[INFO] fetching crate bridge_lmdb 0.1.0...
[INFO] testing bridge_lmdb-0.1.0 against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] extracting crate bridge_lmdb 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate bridge_lmdb 0.1.0 on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bridge_lmdb 0.1.0
[INFO] finished tweaking crates.io crate bridge_lmdb 0.1.0
[INFO] tweaked toml for crates.io crate bridge_lmdb 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", 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] 6f89ad7ebd882a1dc5ca5ba748c8d42db945abd2a5f13aa8057789f733cd12fc
[INFO] running `Command { std: "docker" "start" "-a" "6f89ad7ebd882a1dc5ca5ba748c8d42db945abd2a5f13aa8057789f733cd12fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f89ad7ebd882a1dc5ca5ba748c8d42db945abd2a5f13aa8057789f733cd12fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f89ad7ebd882a1dc5ca5ba748c8d42db945abd2a5f13aa8057789f733cd12fc", kill_on_drop: false }`
[INFO] [stdout] 6f89ad7ebd882a1dc5ca5ba748c8d42db945abd2a5f13aa8057789f733cd12fc
[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=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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--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] ca467f4bdfa752c7ccb9d08e4a1d93fb52cbefb141e8c7999f72c69efc46cc2f
[INFO] running `Command { std: "docker" "start" "-a" "ca467f4bdfa752c7ccb9d08e4a1d93fb52cbefb141e8c7999f72c69efc46cc2f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling rustler_sys v2.1.0
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling backtrace v0.3.50
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling liblmdb-sys v0.2.2
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling quote v0.6.13
[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-7b0800306e5778ab/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/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/src/libcore/convert/mod.rs:563
[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/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/src/libstd/rt.rs:67
[INFO] [stderr]     11: std::rt::lang_start_internal::{{closure}}
[INFO] [stderr]                at /rustc/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/src/libstd/rt.rs:52
[INFO] [stderr]         std::panicking::try::do_call
[INFO] [stderr]                at /rustc/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/src/libstd/panicking.rs:348
[INFO] [stderr]         std::panicking::try
[INFO] [stderr]                at /rustc/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/src/libstd/panicking.rs:325
[INFO] [stderr]         std::panic::catch_unwind
[INFO] [stderr]                at /rustc/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/src/libstd/panic.rs:394
[INFO] [stderr]         std::rt::lang_start_internal
[INFO] [stderr]                at /rustc/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/src/libstd/rt.rs:51
[INFO] [stderr]     12: std::rt::lang_start
[INFO] [stderr]                at /rustc/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/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:28:28
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x560b34380b05 - backtrace::backtrace::libunwind::trace::hea89dfbbfe67f40d
[INFO] [stderr]                                  at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
[INFO] [stderr]      1:     0x560b34380b05 - backtrace::backtrace::trace_unsynchronized::h0513dd713d7644d4
[INFO] [stderr]                                  at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x560b34380b05 - std::sys_common::backtrace::_print_fmt::h040abae64e4a24a9
[INFO] [stderr]                                  at src/libstd/sys_common/backtrace.rs:78
[INFO] [stderr]      3:     0x560b34380b05 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb4bdb37c3c335733
[INFO] [stderr]                                  at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]      4:     0x560b343a37cc - core::fmt::write::h540ac4a6a1232abc
