[INFO] fetching crate serde_rustler 0.1.0...
[INFO] checking serde_rustler-0.1.0 against master#d902752866cbbdb331e3cf28ff6bba86ab0f6c62 for pr-77271
[INFO] extracting crate serde_rustler 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate serde_rustler 0.1.0 on toolchain d902752866cbbdb331e3cf28ff6bba86ab0f6c62
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "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-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee5f902a050236c3739b65c563fb3b60df34988ae640acac77e917d318adce5e
[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" "ee5f902a050236c3739b65c563fb3b60df34988ae640acac77e917d318adce5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee5f902a050236c3739b65c563fb3b60df34988ae640acac77e917d318adce5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee5f902a050236c3739b65c563fb3b60df34988ae640acac77e917d318adce5e", kill_on_drop: false }`
[INFO] [stdout] ee5f902a050236c3739b65c563fb3b60df34988ae640acac77e917d318adce5e
[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" "+d902752866cbbdb331e3cf28ff6bba86ab0f6c62" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39ae71051ddfe431363f088c2330650db6514857703c20ce1f550128416c67a6
[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" "39ae71051ddfe431363f088c2330650db6514857703c20ce1f550128416c67a6", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling adler v0.2.3
[INFO] [stderr]    Compiling gimli v0.22.0
[INFO] [stderr]    Compiling object v0.20.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling rustler_sys v2.1.0
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.2
[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 v0.3.51
[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-21f2e8908cd2a3cc/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:46:44
[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:121:35
[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:84:40
[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:59:20
[INFO] [stderr]      4: <T as core::convert::Into<U>>::into
[INFO] [stderr]                at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/core/src/convert/mod.rs:545:9
[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:85:20
[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:83:5
[INFO] [stderr]      7: which::which
[INFO] [stderr]                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/which-2.0.1/src/lib.rs:67:5
[INFO] [stderr]      8: build_script_build::get_version_from_erl
[INFO] [stderr]                at build.rs:28:15
[INFO] [stderr]      9: build_script_build::main
[INFO] [stderr]                at build.rs:21:19
[INFO] [stderr]     10: core::ops::function::FnOnce::call_once
[INFO] [stderr]                at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     11: std::sys_common::backtrace::__rust_begin_short_backtrace
[INFO] [stderr]                at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/sys_common/backtrace.rs:137:18
[INFO] [stderr]     12: std::rt::lang_start::{{closure}}
[INFO] [stderr]                at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/rt.rs:66:18
[INFO] [stderr]     13: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stderr]                at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/core/src/ops/function.rs:259:13
[INFO] [stderr]         std::panicking::try::do_call
[INFO] [stderr]                at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panicking.rs:381:40
[INFO] [stderr]         std::panicking::try
[INFO] [stderr]                at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panicking.rs:345:19
[INFO] [stderr]         std::panic::catch_unwind
[INFO] [stderr]                at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panic.rs:382:14
[INFO] [stderr]         std::rt::lang_start_internal
[INFO] [stderr]                at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/rt.rs:51:25
[INFO] [stderr]     14: std::rt::lang_start
[INFO] [stderr]                at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/rt.rs:65:5
[INFO] [stderr]     15: main
[INFO] [stderr]     16: __libc_start_main
[INFO] [stderr]     17: _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:     0x5559abe77f80 - std::backtrace_rs::backtrace::libunwind::trace::he85dfb3ae4206056
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x5559abe77f80 - std::backtrace_rs::backtrace::trace_unsynchronized::h1ad28094d7b00c21
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x5559abe77f80 - std::sys_common::backtrace::_print_fmt::h901b54610713cd21
