[INFO] cloning repository https://github.com/Bengreen/rusty-snakeskin
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Bengreen/rusty-snakeskin" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBengreen%2Frusty-snakeskin", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBengreen%2Frusty-snakeskin'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3ad2dde47405748a21d933284cb867bce516805f
[INFO] checking Bengreen/rusty-snakeskin against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBengreen%2Frusty-snakeskin" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Bengreen/rusty-snakeskin
[INFO] finished tweaking git repo https://github.com/Bengreen/rusty-snakeskin
[INFO] tweaked toml for git repo https://github.com/Bengreen/rusty-snakeskin written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Bengreen/rusty-snakeskin on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 87 packages to latest compatible versions
[INFO] [stderr]       Adding env_logger v0.9.3 (available: v0.11.8)
[INFO] [stderr]       Adding indoc-impl v0.3.6 (available: v0.3.7)
[INFO] [stderr]       Adding pyo3 v0.14.5 (available: v0.27.1)
[INFO] [stderr]       Adding pyo3-asyncio v0.14.1 (available: v0.20.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 76f5df547d596001edb8ae922655ec75c8955fc32d0ba77caa4a7eb88cd79ff6
[INFO] running `Command { std: "docker" "start" "-a" "76f5df547d596001edb8ae922655ec75c8955fc32d0ba77caa4a7eb88cd79ff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76f5df547d596001edb8ae922655ec75c8955fc32d0ba77caa4a7eb88cd79ff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76f5df547d596001edb8ae922655ec75c8955fc32d0ba77caa4a7eb88cd79ff6", kill_on_drop: false }`
[INFO] [stdout] 76f5df547d596001edb8ae922655ec75c8955fc32d0ba77caa4a7eb88cd79ff6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c197932211eb4aae65732792536e286ccd6efa49d8c9d0ebabc1e138c8e22a8
[INFO] running `Command { std: "docker" "start" "-a" "8c197932211eb4aae65732792536e286ccd6efa49d8c9d0ebabc1e138c8e22a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling unicode-ident v1.0.20
[INFO] [stderr]     Checking cfg-if v1.0.4
[INFO] [stderr]    Compiling pyo3-build-config v0.15.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]    Compiling pyo3-build-config v0.14.5
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling unindent v0.1.11
[INFO] [stderr]     Checking lock_api v0.4.14
[INFO] [stderr]     Checking mio v1.1.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.6
[INFO] [stderr]     Checking socket2 v0.6.1
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking regex-syntax v0.8.8
[INFO] [stderr]     Checking instant v0.1.13
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]     Checking humantime v2.3.0
[INFO] [stderr]     Checking log v0.4.28
[INFO] [stderr]    Compiling rusty-snakeskin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr] error: failed to run custom build command for `rusty-snakeskin v0.1.0 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/rusty-snakeskin-4cb75c0b21af0e87/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rustc-link-search=native=./clibrary
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (354) panicked at build.rs:13:10:
[INFO] [stderr]   failed to execute python command: Os { code: 2, kind: NotFound, message: "No such file or directory" }
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5e7e8ed4a492 - std::backtrace_rs::backtrace::libunwind::trace::h8714d94f1f2bd164
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x5e7e8ed4a492 - std::backtrace_rs::backtrace::trace_unsynchronized::hcafee44aa61e678f
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x5e7e8ed4a492 - std::sys::backtrace::_print_fmt::ha8fba58b2f66a9e9
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x5e7e8ed4a492 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h55273c109f480de8
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x5e7e8ed5941f - core::fmt::rt::Argument::fmt::hddc1032261c428fe
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/core/src/fmt/rt.rs:173:76
[INFO] [stderr]      5:     0x5e7e8ed5941f - core::fmt::write::he6bcf7c3f2c4eba5
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/core/src/fmt/mod.rs:1469:25
[INFO] [stderr]      6:     0x5e7e8ed20eb3 - std::io::default_write_fmt::hf93eabd79e5df19f
