[INFO] cloning repository https://github.com/shorii/asset-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shorii/asset-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshorii%2Fasset-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshorii%2Fasset-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1d13bd2093d20ced2abacaa78663b488e7b3bb85
[INFO] checking shorii/asset-rs against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshorii%2Fasset-rs" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shorii/asset-rs on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shorii/asset-rs
[INFO] finished tweaking git repo https://github.com/shorii/asset-rs
[INFO] tweaked toml for git repo https://github.com/shorii/asset-rs written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/shorii/asset-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-8/source/example/Cargo.toml: file found to be present in multiple build targets: /workspace/builds/worker-8/source/example/./src/main.rs
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e883311fd201d7ec7607810c03d553bb0c1d1f50891c51f66a1114b88093d581
[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" "e883311fd201d7ec7607810c03d553bb0c1d1f50891c51f66a1114b88093d581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e883311fd201d7ec7607810c03d553bb0c1d1f50891c51f66a1114b88093d581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e883311fd201d7ec7607810c03d553bb0c1d1f50891c51f66a1114b88093d581", kill_on_drop: false }`
[INFO] [stdout] e883311fd201d7ec7607810c03d553bb0c1d1f50891c51f66a1114b88093d581
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d567d32b1362813f2664598c09fb1808778d576aa9f9e68965db1300275ea06b
[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" "d567d32b1362813f2664598c09fb1808778d576aa9f9e68965db1300275ea06b", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/example/Cargo.toml: file found to be present in multiple build targets: /opt/rustwide/workdir/example/./src/main.rs
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling hex-literal v0.3.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]     Checking proc-macro2 v1.0.26
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]     Checking asset v0.1.0 (/opt/rustwide/workdir/asset)
[INFO] [stderr]    Compiling example v0.1.0 (/opt/rustwide/workdir/example)
[INFO] [stderr] error: failed to run custom build command for `example v0.1.0 (/opt/rustwide/workdir/example)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/example-23af016fa5485b05/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', example/build.rs:7:51
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5578273e7120 - std::backtrace_rs::backtrace::libunwind::trace::hdcf4f90f85129e83
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x5578273e7120 - std::backtrace_rs::backtrace::trace_unsynchronized::h2669e30cb82f6732
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x5578273e7120 - std::sys_common::backtrace::_print_fmt::hfbda19e17f6db318
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x5578273e7120 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1a8751bf59281272
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x5578274023bf - core::fmt::write::h7aa6cd0067dca82a
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/core/src/fmt/mod.rs:1094:17
[INFO] [stderr]      5:     0x5578273e5205 - std::io::Write::write_fmt::hd7dd3a1df9b6befb
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/io/mod.rs:1584:15
[INFO] [stderr]      6:     0x5578273e8fdb - std::sys_common::backtrace::_print::h551e9ec8a9fa8106
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x5578273e8fdb - std::sys_common::backtrace::print::ha4b1c5e95fa040b3
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x5578273e8fdb - std::panicking::default_hook::{{closure}}::h0b34c9ab7fb9f857
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x5578273e8abd - std::panicking::default_hook::h3067e8318decd17a
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x5578273e958d - std::panicking::rust_panic_with_hook::h81b8facc50f34daa
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x5578273e9157 - std::panicking::begin_panic_handler::{{closure}}::ha376ab85d95a000e
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/panicking.rs:495:13
[INFO] [stderr]     12:     0x5578273e75dc - std::sys_common::backtrace::__rust_end_short_backtrace::h6795c8afdd1a77e6
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x5578273e90e9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x557827380ec1 - core::panicking::panic_fmt::hbe99dddd3092ba3c
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x557827380e0d - core::panicking::panic::h3de4db67bd397eb3
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x55782738d274 - core::option::Option<T>::unwrap::hfa1034c24625d42e
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/core/src/option.rs:386:21
[INFO] [stderr]     17:     0x557827393f03 - build_script_build::main::hfced948b2b92725b
[INFO] [stderr]                                  at /opt/rustwide/workdir/example/build.rs:7:25
[INFO] [stderr]     18:     0x55782738d3fb - core::ops::function::FnOnce::call_once::hb3028ae9241e204e
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     19:     0x55782739425e - std::sys_common::backtrace::__rust_begin_short_backtrace::ha48e0e6c365431cc
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     20:     0x55782738d371 - std::rt::lang_start::{{closure}}::hf6b6b9d77b181e04
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/rt.rs:49:18
[INFO] [stderr]     21:     0x5578273e9a8a - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h3b8c329143d7638a
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     22:     0x5578273e9a8a - std::panicking::try::do_call::h4b72c261b4eefc1b
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/panicking.rs:379:40
[INFO] [stderr]     23:     0x5578273e9a8a - std::panicking::try::h703d31b7896cbd49
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/panicking.rs:343:19
[INFO] [stderr]     24:     0x5578273e9a8a - std::panic::catch_unwind::h37cad9b35388a915
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/panic.rs:431:14
[INFO] [stderr]     25:     0x5578273e9a8a - std::rt::lang_start_internal::hab5a8a909af4f90e
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/rt.rs:34:21
[INFO] [stderr]     26:     0x55782738d350 - std::rt::lang_start::h2f6519c578e62ba4
[INFO] [stderr]                                  at /rustc/6f8a6450478f69b8510c8976ab6c2a70b3b0e47c/library/std/src/rt.rs:48:5
[INFO] [stderr]     27:     0x5578273941fc - main
[INFO] [stderr]     28:     0x7efc7a9ba0b3 - __libc_start_main
[INFO] [stderr]     29:     0x5578273815fe - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "d567d32b1362813f2664598c09fb1808778d576aa9f9e68965db1300275ea06b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d567d32b1362813f2664598c09fb1808778d576aa9f9e68965db1300275ea06b", kill_on_drop: false }`
[INFO] [stdout] d567d32b1362813f2664598c09fb1808778d576aa9f9e68965db1300275ea06b