[INFO] fetching crate rcrawl 1.2.1...
[INFO] checking rcrawl-1.2.1 against try#692571811df96d28cfa90e2b8cdf3be7e99c44e1 for pr-104148
[INFO] extracting crate rcrawl 1.2.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate rcrawl 1.2.1 on toolchain 692571811df96d28cfa90e2b8cdf3be7e99c44e1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+692571811df96d28cfa90e2b8cdf3be7e99c44e1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rcrawl 1.2.1
[INFO] finished tweaking crates.io crate rcrawl 1.2.1
[INFO] tweaked toml for crates.io crate rcrawl 1.2.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate rcrawl 1.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+692571811df96d28cfa90e2b8cdf3be7e99c44e1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+692571811df96d28cfa90e2b8cdf3be7e99c44e1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2281d1328a7d05c0dfae718d2e1851c66937e2a8e99ed0cea66426b36a158c1
[INFO] running `Command { std: "docker" "start" "-a" "a2281d1328a7d05c0dfae718d2e1851c66937e2a8e99ed0cea66426b36a158c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2281d1328a7d05c0dfae718d2e1851c66937e2a8e99ed0cea66426b36a158c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2281d1328a7d05c0dfae718d2e1851c66937e2a8e99ed0cea66426b36a158c1", kill_on_drop: false }`
[INFO] [stdout] a2281d1328a7d05c0dfae718d2e1851c66937e2a8e99ed0cea66426b36a158c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+692571811df96d28cfa90e2b8cdf3be7e99c44e1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 595ffda3bfcd7116996f196274ffc9b788d05320a385295fce7979f44d37f09a
[INFO] running `Command { std: "docker" "start" "-a" "595ffda3bfcd7116996f196274ffc9b788d05320a385295fce7979f44d37f09a", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr] error: failed to run custom build command for `libc v0.2.71`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libc-bc6c69f8bde71f2b/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Failed to get rustc version', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.71/build.rs:7:31
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x564979a5c860 - std::backtrace_rs::backtrace::libunwind::trace::heb804f3b5c5f064a
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stderr]      1:     0x564979a5c860 - std::backtrace_rs::backtrace::trace_unsynchronized::hbf73e6ae2e004e68
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x564979a5c860 - std::sys_common::backtrace::_print_fmt::h9844e696c89caf28
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stderr]      3:     0x564979a5c860 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h909b866105b9cb21
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x564979a7995e - core::fmt::write::h85707003ec908cdc
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/core/src/fmt/mod.rs:1209:17
[INFO] [stderr]      5:     0x564979a59f15 - std::io::Write::write_fmt::h989c6a58e21613ab
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/io/mod.rs:1682:15
[INFO] [stderr]      6:     0x564979a5c625 - std::sys_common::backtrace::_print::h7946565b0266f9d5
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      7:     0x564979a5c625 - std::sys_common::backtrace::print::h892d1023f8000c77
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      8:     0x564979a5dd0f - std::panicking::default_hook::{{closure}}::hdb0e0ee03c8b95cd
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panicking.rs:267:22
[INFO] [stderr]      9:     0x564979a5da4a - std::panicking::default_hook::h08a75b028e35e634
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panicking.rs:286:9
[INFO] [stderr]     10:     0x564979a5e40c - std::panicking::rust_panic_with_hook::h7509a6f5a9caf0dc
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panicking.rs:688:13
[INFO] [stderr]     11:     0x564979a5e1a7 - std::panicking::begin_panic_handler::{{closure}}::h1886f13d1427500d
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panicking.rs:579:13
[INFO] [stderr]     12:     0x564979a5cd0c - std::sys_common::backtrace::__rust_end_short_backtrace::h25b65445434ce10c
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/sys_common/backtrace.rs:137:18
[INFO] [stderr]     13:     0x564979a5dec2 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panicking.rs:575:5
[INFO] [stderr]     14:     0x564979a36083 - core::panicking::panic_fmt::h55545ef44697c555
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/core/src/panicking.rs:65:14
[INFO] [stderr]     15:     0x564979a78c01 - core::panicking::panic_display::h0764f0c93a7775e4
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/core/src/panicking.rs:139:5
[INFO] [stderr]     16:     0x564979a78bab - core::panicking::panic_str::h9b755134c53434bf
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/core/src/panicking.rs:123:5
[INFO] [stderr]     17:     0x564979a36046 - core::option::expect_failed::he8b260af56609f6a
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/core/src/option.rs:1879:5
[INFO] [stderr]     18:     0x564979a3fdd9 - core::option::Option<T>::expect::h598faab2a19f6608
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/core/src/option.rs:741:21
[INFO] [stderr]     19:     0x564979a3c947 - build_script_build::main::h0886dfe3f2cf99c6
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.71/build.rs:7:9
[INFO] [stderr]     20:     0x564979a3e90b - core::ops::function::FnOnce::call_once::h722ef33e5e969ca6
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/core/src/ops/function.rs:510:5
[INFO] [stderr]     21:     0x564979a3f69e - std::sys_common::backtrace::__rust_begin_short_backtrace::h85fc2505a3aff24b
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/sys_common/backtrace.rs:121:18
[INFO] [stderr]     22:     0x564979a386d1 - std::rt::lang_start::{{closure}}::hb2f5e85787522a7c
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/rt.rs:166:18
[INFO] [stderr]     23:     0x564979a5726b - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::he16e93650c3ebbf6
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/core/src/ops/function.rs:609:13
[INFO] [stderr]     24:     0x564979a5726b - std::panicking::try::do_call::h9b25452f653ea35a
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panicking.rs:483:40
[INFO] [stderr]     25:     0x564979a5726b - std::panicking::try::h9892b434325b461e
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panicking.rs:447:19
[INFO] [stderr]     26:     0x564979a5726b - std::panic::catch_unwind::h27a9f0a40aa798bd
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panic.rs:137:14
[INFO] [stderr]     27:     0x564979a5726b - std::rt::lang_start_internal::{{closure}}::h85b6026c8ff1890b
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x564979a5726b - std::panicking::try::do_call::h0eef23e00edb0f60
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panicking.rs:483:40
[INFO] [stderr]     29:     0x564979a5726b - std::panicking::try::hb2a4084d1ceb02ec
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panicking.rs:447:19
[INFO] [stderr]     30:     0x564979a5726b - std::panic::catch_unwind::hb52e7ae52c72a21f
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/panic.rs:137:14
[INFO] [stderr]     31:     0x564979a5726b - std::rt::lang_start_internal::h653b9fe2586a513d
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x564979a386aa - std::rt::lang_start::hd1a1bf6f70cda8a9
[INFO] [stderr]                                  at /rustc/692571811df96d28cfa90e2b8cdf3be7e99c44e1/library/std/src/rt.rs:165:17
[INFO] [stderr]     33:     0x564979a3ddde - main
[INFO] [stderr]     34:     0x7f5af984a083 - __libc_start_main
[INFO] [stderr]     35:     0x564979a363ce - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "595ffda3bfcd7116996f196274ffc9b788d05320a385295fce7979f44d37f09a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "595ffda3bfcd7116996f196274ffc9b788d05320a385295fce7979f44d37f09a", kill_on_drop: false }`
[INFO] [stdout] 595ffda3bfcd7116996f196274ffc9b788d05320a385295fce7979f44d37f09a