[INFO] fetching crate serde_python 0.1.1...
[INFO] checking serde_python-0.1.1 against try#df0acfe6d8f079d1fdd8e6b7447569d81b00f126 for pr-100555
[INFO] extracting crate serde_python 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate serde_python 0.1.1 on toolchain df0acfe6d8f079d1fdd8e6b7447569d81b00f126
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+df0acfe6d8f079d1fdd8e6b7447569d81b00f126" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_python 0.1.1
[INFO] finished tweaking crates.io crate serde_python 0.1.1
[INFO] tweaked toml for crates.io crate serde_python 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+df0acfe6d8f079d1fdd8e6b7447569d81b00f126" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+df0acfe6d8f079d1fdd8e6b7447569d81b00f126" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+df0acfe6d8f079d1fdd8e6b7447569d81b00f126" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6490e45bcf1f1f68ebd7943b362192732d00fa1d377d2cbee043962b77691478
[INFO] running `Command { std: "docker" "start" "-a" "6490e45bcf1f1f68ebd7943b362192732d00fa1d377d2cbee043962b77691478", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6490e45bcf1f1f68ebd7943b362192732d00fa1d377d2cbee043962b77691478", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6490e45bcf1f1f68ebd7943b362192732d00fa1d377d2cbee043962b77691478", kill_on_drop: false }`
[INFO] [stdout] 6490e45bcf1f1f68ebd7943b362192732d00fa1d377d2cbee043962b77691478
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+df0acfe6d8f079d1fdd8e6b7447569d81b00f126" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec18a57d19c6fcaa55ec643550d63b3bcfd8dcd75e06ce84ce40a7dc4ffe8a6f
[INFO] running `Command { std: "docker" "start" "-a" "ec18a57d19c6fcaa55ec643550d63b3bcfd8dcd75e06ce84ce40a7dc4ffe8a6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling libc v0.2.131
[INFO] [stderr]    Compiling serde v1.0.143
[INFO] [stderr]    Compiling cpython v0.2.1
[INFO] [stderr]     Checking unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]     Checking heck v0.3.3
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr] error: failed to run custom build command for `libc v0.2.131`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libc-e7e9f3e22ce8cd4e/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-changed=build.rs
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Failed to get rustc version', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.131/build.rs:9:63
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x559f9330ae20 - std::backtrace_rs::backtrace::libunwind::trace::hbcb16d55b8506aa5
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      1:     0x559f9330ae20 - std::backtrace_rs::backtrace::trace_unsynchronized::hf7a4a940fa1f8cb8
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x559f9330ae20 - std::sys_common::backtrace::_print_fmt::h19b6bfb86a540beb
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/sys_common/backtrace.rs:66:5
[INFO] [stderr]      3:     0x559f9330ae20 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h4efbd2ca76dfe43c
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/sys_common/backtrace.rs:45:22
[INFO] [stderr]      4:     0x559f933285fe - core::fmt::write::hcf151bde7961613c
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/core/src/fmt/mod.rs:1202:17
[INFO] [stderr]      5:     0x559f933081c5 - std::io::Write::write_fmt::h2918ebef2857dcc1
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/io/mod.rs:1672:15
[INFO] [stderr]      6:     0x559f9330c583 - std::sys_common::backtrace::_print::h1c807555f929250e
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/sys_common/backtrace.rs:48:5
[INFO] [stderr]      7:     0x559f9330c583 - std::sys_common::backtrace::print::he7ea6eb92b22658d
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/sys_common/backtrace.rs:35:9
[INFO] [stderr]      8:     0x559f9330c583 - std::panicking::default_hook::{{closure}}::h8f797a1af3524f7c
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panicking.rs:295:22
[INFO] [stderr]      9:     0x559f9330c26f - std::panicking::default_hook::hbf4c39be1bbb3401
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panicking.rs:314:9
[INFO] [stderr]     10:     0x559f9330cc2a - std::panicking::rust_panic_with_hook::h4a8efaaadf0befd0
