[INFO] fetching crate py-pkstl 0.1.0...
[INFO] checking py-pkstl-0.1.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate py-pkstl 0.1.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate py-pkstl 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate py-pkstl 0.1.0
[INFO] finished tweaking crates.io crate py-pkstl 0.1.0
[INFO] tweaked toml for crates.io crate py-pkstl 0.1.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded chacha20-poly1305-aead v0.1.2
[INFO] [stderr]   Downloaded pkstl v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f7a0256ac72d172c7b9456b4345bb2936f1a4d597bf260f58b3144582f9d2c56
[INFO] running `Command { std: "docker" "start" "-a" "f7a0256ac72d172c7b9456b4345bb2936f1a4d597bf260f58b3144582f9d2c56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7a0256ac72d172c7b9456b4345bb2936f1a4d597bf260f58b3144582f9d2c56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7a0256ac72d172c7b9456b4345bb2936f1a4d597bf260f58b3144582f9d2c56", kill_on_drop: false }`
[INFO] [stdout] f7a0256ac72d172c7b9456b4345bb2936f1a4d597bf260f58b3144582f9d2c56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 811dedadb2d5223a7df6633bdb809a8d31fedfb8144a258dc6ec8bfedf480dbf
[INFO] running `Command { std: "docker" "start" "-a" "811dedadb2d5223a7df6633bdb809a8d31fedfb8144a258dc6ec8bfedf480dbf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]    Compiling unindent v0.1.7
[INFO] [stderr]    Compiling inventory v0.1.10
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling clear_on_drop v0.2.4
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking object v0.26.2
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling inventory-impl v0.1.10
[INFO] [stderr]    Compiling ctor v0.1.21
[INFO] [stderr]    Compiling pyo3-derive-backend v0.8.5
[INFO] [stderr]    Compiling ghost v0.1.2
[INFO] [stderr]     Checking miniz_oxide v0.4.4
[INFO] [stderr]     Checking ring v0.16.20
[INFO] [stderr]     Checking chacha20-poly1305-aead v0.1.2
[INFO] [stderr]    Compiling indoc-impl v0.3.6
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]    Compiling pyo3cls v0.8.5
[INFO] [stderr]     Checking indoc v0.3.6
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking pkstl v0.1.0
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]    Compiling pyo3 v0.8.5
[INFO] [stderr] error: failed to run custom build command for `pyo3 v0.8.5`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/pyo3-d03d9baaa2402dc1/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Error: pyo3 requires a nightly or dev version of Rust.', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pyo3-0.8.5/build.rs:542:9
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x561a8067a6a0 - std::backtrace_rs::backtrace::libunwind::trace::ha0ad43e8a952bfe7
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x561a8067a6a0 - std::backtrace_rs::backtrace::trace_unsynchronized::h6830419c0c4130dc
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x561a8067a6a0 - std::sys_common::backtrace::_print_fmt::h8f3516631ffa1ef5
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x561a8067a6a0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he1640d5f0d93f618
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x561a8069c3dc - core::fmt::write::h88012e1f01caeebf
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/core/src/fmt/mod.rs:1115:17
[INFO] [stderr]      5:     0x561a80678245 - std::io::Write::write_fmt::h360fa85b30182555
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/io/mod.rs:1665:15
[INFO] [stderr]      6:     0x561a8067c5fb - std::sys_common::backtrace::_print::ha1f00492f406a015
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x561a8067c5fb - std::sys_common::backtrace::print::hd54561b13feb6af3
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x561a8067c5fb - std::panicking::default_hook::{{closure}}::h84fe124cd0864662
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x561a8067c0d1 - std::panicking::default_hook::h5a8e74a76ce290a7
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x561a8067ccc4 - std::panicking::rust_panic_with_hook::h67c812a4fe9d4c91
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panicking.rs:622:17
[INFO] [stderr]     11:     0x561a8061a1d3 - std::panicking::begin_panic::{{closure}}::ha4fa890cb7b8ef5c
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panicking.rs:542:9
[INFO] [stderr]     12:     0x561a80601a39 - std::sys_common::backtrace::__rust_end_short_backtrace::hf1c0d54ddf2f1065
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x561a8061a109 - std::panicking::begin_panic::hf964e9b0c75f6fbd
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panicking.rs:541:12
[INFO] [stderr]     14:     0x561a804747cd - build_script_build::check_rustc_version::h86917d9127051cc8
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pyo3-0.8.5/build.rs:542:9
[INFO] [stderr]     15:     0x561a80474ab4 - build_script_build::main::h29b3bb41f96afc67
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pyo3-0.8.5/build.rs:563:5
[INFO] [stderr]     16:     0x561a8047a1a2 - core::ops::function::FnOnce::call_once::hfb43771555f72e9d
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     17:     0x561a8047d6ca - std::sys_common::backtrace::__rust_begin_short_backtrace::he957ffda81bf1d05
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     18:     0x561a80479ea6 - std::rt::lang_start::{{closure}}::h7e781f3ac771611f
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/rt.rs:63:18
[INFO] [stderr]     19:     0x561a8067d1ca - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::ha9408abe89f69dc4
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     20:     0x561a8067d1ca - std::panicking::try::do_call::h5b0cc9e9102acb65
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panicking.rs:401:40
[INFO] [stderr]     21:     0x561a8067d1ca - std::panicking::try::hddc7f8229138b3ba
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panicking.rs:365:19
[INFO] [stderr]     22:     0x561a8067d1ca - std::panic::catch_unwind::hfa401ff8bab2986e
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panic.rs:434:14
[INFO] [stderr]     23:     0x561a8067d1ca - std::rt::lang_start_internal::{{closure}}::h8163422320d11405
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/rt.rs:45:48
[INFO] [stderr]     24:     0x561a8067d1ca - std::panicking::try::do_call::hc742cc7bb4f0fb20
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panicking.rs:401:40
[INFO] [stderr]     25:     0x561a8067d1ca - std::panicking::try::ha37d8d2dd1acf7d3
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panicking.rs:365:19
[INFO] [stderr]     26:     0x561a8067d1ca - std::panic::catch_unwind::h8a5381d5ecf437bc
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/panic.rs:434:14
[INFO] [stderr]     27:     0x561a8067d1ca - std::rt::lang_start_internal::h7e2cee8c90d4a4d3
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/rt.rs:45:20
[INFO] [stderr]     28:     0x561a80479e70 - std::rt::lang_start::h30431cb2685bd919
[INFO] [stderr]                                  at /rustc/c8dfcfe046a7680554bf4eb612bad840e7631c4b/library/std/src/rt.rs:62:5
[INFO] [stderr]     29:     0x561a80479dfc - main
[INFO] [stderr]     30:     0x7fcee8c870b3 - __libc_start_main
[INFO] [stderr]     31:     0x561a80465f5e - _start
[INFO] [stderr]     32:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "811dedadb2d5223a7df6633bdb809a8d31fedfb8144a258dc6ec8bfedf480dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "811dedadb2d5223a7df6633bdb809a8d31fedfb8144a258dc6ec8bfedf480dbf", kill_on_drop: false }`
[INFO] [stdout] 811dedadb2d5223a7df6633bdb809a8d31fedfb8144a258dc6ec8bfedf480dbf