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x5e7e8ed20eb3 - std::io::Write::write_fmt::hc4c289442f488f72
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/io/mod.rs:1954:13
[INFO] [stderr]      8:     0x5e7e8ed2a2c2 - std::sys::backtrace::BacktraceLock::print::h453555a0d0bae7d2
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      9:     0x5e7e8ed2bf0c - std::panicking::default_hook::{{closure}}::h3ebcee4d4a10f231
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panicking.rs:301:27
[INFO] [stderr]     10:     0x5e7e8ed2bd66 - std::panicking::default_hook::h8d904937f0dd5b7e
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panicking.rs:328:9
[INFO] [stderr]     11:     0x5e7e8ed2c4e5 - std::panicking::panic_with_hook::hba74873bd829b497
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panicking.rs:834:13
[INFO] [stderr]     12:     0x5e7e8ed2c37a - std::panicking::panic_handler::{{closure}}::h0dde4058cec7fa08
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panicking.rs:707:13
[INFO] [stderr]     13:     0x5e7e8ed2a3f9 - std::sys::backtrace::__rust_end_short_backtrace::h9342f1937ef55218
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/sys/backtrace.rs:174:18
[INFO] [stderr]     14:     0x5e7e8ed1576d - __rustc[5a136cd62b6ae824]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panicking.rs:698:5
[INFO] [stderr]     15:     0x5e7e8ed5c8e0 - core::panicking::panic_fmt::h7e8daff19647caf5
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x5e7e8ed5c166 - core::result::unwrap_failed::ha7938522f7f7027e
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/core/src/result.rs:1862:5
[INFO] [stderr]     17:     0x5e7e8ed134e2 - core::result::Result<T,E>::expect::h946ca53ef665631c
[INFO] [stderr]     18:     0x5e7e8ed11450 - build_script_build::main::hcb8e43ade1fd6494
[INFO] [stderr]     19:     0x5e7e8ed12493 - core::ops::function::FnOnce::call_once::h088c09c4fc16cb0c
[INFO] [stderr]     20:     0x5e7e8ed121c6 - std::sys::backtrace::__rust_begin_short_backtrace::hefcf11cd506337d1
[INFO] [stderr]     21:     0x5e7e8ed120f9 - std::rt::lang_start::{{closure}}::h9b656819c2fc6aa5
[INFO] [stderr]     22:     0x5e7e8ed22510 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h7c8c93d7c0cb0422
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     23:     0x5e7e8ed22510 - std::panicking::catch_unwind::do_call::ha03d5ac0e4aa50e7
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panicking.rs:590:40
[INFO] [stderr]     24:     0x5e7e8ed22510 - std::panicking::catch_unwind::hfba45bb934fc2e1a
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panicking.rs:553:19
[INFO] [stderr]     25:     0x5e7e8ed22510 - std::panic::catch_unwind::h51a82f25faf184c3
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panic.rs:359:14
[INFO] [stderr]     26:     0x5e7e8ed22510 - std::rt::lang_start_internal::{{closure}}::h89e47390206e3c4f
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/rt.rs:175:24
[INFO] [stderr]     27:     0x5e7e8ed22510 - std::panicking::catch_unwind::do_call::h6e1e6dcf14a2eeab
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panicking.rs:590:40
[INFO] [stderr]     28:     0x5e7e8ed22510 - std::panicking::catch_unwind::h8dc206e2e3376274
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panicking.rs:553:19
[INFO] [stderr]     29:     0x5e7e8ed22510 - std::panic::catch_unwind::h0ff4af620be037da
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/panic.rs:359:14
[INFO] [stderr]     30:     0x5e7e8ed22510 - std::rt::lang_start_internal::h2f00f16ee79d72a1
[INFO] [stderr]                                  at /rustc/b4c55082edd8dec08ce8af276d7054d9c4db20c4/library/std/src/rt.rs:171:5
[INFO] [stderr]     31:     0x5e7e8ed120e1 - std::rt::lang_start::heebf3b0d932c2867
[INFO] [stderr]     32:     0x5e7e8ed15485 - main
[INFO] [stderr]     33:     0x7afe8fb751ca - <unknown>
[INFO] [stderr]     34:     0x7afe8fb7528b - __libc_start_main
[INFO] [stderr]     35:     0x5e7e8ed11225 - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "8c197932211eb4aae65732792536e286ccd6efa49d8c9d0ebabc1e138c8e22a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c197932211eb4aae65732792536e286ccd6efa49d8c9d0ebabc1e138c8e22a8", kill_on_drop: false }`
[INFO] [stdout] 8c197932211eb4aae65732792536e286ccd6efa49d8c9d0ebabc1e138c8e22a8
