[INFO] cloning repository https://github.com/andreisilviudragnea/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andreisilviudragnea/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandreisilviudragnea%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandreisilviudragnea%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e4b634c307ff124b6ea8b5eadc5e78905741a22e
[INFO] documenting andreisilviudragnea/learning-rust against try#6ee483316d2e4581572121d60a955affb2032eb3+cargoflags=-Zrustdoc-scrape-examples for scrape-examples
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandreisilviudragnea%2Flearning-rust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/andreisilviudragnea/learning-rust on toolchain 6ee483316d2e4581572121d60a955affb2032eb3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/andreisilviudragnea/learning-rust
[INFO] finished tweaking git repo https://github.com/andreisilviudragnea/learning-rust
[INFO] tweaked toml for git repo https://github.com/andreisilviudragnea/learning-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/andreisilviudragnea/learning-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6d23fd4ee7b2185cf0843bdcdcee2537d24b022d8186818b2f5d1d9640b0c83
[INFO] running `Command { std: "docker" "start" "-a" "a6d23fd4ee7b2185cf0843bdcdcee2537d24b022d8186818b2f5d1d9640b0c83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6d23fd4ee7b2185cf0843bdcdcee2537d24b022d8186818b2f5d1d9640b0c83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6d23fd4ee7b2185cf0843bdcdcee2537d24b022d8186818b2f5d1d9640b0c83", kill_on_drop: false }`
[INFO] [stdout] a6d23fd4ee7b2185cf0843bdcdcee2537d24b022d8186818b2f5d1d9640b0c83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json" "-Zrustdoc-scrape-examples", kill_on_drop: false }`
[INFO] [stdout] 3bbdd83b1932b05a316bdbce58e7bdfb6a8bb8b8e0a9b4e1dfe2cf01c844fef2
[INFO] running `Command { std: "docker" "start" "-a" "3bbdd83b1932b05a316bdbce58e7bdfb6a8bb8b8e0a9b4e1dfe2cf01c844fef2", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking futures-sink v0.3.25
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]     Checking futures-io v0.3.25
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling tokio v1.23.0
[INFO] [stderr] error: failed to run custom build command for `libc v0.2.132`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libc-02d4e594eff5723f/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-0.2.132/build.rs:9:63
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55e276c7eeda - std::backtrace_rs::backtrace::libunwind::trace::hbb02440b40bb9669
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stderr]      1:     0x55e276c7eeda - std::backtrace_rs::backtrace::trace_unsynchronized::hd2467d754e36e43b
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55e276c7eeda - std::sys_common::backtrace::_print_fmt::h4cf36b1b450e0987
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stderr]      3:     0x55e276c7eeda - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h95ee7f4f8f4ef0e1
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x55e276c9c36e - core::fmt::write::hd95edd65674f3a7f
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/fmt/mod.rs:1208:17
[INFO] [stderr]      5:     0x55e276c7c545 - std::io::Write::write_fmt::h9b03a017f326c606
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/io/mod.rs:1682:15
[INFO] [stderr]      6:     0x55e276c7eca5 - std::sys_common::backtrace::_print::h8405574d8c3d7a77
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      7:     0x55e276c7eca5 - std::sys_common::backtrace::print::h4e89d3c49e23cb5d
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      8:     0x55e276c8032f - std::panicking::default_hook::{{closure}}::he360656a5892d484
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:267:22
[INFO] [stderr]      9:     0x55e276c8006b - std::panicking::default_hook::h96be6d1ab50c8b7a
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:286:9
[INFO] [stderr]     10:     0x55e276c80a3c - std::panicking::rust_panic_with_hook::hc047a736e498ca95
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:688:13
[INFO] [stderr]     11:     0x55e276c807d9 - std::panicking::begin_panic_handler::{{closure}}::hebe6e2aee7acb8d5
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:579:13
[INFO] [stderr]     12:     0x55e276c7f38c - std::sys_common::backtrace::__rust_end_short_backtrace::h011959547c4fdea4
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:137:18
[INFO] [stderr]     13:     0x55e276c804e2 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:575:5
[INFO] [stderr]     14:     0x55e276c581f3 - core::panicking::panic_fmt::h7da7ec46e55b48ce
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/panicking.rs:64:14
[INFO] [stderr]     15:     0x55e276c9b811 - core::panicking::panic_display::h91cc0288b9e7d27c
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/panicking.rs:135:5
[INFO] [stderr]     16:     0x55e276c9b7bb - core::panicking::panic_str::h780174483e356c64
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/panicking.rs:119:5
[INFO] [stderr]     17:     0x55e276c581b6 - core::option::expect_failed::h7c3fc4996d52b31a
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/option.rs:1879:5
[INFO] [stderr]     18:     0x55e276c5a0d4 - core::option::Option<T>::expect::hc0e996d2b67daca2
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/option.rs:741:21
[INFO] [stderr]     19:     0x55e276c5d3fe - build_script_build::main::he8fd32056be12820
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.132/build.rs:9:41
[INFO] [stderr]     20:     0x55e276c602fb - core::ops::function::FnOnce::call_once::h0d19c495eded1697
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/ops/function.rs:507:5
[INFO] [stderr]     21:     0x55e276c61e8e - std::sys_common::backtrace::__rust_begin_short_backtrace::h6e458074af2272f2
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/sys_common/backtrace.rs:121:18
[INFO] [stderr]     22:     0x55e276c5b031 - std::rt::lang_start::{{closure}}::hb8c8633aeb97b6ff
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/rt.rs:166:18
[INFO] [stderr]     23:     0x55e276c797dc - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h72a911602f0b4282
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/core/src/ops/function.rs:606:13
[INFO] [stderr]     24:     0x55e276c797dc - std::panicking::try::do_call::h94f7610073120088
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:483:40
[INFO] [stderr]     25:     0x55e276c797dc - std::panicking::try::h3a6d86000bb39b69
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:447:19
[INFO] [stderr]     26:     0x55e276c797dc - std::panic::catch_unwind::h86ac58be7aba884e
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panic.rs:137:14
[INFO] [stderr]     27:     0x55e276c797dc - std::rt::lang_start_internal::{{closure}}::h7e8903c189fcda06
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x55e276c797dc - std::panicking::try::do_call::h4d118faeab12ab4d
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:483:40
[INFO] [stderr]     29:     0x55e276c797dc - std::panicking::try::hdee2821daeeb23d9
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panicking.rs:447:19
[INFO] [stderr]     30:     0x55e276c797dc - std::panic::catch_unwind::hac7e3e2abd8ec1c5
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/panic.rs:137:14
[INFO] [stderr]     31:     0x55e276c797dc - std::rt::lang_start_internal::h1cd40ebdb8a3e2a9
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x55e276c5b00a - std::rt::lang_start::hcc04273b602dc00f
[INFO] [stderr]                                  at /rustc/6ee483316d2e4581572121d60a955affb2032eb3/library/std/src/rt.rs:165:17
[INFO] [stderr]     33:     0x55e276c5ebfe - main
[INFO] [stderr]     34:     0x7effcf6d0083 - __libc_start_main
[INFO] [stderr]     35:     0x55e276c5870e - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3bbdd83b1932b05a316bdbce58e7bdfb6a8bb8b8e0a9b4e1dfe2cf01c844fef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bbdd83b1932b05a316bdbce58e7bdfb6a8bb8b8e0a9b4e1dfe2cf01c844fef2", kill_on_drop: false }`
[INFO] [stdout] 3bbdd83b1932b05a316bdbce58e7bdfb6a8bb8b8e0a9b4e1dfe2cf01c844fef2