[INFO] crate serde_rustler 0.1.0 is already in cache
[INFO] testing serde_rustler-0.1.0 against 1.45.2 for beta-1.46-1
[INFO] extracting crate serde_rustler 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate serde_rustler 0.1.0 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_rustler 0.1.0
[INFO] finished tweaking crates.io crate serde_rustler 0.1.0
[INFO] tweaked toml for crates.io crate serde_rustler 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bc0627aa998cf094922aa9a742ae56cc2b7e73c09784c8d4c8d93521772eab80
[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" "bc0627aa998cf094922aa9a742ae56cc2b7e73c09784c8d4c8d93521772eab80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc0627aa998cf094922aa9a742ae56cc2b7e73c09784c8d4c8d93521772eab80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc0627aa998cf094922aa9a742ae56cc2b7e73c09784c8d4c8d93521772eab80", kill_on_drop: false }`
[INFO] [stdout] bc0627aa998cf094922aa9a742ae56cc2b7e73c09784c8d4c8d93521772eab80
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ca447503552b2632b194b7e8a1d0c3e0b34dded3b1c99021b2e312bbddbb9d6
[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" "4ca447503552b2632b194b7e8a1d0c3e0b34dded3b1c99021b2e312bbddbb9d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling gimli v0.22.0
[INFO] [stderr]    Compiling adler v0.2.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling object v0.20.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling rustler_sys v2.1.0
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling addr2line v0.13.0
[INFO] [stderr]    Compiling rustler_codegen v0.21.1
[INFO] [stderr]    Compiling backtrace v0.3.50
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling rustler v0.21.1
[INFO] [stderr] error: failed to run custom build command for `rustler v0.21.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/rustler-6a6cdf69227f6e4f/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at 'expected to find 'erl' executable: Error { inner:    0: failure::backtrace::internal::InternalBacktrace::new
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.8/src/backtrace/internal.rs:46
[INFO] [stderr]    1: failure::backtrace::Backtrace::new
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.8/src/backtrace/mod.rs:121
[INFO] [stderr]    2: failure::context::Context<D>::new
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.8/src/context.rs:84
[INFO] [stderr]    3: <which::error::Error as core::convert::From<which::error::ErrorKind>>::from
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/which-2.0.1/src/error.rs:59
[INFO] [stderr]    4: <T as core::convert::Into<U>>::into
[INFO] [stderr]              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libcore/convert/mod.rs:559
[INFO] [stderr]    5: which::finder::Finder::find
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/which-2.0.1/src/finder.rs:85
[INFO] [stderr]    6: which::which_in
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/which-2.0.1/src/lib.rs:83
[INFO] [stderr]    7: which::which
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/which-2.0.1/src/lib.rs:67
[INFO] [stderr]    8: build_script_build::get_version_from_erl
[INFO] [stderr]              at build.rs:28
[INFO] [stderr]    9: build_script_build::main
[INFO] [stderr]              at build.rs:21
[INFO] [stderr]   10: std::rt::lang_start::{{closure}}
[INFO] [stderr]              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libstd/rt.rs:67
[INFO] [stderr]   11: std::rt::lang_start_internal::{{closure}}
[INFO] [stderr]              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libstd/rt.rs:52
[INFO] [stderr]       std::panicking::try::do_call
[INFO] [stderr]              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libstd/panicking.rs:297
[INFO] [stderr]       std::panicking::try
[INFO] [stderr]              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libstd/panicking.rs:274
[INFO] [stderr]       std::panic::catch_unwind
[INFO] [stderr]              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libstd/panic.rs:394
[INFO] [stderr]       std::rt::lang_start_internal
[INFO] [stderr]              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libstd/rt.rs:51
[INFO] [stderr]   12: std::rt::lang_start
[INFO] [stderr]              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libstd/rt.rs:67
[INFO] [stderr]   13: main
[INFO] [stderr]   14: __libc_start_main
[INFO] [stderr]   15: _start
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] Cannot find binary path }', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustler-0.21.1/build.rs:28:15
