[INFO] cloning repository https://github.com/sinlov/rust_playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sinlov/rust_playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinlov%2Frust_playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinlov%2Frust_playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a83992f3c7464dd47f64c1723b8e8ece42c7df20
[INFO] checking sinlov/rust_playground against try#05c8870159e4f328578a970e125aa76d24f03b56 for pr-76219
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinlov%2Frust_playground" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sinlov/rust_playground on toolchain 05c8870159e4f328578a970e125aa76d24f03b56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sinlov/rust_playground
[INFO] finished tweaking git repo https://github.com/sinlov/rust_playground
[INFO] tweaked toml for git repo https://github.com/sinlov/rust_playground written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/sinlov/rust_playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded phf_codegen v0.7.24
[INFO] [stderr]   Downloaded backtrace v0.3.33
[INFO] [stderr]   Downloaded phf v0.7.24
[INFO] [stderr]   Downloaded multipart v0.13.6
[INFO] [stderr]   Downloaded safemem v0.3.1
[INFO] [stderr]   Downloaded autocfg v0.1.5
[INFO] [stderr]   Downloaded gzip-header v0.3.0
[INFO] [stderr]   Downloaded rouille v2.2.0
[INFO] [stderr]   Downloaded cc v1.0.38
[INFO] [stderr]   Downloaded syn v0.15.42
[INFO] [stderr]   Downloaded buf_redux v0.6.3
[INFO] [stderr]   Downloaded redox_users v0.3.0
[INFO] [stderr]   Downloaded twoway v0.1.8
[INFO] [stderr]   Downloaded chunked_transfer v0.3.1
[INFO] [stderr]   Downloaded filetime v0.2.6
[INFO] [stderr]   Downloaded mime_guess v1.8.7
[INFO] [stderr]   Downloaded libc v0.2.60
[INFO] [stderr]   Downloaded ascii v0.8.7
[INFO] [stderr]   Downloaded tiny_http v0.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "metadata" "--no-deps" "--format-version=1", 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] eb21e68f1673f96788864233c4656d3b183ec99d2a46537f707a17b7209a2fcd
[INFO] running `Command { std: "docker" "start" "-a" "eb21e68f1673f96788864233c4656d3b183ec99d2a46537f707a17b7209a2fcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb21e68f1673f96788864233c4656d3b183ec99d2a46537f707a17b7209a2fcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb21e68f1673f96788864233c4656d3b183ec99d2a46537f707a17b7209a2fcd", kill_on_drop: false }`
[INFO] [stdout] eb21e68f1673f96788864233c4656d3b183ec99d2a46537f707a17b7209a2fcd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "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] 99fea5437939cf279fe0c58a6ff98dbf48bb26ec196286dfd12f4ecebdfc0433
[INFO] running `Command { std: "docker" "start" "-a" "99fea5437939cf279fe0c58a6ff98dbf48bb26ec196286dfd12f4ecebdfc0433", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking safemem v0.3.1
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]    Compiling rust_playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]     Checking twoway v0.1.8
[INFO] [stderr] error: failed to run custom build command for `rust_playground v0.1.0 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/rust_playground-e8ed14b7979de0be/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Read-only file system (os error 30)', build.rs:13:22
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55ea7835bfc0 - std::backtrace_rs::backtrace::libunwind::trace::h452faf99f32e7c93
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x55ea7835bfc0 - std::backtrace_rs::backtrace::trace_unsynchronized::he40edc71437667a1
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x55ea7835bfc0 - std::sys_common::backtrace::_print_fmt::h6c51d6ade71f46bf
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x55ea7835bfc0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3cd15d7003dec37a
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x55ea78374d0c - core::fmt::write::h1857a60b204f1b6a
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/core/src/fmt/mod.rs:1082
[INFO] [stderr]      5:     0x55ea7835a867 - std::io::Write::write_fmt::hac61caff894c35ae
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/io/mod.rs:1517
[INFO] [stderr]      6:     0x55ea7835e0d0 - std::sys_common::backtrace::_print::haa2f390fb7957e3e
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x55ea7835e0d0 - std::sys_common::backtrace::print::h48c7cbbad9013bb1
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x55ea7835e0d0 - std::panicking::default_hook::{{closure}}::h8b7ff05a31e71d55
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/panicking.rs:208
[INFO] [stderr]      9:     0x55ea7835de1c - std::panicking::default_hook::h2f00c78800d98e4c
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/panicking.rs:227
[INFO] [stderr]     10:     0x55ea7835e733 - std::panicking::rust_panic_with_hook::h4eaa635e4694aef3
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/panicking.rs:577
[INFO] [stderr]     11:     0x55ea7835e309 - std::panicking::begin_panic_handler::{{closure}}::hec242f1b136b5ff2
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/panicking.rs:484
[INFO] [stderr]     12:     0x55ea7835c42c - std::sys_common::backtrace::__rust_end_short_backtrace::h1f3cc383ee6c0374
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x55ea7835e2c9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/panicking.rs:483
[INFO] [stderr]     14:     0x55ea7835e27b - std::panicking::begin_panic_fmt::hebfdcd945bbd27b1
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/panicking.rs:437
[INFO] [stderr]     15:     0x55ea783483a2 - build_script_build::main::h45217f47c020b482
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:13
[INFO] [stderr]     16:     0x55ea7834747b - core::ops::function::FnOnce::call_once::h4b0150ddd2d7e0b6
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/core/src/ops/function.rs:227
[INFO] [stderr]     17:     0x55ea783499ee - std::sys_common::backtrace::__rust_begin_short_backtrace::hf3bce26c0de486de
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     18:     0x55ea78347fc1 - std::rt::lang_start::{{closure}}::h3b6d359039172cc7
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/rt.rs:66
[INFO] [stderr]     19:     0x55ea7835eb31 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hecc21eb9018cc197
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/core/src/ops/function.rs:259
[INFO] [stderr]     20:     0x55ea7835eb31 - std::panicking::try::do_call::h174ad655d084b5c7
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/panicking.rs:381
[INFO] [stderr]     21:     0x55ea7835eb31 - std::panicking::try::h479e6054ce28de10
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/panicking.rs:345
[INFO] [stderr]     22:     0x55ea7835eb31 - std::panic::catch_unwind::hb558ddea2b3e9c45
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/panic.rs:382
[INFO] [stderr]     23:     0x55ea7835eb31 - std::rt::lang_start_internal::h163149047f0a8b61
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/rt.rs:51
[INFO] [stderr]     24:     0x55ea78347f97 - std::rt::lang_start::h4698be5f216320cf
[INFO] [stderr]                                  at /rustc/05c8870159e4f328578a970e125aa76d24f03b56/library/std/src/rt.rs:65
[INFO] [stderr]     25:     0x55ea7834847a - main
[INFO] [stderr]     26:     0x7f64b534e0b3 - __libc_start_main
[INFO] [stderr]     27:     0x55ea783450ae - _start
[INFO] [stderr]     28:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "99fea5437939cf279fe0c58a6ff98dbf48bb26ec196286dfd12f4ecebdfc0433", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99fea5437939cf279fe0c58a6ff98dbf48bb26ec196286dfd12f4ecebdfc0433", kill_on_drop: false }`
[INFO] [stdout] 99fea5437939cf279fe0c58a6ff98dbf48bb26ec196286dfd12f4ecebdfc0433