[INFO] [stderr]                                  at src/libcore/fmt/mod.rs:1076
[INFO] [stderr]      5:     0x560b3437df92 - std::io::Write::write_fmt::h5ffa1b5a7703af47
[INFO] [stderr]                                  at src/libstd/io/mod.rs:1539
[INFO] [stderr]      6:     0x560b34382f90 - std::sys_common::backtrace::_print::hb55cc635eaf1882e
[INFO] [stderr]                                  at src/libstd/sys_common/backtrace.rs:62
[INFO] [stderr]      7:     0x560b34382f90 - std::sys_common::backtrace::print::h2b2218fa55714084
[INFO] [stderr]                                  at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]      8:     0x560b34382f90 - std::panicking::default_hook::{{closure}}::h578517c025765cf3
[INFO] [stderr]                                  at src/libstd/panicking.rs:198
[INFO] [stderr]      9:     0x560b34382cdc - std::panicking::default_hook::h4cafc94c2fc640fb
[INFO] [stderr]                                  at src/libstd/panicking.rs:217
[INFO] [stderr]     10:     0x560b343835d3 - std::panicking::rust_panic_with_hook::h3eeb5001beeca5c3
[INFO] [stderr]                                  at src/libstd/panicking.rs:526
[INFO] [stderr]     11:     0x560b343831cb - rust_begin_unwind
[INFO] [stderr]                                  at src/libstd/panicking.rs:437
[INFO] [stderr]     12:     0x560b343a2bd1 - core::panicking::panic_fmt::h78830ea6a34e7206
[INFO] [stderr]                                  at src/libcore/panicking.rs:85
[INFO] [stderr]     13:     0x560b343a29f3 - core::option::expect_none_failed::hf79bbb5ca7e09e08
[INFO] [stderr]                                  at src/libcore/option.rs:1269
[INFO] [stderr]     14:     0x560b342a8d28 - core::result::Result<T,E>::expect::h8fbf2d501c276335
[INFO] [stderr]                                  at /rustc/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/src/libcore/result.rs:963
[INFO] [stderr]     15:     0x560b342ab223 - build_script_build::get_version_from_erl::hbcc4c7a45697cde8
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustler-0.21.1/build.rs:28
[INFO] [stderr]     16:     0x560b342ab0a4 - build_script_build::main::h3494f3a40e91eae7
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustler-0.21.1/build.rs:21
[INFO] [stderr]     17:     0x560b342a979b - std::rt::lang_start::{{closure}}::h79e380a5358ad4bf
[INFO] [stderr]                                  at /rustc/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/src/libstd/rt.rs:67
[INFO] [stderr]     18:     0x560b343839a3 - std::rt::lang_start_internal::{{closure}}::h155f3093add35bce
[INFO] [stderr]                                  at src/libstd/rt.rs:52
[INFO] [stderr]     19:     0x560b343839a3 - std::panicking::try::do_call::h45f1f66ee6b987d6
[INFO] [stderr]                                  at src/libstd/panicking.rs:348
[INFO] [stderr]     20:     0x560b343839a3 - std::panicking::try::h0924dfb942cef7e3
[INFO] [stderr]                                  at src/libstd/panicking.rs:325
[INFO] [stderr]     21:     0x560b343839a3 - std::panic::catch_unwind::h883180846c5b53fa
[INFO] [stderr]                                  at src/libstd/panic.rs:394
[INFO] [stderr]     22:     0x560b343839a3 - std::rt::lang_start_internal::he9284d43a52786c5
[INFO] [stderr]                                  at src/libstd/rt.rs:51
[INFO] [stderr]     23:     0x560b342a9777 - std::rt::lang_start::h94676ad86d90f3f2
[INFO] [stderr]                                  at /rustc/8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e/src/libstd/rt.rs:67
[INFO] [stderr]     24:     0x560b342ababa - main
[INFO] [stderr]     25:     0x7fbacf3f00b3 - __libc_start_main
[INFO] [stderr]     26:     0x560b3429c18e - _start
[INFO] [stderr]     27:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ca467f4bdfa752c7ccb9d08e4a1d93fb52cbefb141e8c7999f72c69efc46cc2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca467f4bdfa752c7ccb9d08e4a1d93fb52cbefb141e8c7999f72c69efc46cc2f", kill_on_drop: false }`
[INFO] [stdout] ca467f4bdfa752c7ccb9d08e4a1d93fb52cbefb141e8c7999f72c69efc46cc2f