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x5584891e3975 - backtrace::backtrace::libunwind::trace::ha215bbf14e328799
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
[INFO] [stderr]    1:     0x5584891e3975 - backtrace::backtrace::trace_unsynchronized::h3384b099b135857a
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x5584891e3975 - std::sys_common::backtrace::_print_fmt::hfec93740f7294682
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:78
[INFO] [stderr]    3:     0x5584891e3975 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h5fe20777f4174074
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]    4:     0x55848920681c - core::fmt::write::he14c3177144df275
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1076
[INFO] [stderr]    5:     0x5584891e0e63 - std::io::Write::write_fmt::h8e26323bfab8bcc5
[INFO] [stderr]                                at src/libstd/io/mod.rs:1537
[INFO] [stderr]    6:     0x5584891e5ed0 - std::sys_common::backtrace::_print::h9cfa4c87526ba064
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:62
[INFO] [stderr]    7:     0x5584891e5ed0 - std::sys_common::backtrace::print::h94936584848b3272
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]    8:     0x5584891e5ed0 - std::panicking::default_hook::{{closure}}::h733b20cc9b496e46
[INFO] [stderr]                                at src/libstd/panicking.rs:198
[INFO] [stderr]    9:     0x5584891e5c1c - std::panicking::default_hook::h556d8cff6c12a651
[INFO] [stderr]                                at src/libstd/panicking.rs:218
[INFO] [stderr]   10:     0x5584891e6507 - std::panicking::rust_panic_with_hook::ha0c7ca5b39baa9d5
[INFO] [stderr]                                at src/libstd/panicking.rs:486
[INFO] [stderr]   11:     0x5584891e610b - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:388
[INFO] [stderr]   12:     0x558489205c21 - core::panicking::panic_fmt::h106d7128cbbc7cd2
[INFO] [stderr]                                at src/libcore/panicking.rs:101
[INFO] [stderr]   13:     0x558489205a43 - core::option::expect_none_failed::hfcafefc70a7975bb
[INFO] [stderr]                                at src/libcore/option.rs:1272
[INFO] [stderr]   14:     0x5584890fff58 - core::result::Result<T,E>::expect::h5e261d48bd97d24d
[INFO] [stderr]                                at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libcore/result.rs:963
[INFO] [stderr]   15:     0x55848910b4d3 - build_script_build::get_version_from_erl::h1dc4e3dab9c79ead
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustler-0.21.1/build.rs:28
[INFO] [stderr]   16:     0x55848910b364 - build_script_build::main::h046d060c047cf323
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustler-0.21.1/build.rs:21
[INFO] [stderr]   17:     0x558489107c3b - std::rt::lang_start::{{closure}}::he66591a397314fa9
[INFO] [stderr]                                at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libstd/rt.rs:67
[INFO] [stderr]   18:     0x5584891e68d8 - std::rt::lang_start_internal::{{closure}}::hefb489d56a389b75
[INFO] [stderr]                                at src/libstd/rt.rs:52
[INFO] [stderr]   19:     0x5584891e68d8 - std::panicking::try::do_call::hb2bfa58b743656f1
[INFO] [stderr]                                at src/libstd/panicking.rs:297
[INFO] [stderr]   20:     0x5584891e68d8 - std::panicking::try::haaa85a89ce3784c3
[INFO] [stderr]                                at src/libstd/panicking.rs:274
[INFO] [stderr]   21:     0x5584891e68d8 - std::panic::catch_unwind::h49baa277f74e60cb
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   22:     0x5584891e68d8 - std::rt::lang_start_internal::h7aa2f6739b31fe58
[INFO] [stderr]                                at src/libstd/rt.rs:51
[INFO] [stderr]   23:     0x558489107c17 - std::rt::lang_start::hba96c7a233a4bb68
[INFO] [stderr]                                at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libstd/rt.rs:67
[INFO] [stderr]   24:     0x55848910bd6a - main
[INFO] [stderr]   25:     0x7fd6332b80b3 - __libc_start_main
[INFO] [stderr]   26:     0x5584890fc18e - _start
[INFO] [stderr]   27:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `Command { std: "docker" "inspect" "4ca447503552b2632b194b7e8a1d0c3e0b34dded3b1c99021b2e312bbddbb9d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ca447503552b2632b194b7e8a1d0c3e0b34dded3b1c99021b2e312bbddbb9d6", kill_on_drop: false }`
[INFO] [stdout] 4ca447503552b2632b194b7e8a1d0c3e0b34dded3b1c99021b2e312bbddbb9d6