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x5559abe77f80 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb0ad78ee1571f7e0
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x5559abe950ec - core::fmt::write::h1857a60b204f1b6a
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/core/src/fmt/mod.rs:1080
[INFO] [stderr]      5:     0x5559abe755d2 - std::io::Write::write_fmt::hf7b7d7b243f84a36
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/io/mod.rs:1516
[INFO] [stderr]      6:     0x5559abe7a11d - std::sys_common::backtrace::_print::hd093978a5287b8ff
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x5559abe7a11d - std::sys_common::backtrace::print::h20f46787581d56d7
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x5559abe7a11d - std::panicking::default_hook::{{closure}}::h486cbb4b82ffc357
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panicking.rs:208
[INFO] [stderr]      9:     0x5559abe79dc8 - std::panicking::default_hook::h4190c9e3edd4d591
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panicking.rs:227
[INFO] [stderr]     10:     0x5559abe7a801 - std::panicking::rust_panic_with_hook::h72e78719cdda225c
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panicking.rs:577
[INFO] [stderr]     11:     0x5559abe7a3a9 - std::panicking::begin_panic_handler::{{closure}}::h8bd07dbd34150a96
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panicking.rs:484
[INFO] [stderr]     12:     0x5559abe7840c - std::sys_common::backtrace::__rust_end_short_backtrace::hdb6b3066ad29028a
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x5559abe7a369 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panicking.rs:483
[INFO] [stderr]     14:     0x5559abe94411 - core::panicking::panic_fmt::hb15d6f55e8472f62
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/core/src/panicking.rs:85
[INFO] [stderr]     15:     0x5559abe94233 - core::option::expect_none_failed::he492a18657d97593
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/core/src/option.rs:1234
[INFO] [stderr]     16:     0x5559abd91428 - core::result::Result<T,E>::expect::hc45d192fb370b708
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/core/src/result.rs:933
[INFO] [stderr]     17:     0x5559abd86a63 - build_script_build::get_version_from_erl::h2606507f8498b52b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustler-0.21.1/build.rs:28
[INFO] [stderr]     18:     0x5559abd868e4 - build_script_build::main::h64b22f0d8dfd768f
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustler-0.21.1/build.rs:21
[INFO] [stderr]     19:     0x5559abd91c8b - core::ops::function::FnOnce::call_once::hf8480403dc57ba18
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/core/src/ops/function.rs:227
[INFO] [stderr]     20:     0x5559abd873be - std::sys_common::backtrace::__rust_begin_short_backtrace::hdbddb6934c533542
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     21:     0x5559abd90ad1 - std::rt::lang_start::{{closure}}::h3788298b4bb031fb
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/rt.rs:66
[INFO] [stderr]     22:     0x5559abe7abc0 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h5e15f43ce28787f7
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/core/src/ops/function.rs:259
[INFO] [stderr]     23:     0x5559abe7abc0 - std::panicking::try::do_call::h764f1891769113e9
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panicking.rs:381
[INFO] [stderr]     24:     0x5559abe7abc0 - std::panicking::try::h0f2fe4fdd5e0ad19
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panicking.rs:345
[INFO] [stderr]     25:     0x5559abe7abc0 - std::panic::catch_unwind::h1634e40dd3a19f80
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/panic.rs:382
[INFO] [stderr]     26:     0x5559abe7abc0 - std::rt::lang_start_internal::h8d4bc7b854bbd5fe
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/rt.rs:51
[INFO] [stderr]     27:     0x5559abd90aa7 - std::rt::lang_start::h3844ecf3301ac9bf
[INFO] [stderr]                                  at /rustc/d902752866cbbdb331e3cf28ff6bba86ab0f6c62/library/std/src/rt.rs:65
[INFO] [stderr]     28:     0x5559abd872da - main
[INFO] [stderr]     29:     0x7fcc10ae30b3 - __libc_start_main
[INFO] [stderr]     30:     0x5559abd840be - _start
[INFO] [stderr]     31:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "39ae71051ddfe431363f088c2330650db6514857703c20ce1f550128416c67a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39ae71051ddfe431363f088c2330650db6514857703c20ce1f550128416c67a6", kill_on_drop: false }`
[INFO] [stdout] 39ae71051ddfe431363f088c2330650db6514857703c20ce1f550128416c67a6