d83b88686af
[INFO] [stderr]                                at src/libstd/panicking.rs:473
[INFO] [stderr]   11:     0x55a2310232bf - std::panicking::begin_panic::h12fe8d6b1c2ddf8c
[INFO] [stderr]                                at /rustc/4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb/src/libstd/panicking.rs:407
[INFO] [stderr]   12:     0x55a231028842 - build_script_build::tool::h07224204e6d2da9f
[INFO] [stderr]                                at src/build.rs:20
[INFO] [stderr]   13:     0x55a23102867b - build_script_build::main::he77c8da673d5432e
[INFO] [stderr]                                at src/build.rs:13
[INFO] [stderr]   14:     0x55a23101f570 - std::rt::lang_start::{{closure}}::h2d13a80e0295353c
[INFO] [stderr]                                at /rustc/4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb/src/libstd/rt.rs:64
[INFO] [stderr]   15:     0x55a231035243 - std::rt::lang_start_internal::{{closure}}::hcbc0d39047dfb53e
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   16:     0x55a231035243 - std::panicking::try::do_call::h8b5ef32d822a8d8f
[INFO] [stderr]                                at src/libstd/panicking.rs:292
[INFO] [stderr]   17:     0x55a23103b36a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   18:     0x55a231035cbd - std::panicking::try::h9b6fb4e6a40ce0cb
[INFO] [stderr]                                at src/libstd/panicking.rs:271
[INFO] [stderr]   19:     0x55a231035cbd - std::panic::catch_unwind::h2fbf9b8ead8e504a
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   20:     0x55a231035cbd - std::rt::lang_start_internal::hb6581c1f21bf501d
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   21:     0x55a23101f549 - std::rt::lang_start::h73cc45b9cf1f785f
[INFO] [stderr]                                at /rustc/4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb/src/libstd/rt.rs:64
[INFO] [stderr]   22:     0x55a2310292ea - main
[INFO] [stderr]   23:     0x7f02a219fb97 - __libc_start_main
[INFO] [stderr]   24:     0x55a23101c37a - _start
[INFO] [stderr]   25:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "0b935e0d33e2b0525a65aa8085042aef1d85d61a0a1cae7339a01452083da490"`
[INFO] running `"docker" "rm" "-f" "0b935e0d33e2b0525a65aa8085042aef1d85d61a0a1cae7339a01452083da490"`
[INFO] [stdout] 0b935e0d33e2b0525a65aa8085042aef1d85d61a0a1cae7339a01452083da490