[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 master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshorii%2Fasset-rs" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shorii/asset-rs on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-14/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-14/source/example/Cargo.toml: file found to be present in multiple build targets: /workspace/builds/worker-14/source/example/./src/main.rs
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa0d88d5c47325bcf940efce90ac03e7dbc3813628fdbd9327dba2492e6ef4e5
[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" "aa0d88d5c47325bcf940efce90ac03e7dbc3813628fdbd9327dba2492e6ef4e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa0d88d5c47325bcf940efce90ac03e7dbc3813628fdbd9327dba2492e6ef4e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa0d88d5c47325bcf940efce90ac03e7dbc3813628fdbd9327dba2492e6ef4e5", kill_on_drop: false }`
[INFO] [stdout] aa0d88d5c47325bcf940efce90ac03e7dbc3813628fdbd9327dba2492e6ef4e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 50b5a77f977149700b28840ec69dd84e735359a3c9c9567e35d006e2eb500c4e
[INFO] running `Command { std: "docker" "start" "-a" "50b5a77f977149700b28840ec69dd84e735359a3c9c9567e35d006e2eb500c4e", 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 proc-macro2 v1.0.26
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]     Checking getrandom v0.2.2
[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-3b3e5514fb3b8935/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:     0x55c4b6c446f0 - std::backtrace_rs::backtrace::libunwind::trace::h706b838f5bbd876b
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55c4b6c446f0 - std::backtrace_rs::backtrace::trace_unsynchronized::hc15f29ae7822b7b8
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55c4b6c446f0 - std::sys_common::backtrace::_print_fmt::h7c580c971f91926c
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55c4b6c446f0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h2a772198c4032452
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55c4b6c5f28c - core::fmt::write::h9a6d9c74526a6c1b
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/core/src/fmt/mod.rs:1115:17
[INFO] [stderr]      5:     0x55c4b6c42775 - std::io::Write::write_fmt::h00f38d9eb2c32e02
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/io/mod.rs:1663:15
[INFO] [stderr]      6:     0x55c4b6c4659b - std::sys_common::backtrace::_print::h5b3c171e6f864ae4
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55c4b6c4659b - std::sys_common::backtrace::print::h93b9e9ed2a98e611
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55c4b6c4659b - std::panicking::default_hook::{{closure}}::hd8da92bb68d520c5
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x55c4b6c46071 - std::panicking::default_hook::hdbc8b2951c5afbab
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x55c4b6c46c64 - std::panicking::rust_panic_with_hook::h8a4c841655926f4e
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panicking.rs:622:17
[INFO] [stderr]     11:     0x55c4b6c46717 - std::panicking::begin_panic_handler::{{closure}}::h471b6bc74904b7b0
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panicking.rs:517:13
[INFO] [stderr]     12:     0x55c4b6c44bec - std::sys_common::backtrace::__rust_end_short_backtrace::h309f5c707f29932f
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55c4b6c466a9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panicking.rs:515:5
[INFO] [stderr]     14:     0x55c4b6be20d1 - core::panicking::panic_fmt::hcf5f6d96e1dd7099
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x55c4b6be201d - core::panicking::panic::hd695e3b1d0dd4ef4
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x55c4b6bed646 - core::option::Option<T>::unwrap::h885bb3c42d755e50
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/core/src/option.rs:388:21
[INFO] [stderr]     17:     0x55c4b6bed793 - build_script_build::main::hca0a38f31506f1f9
[INFO] [stderr]                                  at /opt/rustwide/workdir/example/build.rs:7:25
[INFO] [stderr]     18:     0x55c4b6bf612b - core::ops::function::FnOnce::call_once::h33f3eb150fee151c
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     19:     0x55c4b6bf42ee - std::sys_common::backtrace::__rust_begin_short_backtrace::h943be22c7afd12d7
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     20:     0x55c4b6bf4411 - std::rt::lang_start::{{closure}}::h3240d148fbc199df
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/rt.rs:63:18
[INFO] [stderr]     21:     0x55c4b6c4726a - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hcbe5785d54a49ce2
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     22:     0x55c4b6c4726a - std::panicking::try::do_call::h1c15e7ee8563c29d
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panicking.rs:401:40
[INFO] [stderr]     23:     0x55c4b6c4726a - std::panicking::try::hb8b07cef009cb4fc
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panicking.rs:365:19
[INFO] [stderr]     24:     0x55c4b6c4726a - std::panic::catch_unwind::h65a8efbe596bcbb1
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panic.rs:434:14
[INFO] [stderr]     25:     0x55c4b6c4726a - std::rt::lang_start_internal::{{closure}}::h66ded7ab0f18e9fb
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/rt.rs:45:48
[INFO] [stderr]     26:     0x55c4b6c4726a - std::panicking::try::do_call::h29cafa65efb3f3f3
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panicking.rs:401:40
[INFO] [stderr]     27:     0x55c4b6c4726a - std::panicking::try::h412fc5378b4dbfc4
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panicking.rs:365:19
[INFO] [stderr]     28:     0x55c4b6c4726a - std::panic::catch_unwind::h555def6aac5bf192
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/panic.rs:434:14
[INFO] [stderr]     29:     0x55c4b6c4726a - std::rt::lang_start_internal::hfff48202d7fee6e3
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/rt.rs:45:20
[INFO] [stderr]     30:     0x55c4b6bf43e0 - std::rt::lang_start::h1fc8a98a2d66db47
[INFO] [stderr]                                  at /rustc/dfd7b8d03fb93d0e03147d28b3be6d93260fa94d/library/std/src/rt.rs:62:5
[INFO] [stderr]     31:     0x55c4b6beda9c - main
[INFO] [stderr]     32:     0x7f546df4c0b3 - __libc_start_main
[INFO] [stderr]     33:     0x55c4b6be286e - _start
[INFO] [stderr]     34:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "50b5a77f977149700b28840ec69dd84e735359a3c9c9567e35d006e2eb500c4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50b5a77f977149700b28840ec69dd84e735359a3c9c9567e35d006e2eb500c4e", kill_on_drop: false }`
[INFO] [stdout] 50b5a77f977149700b28840ec69dd84e735359a3c9c9567e35d006e2eb500c4e