[INFO] fetching crate nanny 0.0.9...
[INFO] checking nanny-0.0.9 against try#bb9dbf1d07454a99066eabaabd5819851281494b for pr-80920
[INFO] extracting crate nanny 0.0.9 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate nanny 0.0.9 on toolchain bb9dbf1d07454a99066eabaabd5819851281494b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nanny 0.0.9
[INFO] removed path dependency nanny-sys from crates.io crate nanny 0.0.9
[INFO] finished tweaking crates.io crate nanny 0.0.9
[INFO] tweaked toml for crates.io crate nanny 0.0.9 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nanny-sys v0.0.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c349ed3561a461241141f3ba85c910d49d3a12c41f37b74b4e53391550275f8f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c349ed3561a461241141f3ba85c910d49d3a12c41f37b74b4e53391550275f8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c349ed3561a461241141f3ba85c910d49d3a12c41f37b74b4e53391550275f8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c349ed3561a461241141f3ba85c910d49d3a12c41f37b74b4e53391550275f8f", kill_on_drop: false }`
[INFO] [stdout] c349ed3561a461241141f3ba85c910d49d3a12c41f37b74b4e53391550275f8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43ed640ffeff648763fd3f1283276790675cad93f496969e165db6dbd8c6f1e0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "43ed640ffeff648763fd3f1283276790675cad93f496969e165db6dbd8c6f1e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling nanny-sys v0.0.6
[INFO] [stderr] error: failed to run custom build command for `nanny-sys v0.0.6`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/nanny-sys-bd412bae5ea5fbb1/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nanny-sys-0.0.6/build.rs:23:54
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x560ec4be77a7 - std::backtrace_rs::backtrace::libunwind::trace::h8bc78f7bc1f75bdb
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x560ec4be77a7 - std::backtrace_rs::backtrace::trace_unsynchronized::ha4c961c9576f95ba
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x560ec4be77a7 - std::sys_common::backtrace::_print_fmt::hc20cfdc233d6eb02
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x560ec4be77a7 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h04bea14549780a0f
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x560ec4c041fc - core::fmt::write::h3868db8542c90941
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/core/src/fmt/mod.rs:1078:17
[INFO] [stderr]      5:     0x560ec4be3532 - std::io::Write::write_fmt::h55dd75636eef6a5c
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/io/mod.rs:1518:15
[INFO] [stderr]      6:     0x560ec4be98b5 - std::sys_common::backtrace::_print::h6439e8525077c7da
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x560ec4be98b5 - std::sys_common::backtrace::print::h02b685f728ce3931
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x560ec4be98b5 - std::panicking::default_hook::{{closure}}::h7c29625065fafae1
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x560ec4be9413 - std::panicking::default_hook::hba441710bb71f4d5
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x560ec4bea051 - std::panicking::rust_panic_with_hook::ha936eb00e51bc4d9
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x560ec4be9b67 - std::panicking::begin_panic_handler::{{closure}}::hcd15140e0238536e
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/panicking.rs:495:13
[INFO] [stderr]     12:     0x560ec4be7c6c - std::sys_common::backtrace::__rust_end_short_backtrace::hb13a021bb64823a1
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x560ec4be9af9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x560ec4c035d1 - core::panicking::panic_fmt::h20225113c4a2f8fd
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x560ec4c0351d - core::panicking::panic::h35b77276aa4b0c12
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x560ec4b8b1f8 - core::option::Option<T>::unwrap::he2e78a9c68beb776
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/core/src/option.rs:386:21
[INFO] [stderr]     17:     0x560ec4b8b99f - build_script_build::build_object_file::h61167f73b6e76204
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nanny-sys-0.0.6/build.rs:23:5
[INFO] [stderr]     18:     0x560ec4b8bcd6 - build_script_build::main::hc8d430a621f88ac4
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nanny-sys-0.0.6/build.rs:41:5
[INFO] [stderr]     19:     0x560ec4b8b5fb - core::ops::function::FnOnce::call_once::h40afd989b4f4537f
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     20:     0x560ec4b8b59e - std::sys_common::backtrace::__rust_begin_short_backtrace::h4b832e06d9b710f6
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     21:     0x560ec4b8b361 - std::rt::lang_start::{{closure}}::hd5aa57156ae65135
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/rt.rs:66:18
[INFO] [stderr]     22:     0x560ec4bea477 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h7c92107c3c98a949
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     23:     0x560ec4bea477 - std::panicking::try::do_call::h7454c57e8fbf0cc1
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/panicking.rs:379:40
[INFO] [stderr]     24:     0x560ec4bea477 - std::panicking::try::he71cdc15ed83b5ec
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/panicking.rs:343:19
[INFO] [stderr]     25:     0x560ec4bea477 - std::panic::catch_unwind::hfc08ddb043e6e18c
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/panic.rs:396:14
[INFO] [stderr]     26:     0x560ec4bea477 - std::rt::lang_start_internal::he4958117ec6901fd
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/rt.rs:51:25
[INFO] [stderr]     27:     0x560ec4b8b337 - std::rt::lang_start::h470ff7d1ddc8867e
[INFO] [stderr]                                  at /rustc/bb9dbf1d07454a99066eabaabd5819851281494b/library/std/src/rt.rs:65:5
[INFO] [stderr]     28:     0x560ec4b8bd0a - main
[INFO] [stderr]     29:     0x7fa3926920b3 - __libc_start_main
[INFO] [stderr]     30:     0x560ec4b8b0be - _start
[INFO] [stderr]     31:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "43ed640ffeff648763fd3f1283276790675cad93f496969e165db6dbd8c6f1e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43ed640ffeff648763fd3f1283276790675cad93f496969e165db6dbd8c6f1e0", kill_on_drop: false }`
[INFO] [stdout] 43ed640ffeff648763fd3f1283276790675cad93f496969e165db6dbd8c6f1e0