[INFO] cloning repository https://github.com/djog/Rust_Project_2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/djog/Rust_Project_2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdjog%2FRust_Project_2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdjog%2FRust_Project_2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 40658f70796dadbed22f4786a8e7bc634892b884
[INFO] testing djog/Rust_Project_2020 against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdjog%2FRust_Project_2020" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/djog/Rust_Project_2020 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/djog/Rust_Project_2020
[INFO] finished tweaking git repo https://github.com/djog/Rust_Project_2020
[INFO] tweaked toml for git repo https://github.com/djog/Rust_Project_2020 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/djog/Rust_Project_2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ad791a3e1fc663322785f4c353ded366c637bf1de61a9402566832a5b187fac
[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" "1ad791a3e1fc663322785f4c353ded366c637bf1de61a9402566832a5b187fac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ad791a3e1fc663322785f4c353ded366c637bf1de61a9402566832a5b187fac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ad791a3e1fc663322785f4c353ded366c637bf1de61a9402566832a5b187fac", kill_on_drop: false }`
[INFO] [stdout] 1ad791a3e1fc663322785f4c353ded366c637bf1de61a9402566832a5b187fac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01527eacebb1eb8dd2bd6670b1cd8c788f962383fdca1e4e0d663ac37d24d71c
[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" "01527eacebb1eb8dd2bd6670b1cd8c788f962383fdca1e4e0d663ac37d24d71c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling proc-macro2 v1.0.14
[INFO] [stderr]    Compiling syn v1.0.23
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling object v0.19.0
[INFO] [stderr]    Compiling downcast-rs v1.1.1
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling ahash v0.3.5
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling inventory v0.1.6
[INFO] [stderr]    Compiling xi-unicode v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling addr2line v0.12.1
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling lexical-core v0.4.6
[INFO] [stderr]    Compiling rustc_version_runtime v0.1.5
[INFO] [stderr] error: failed to run custom build command for `rustc_version_runtime v0.1.5`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/rustc_version_runtime-28f7e62860dad4f6/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc_version_runtime-0.1.5/build.rs:27:48
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5592ca406e37 - std::backtrace_rs::backtrace::libunwind::trace::hcd6e187547b8deec
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x5592ca406e37 - std::backtrace_rs::backtrace::trace_unsynchronized::hde10036eb783fbc7
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x5592ca406e37 - std::sys_common::backtrace::_print_fmt::h63987b8f86dfc82a
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x5592ca406e37 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hc33f3ac4cc9c4196
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x5592ca4216cc - core::fmt::write::hfdcdeb08fb2b3afa
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/fmt/mod.rs:1078:17
[INFO] [stderr]      5:     0x5592ca404862 - std::io::Write::write_fmt::h83a843778fa2a815
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/io/mod.rs:1519:15
[INFO] [stderr]      6:     0x5592ca408b75 - std::sys_common::backtrace::_print::hf179508b01f66878
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x5592ca408b75 - std::sys_common::backtrace::print::ha97d11adb39266a6
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x5592ca408b75 - std::panicking::default_hook::{{closure}}::h8da9985a98bd1582
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x5592ca4086ca - std::panicking::default_hook::hbc0ee792993c2ef2
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x5592ca409311 - std::panicking::rust_panic_with_hook::h9fb9cda33a10f084
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x5592ca408e57 - std::panicking::begin_panic_handler::{{closure}}::hf3e83396e085962e
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:497:13
[INFO] [stderr]     12:     0x5592ca4072fc - std::sys_common::backtrace::__rust_end_short_backtrace::hac151ac4c1e3252d
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x5592ca408db9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x5592ca420aa1 - core::panicking::panic_fmt::hf6d8a92b065b8f97
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x5592ca4208c3 - core::option::expect_none_failed::ha72f299eca314ad7
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/option.rs:1268:5
[INFO] [stderr]     16:     0x5592ca3cbf7b - core::result::Result<T,E>::unwrap::hfab5830935aeca61
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/result.rs:973:23
[INFO] [stderr]     17:     0x5592ca3c873c - build_script_build::main::hba02d452ddbffb05
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc_version_runtime-0.1.5/build.rs:27:17
[INFO] [stderr]     18:     0x5592ca3c9f9b - core::ops::function::FnOnce::call_once::h991408542650293e
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     19:     0x5592ca3ca18e - std::sys_common::backtrace::__rust_begin_short_backtrace::he79934fae059ce29
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     20:     0x5592ca3ca571 - std::rt::lang_start::{{closure}}::h2f2c38bd5611bc28
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/rt.rs:66:18
[INFO] [stderr]     21:     0x5592ca409737 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hb5ab992a536e3d7c
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     22:     0x5592ca409737 - std::panicking::try::do_call::h1bda883686bc1816
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:379:40
[INFO] [stderr]     23:     0x5592ca409737 - std::panicking::try::ha7167c079f243e71
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:343:19
[INFO] [stderr]     24:     0x5592ca409737 - std::panic::catch_unwind::he11c3de53f0b5853
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panic.rs:396:14
[INFO] [stderr]     25:     0x5592ca409737 - std::rt::lang_start_internal::h45c3666b51d25060
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/rt.rs:51:25
[INFO] [stderr]     26:     0x5592ca3ca547 - std::rt::lang_start::h00f6c8188b6ffe27
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/rt.rs:65:5
[INFO] [stderr]     27:     0x5592ca3c97fa - main
[INFO] [stderr]     28:     0x7f94782030b3 - __libc_start_main
[INFO] [stderr]     29:     0x5592ca3c80ae - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "01527eacebb1eb8dd2bd6670b1cd8c788f962383fdca1e4e0d663ac37d24d71c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01527eacebb1eb8dd2bd6670b1cd8c788f962383fdca1e4e0d663ac37d24d71c", kill_on_drop: false }`
[INFO] [stdout] 01527eacebb1eb8dd2bd6670b1cd8c788f962383fdca1e4e0d663ac37d24d71c