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panicking.rs:698:17
[INFO] [stderr]     11:     0x559f9330cb27 - std::panicking::begin_panic_handler::{{closure}}::h8865961652c93e34
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panicking.rs:588:13
[INFO] [stderr]     12:     0x559f9330b32c - std::sys_common::backtrace::__rust_end_short_backtrace::h7afec31e55a85950
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/sys_common/backtrace.rs:138:18
[INFO] [stderr]     13:     0x559f9330c842 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panicking.rs:584:5
[INFO] [stderr]     14:     0x559f932e59f3 - core::panicking::panic_fmt::he96037b585e1115c
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/core/src/panicking.rs:142:14
[INFO] [stderr]     15:     0x559f933277d1 - core::panicking::panic_display::h3b55b9fb77fbd928
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/core/src/panicking.rs:72:5
[INFO] [stderr]     16:     0x559f9332777b - core::panicking::panic_str::h25e89ae3556f8500
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/core/src/panicking.rs:56:5
[INFO] [stderr]     17:     0x559f932e5866 - core::option::expect_failed::hbc9c38ca36bc796f
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/core/src/option.rs:1874:5
[INFO] [stderr]     18:     0x559f932e80d2 - core::option::Option<T>::expect::h04528191dd17fcdb
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/core/src/option.rs:738:21
[INFO] [stderr]     19:     0x559f932eb604 - build_script_build::main::hbd5d2714448a5897
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.131/build.rs:9:41
[INFO] [stderr]     20:     0x559f932efa5b - core::ops::function::FnOnce::call_once::hd5f78343e805c271
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/core/src/ops/function.rs:248:5
[INFO] [stderr]     21:     0x559f932ef7de - std::sys_common::backtrace::__rust_begin_short_backtrace::ha4870dcd25a9b8ec
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/sys_common/backtrace.rs:122:18
[INFO] [stderr]     22:     0x559f932ece41 - std::rt::lang_start::{{closure}}::hfe76644dc45e0a6c
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/rt.rs:145:18
[INFO] [stderr]     23:     0x559f9330576f - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h987fd3f116a43cca
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/core/src/ops/function.rs:280:13
[INFO] [stderr]     24:     0x559f9330576f - std::panicking::try::do_call::he85eb085216da788
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panicking.rs:492:40
[INFO] [stderr]     25:     0x559f9330576f - std::panicking::try::h25079d941d646086
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panicking.rs:456:19
[INFO] [stderr]     26:     0x559f9330576f - std::panic::catch_unwind::h9c086a3ee7527dfa
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panic.rs:137:14
[INFO] [stderr]     27:     0x559f9330576f - std::rt::lang_start_internal::{{closure}}::haefcd4fd2d1db261
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/rt.rs:128:48
[INFO] [stderr]     28:     0x559f9330576f - std::panicking::try::do_call::hd76eb7e433e75818
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panicking.rs:492:40
[INFO] [stderr]     29:     0x559f9330576f - std::panicking::try::h961618ebe7254241
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panicking.rs:456:19
[INFO] [stderr]     30:     0x559f9330576f - std::panic::catch_unwind::h6bd0ce65cff8f49a
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/panic.rs:137:14
[INFO] [stderr]     31:     0x559f9330576f - std::rt::lang_start_internal::hc47d5c9a63edda98
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/rt.rs:128:20
[INFO] [stderr]     32:     0x559f932ece10 - std::rt::lang_start::hcf7a3f4eb22ea4bd
[INFO] [stderr]                                  at /rustc/df0acfe6d8f079d1fdd8e6b7447569d81b00f126/library/std/src/rt.rs:144:17
[INFO] [stderr]     33:     0x559f932ecddc - main
[INFO] [stderr]     34:     0x7fb6fa37b083 - __libc_start_main
[INFO] [stderr]     35:     0x559f932e5bee - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ec18a57d19c6fcaa55ec643550d63b3bcfd8dcd75e06ce84ce40a7dc4ffe8a6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec18a57d19c6fcaa55ec643550d63b3bcfd8dcd75e06ce84ce40a7dc4ffe8a6f", kill_on_drop: false }`
[INFO] [stdout] ec18a57d19c6fcaa55ec643550d63b3bcfd8dcd75e06ce84ce40a7dc4ffe8a6f