[INFO] cloning repository https://github.com/cadet-robotics/mkprop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cadet-robotics/mkprop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcadet-robotics%2Fmkprop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcadet-robotics%2Fmkprop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4103a3b0a8bbe667f84c458c0f7b439aed234ce4
[INFO] checking cadet-robotics/mkprop against try#075992eda207e1647b699c8c8ada67b32ce7b115 for pr-77271
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcadet-robotics%2Fmkprop" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cadet-robotics/mkprop on toolchain 075992eda207e1647b699c8c8ada67b32ce7b115
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cadet-robotics/mkprop
[INFO] finished tweaking git repo https://github.com/cadet-robotics/mkprop
[INFO] tweaked toml for git repo https://github.com/cadet-robotics/mkprop written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/cadet-robotics/mkprop already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded diff v0.1.12
[INFO] [stderr]   Downloaded ena v0.14.0
[INFO] [stderr]   Downloaded lalrpop-util v0.19.0
[INFO] [stderr]   Downloaded new_debug_unreachable v1.0.4
[INFO] [stderr]   Downloaded string_cache v0.8.0
[INFO] [stderr]   Downloaded lalrpop v0.19.0
[INFO] [stderr]   Downloaded cesu8 v1.1.0
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a931a4c00ac86948aac89e4799d335c67bf4f5bf87142ad6ffd2a82471c1c828
[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" "a931a4c00ac86948aac89e4799d335c67bf4f5bf87142ad6ffd2a82471c1c828", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a931a4c00ac86948aac89e4799d335c67bf4f5bf87142ad6ffd2a82471c1c828", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a931a4c00ac86948aac89e4799d335c67bf4f5bf87142ad6ffd2a82471c1c828", kill_on_drop: false }`
[INFO] [stdout] a931a4c00ac86948aac89e4799d335c67bf4f5bf87142ad6ffd2a82471c1c828
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff3ab9f046d145dfa989e56920e8f3e200b07af04784b8786117606562a366cb
[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" "ff3ab9f046d145dfa989e56920e8f3e200b07af04784b8786117606562a366cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling siphasher v0.3.3
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking cesu8 v1.1.0
[INFO] [stderr]    Compiling ena v0.14.0
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]     Checking lalrpop-util v0.19.0
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling string_cache v0.8.0
[INFO] [stderr]    Compiling lalrpop v0.19.0
[INFO] [stderr]    Compiling mkprop v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `mkprop v0.1.0 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/mkprop-51cb47afcf75d21e/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   processing file `./src/parse/parse_inner.lalrpop`
[INFO] [stderr] 
[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" }', build.rs:7:10
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x564d7322aef0 - std::backtrace_rs::backtrace::libunwind::trace::he85dfb3ae4206056
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x564d7322aef0 - std::backtrace_rs::backtrace::trace_unsynchronized::h1ad28094d7b00c21
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x564d7322aef0 - std::sys_common::backtrace::_print_fmt::h901b54610713cd21
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x564d7322aef0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb0ad78ee1571f7e0
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x564d732498fc - core::fmt::write::h1857a60b204f1b6a
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/core/src/fmt/mod.rs:1080
[INFO] [stderr]      5:     0x564d732282c2 - std::io::Write::write_fmt::hf7b7d7b243f84a36
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/io/mod.rs:1516
[INFO] [stderr]      6:     0x564d7322d0bd - std::sys_common::backtrace::_print::hd093978a5287b8ff
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x564d7322d0bd - std::sys_common::backtrace::print::h20f46787581d56d7
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x564d7322d0bd - std::panicking::default_hook::{{closure}}::h486cbb4b82ffc357
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/panicking.rs:208
[INFO] [stderr]      9:     0x564d7322cd68 - std::panicking::default_hook::h4190c9e3edd4d591
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/panicking.rs:227
[INFO] [stderr]     10:     0x564d7322d7a1 - std::panicking::rust_panic_with_hook::h72e78719cdda225c
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/panicking.rs:577
[INFO] [stderr]     11:     0x564d7322d349 - std::panicking::begin_panic_handler::{{closure}}::h8bd07dbd34150a96
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/panicking.rs:484
[INFO] [stderr]     12:     0x564d7322b37c - std::sys_common::backtrace::__rust_end_short_backtrace::hdb6b3066ad29028a
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x564d7322d309 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/panicking.rs:483
[INFO] [stderr]     14:     0x564d73247f01 - core::panicking::panic_fmt::hb15d6f55e8472f62
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/core/src/panicking.rs:85
[INFO] [stderr]     15:     0x564d73247d23 - core::option::expect_none_failed::he492a18657d97593
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/core/src/option.rs:1234
[INFO] [stderr]     16:     0x564d7297f6b3 - core::result::Result<T,E>::unwrap::h71240bfc49b14cce
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/core/src/result.rs:973
[INFO] [stderr]     17:     0x564d7297f5b3 - build_script_build::main::hfc1c56ed51f15d56
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:4
[INFO] [stderr]     18:     0x564d7297f48b - core::ops::function::FnOnce::call_once::h739da12953bd671d
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/core/src/ops/function.rs:227
[INFO] [stderr]     19:     0x564d7297f7ee - std::sys_common::backtrace::__rust_begin_short_backtrace::h219eca68c2cdc648
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     20:     0x564d7297f441 - std::rt::lang_start::{{closure}}::hf9c58a9c92cb8356
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/rt.rs:66
[INFO] [stderr]     21:     0x564d7322db60 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h5e15f43ce28787f7
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/core/src/ops/function.rs:259
[INFO] [stderr]     22:     0x564d7322db60 - std::panicking::try::do_call::h764f1891769113e9
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/panicking.rs:381
[INFO] [stderr]     23:     0x564d7322db60 - std::panicking::try::h0f2fe4fdd5e0ad19
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/panicking.rs:345
[INFO] [stderr]     24:     0x564d7322db60 - std::panic::catch_unwind::h1634e40dd3a19f80
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/panic.rs:382
[INFO] [stderr]     25:     0x564d7322db60 - std::rt::lang_start_internal::h8d4bc7b854bbd5fe
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/rt.rs:51
[INFO] [stderr]     26:     0x564d7297f417 - std::rt::lang_start::h7e9d5e135cc4db3f
[INFO] [stderr]                                  at /rustc/075992eda207e1647b699c8c8ada67b32ce7b115/library/std/src/rt.rs:65
[INFO] [stderr]     27:     0x564d7297f60a - main
[INFO] [stderr]     28:     0x7f16bda1e0b3 - __libc_start_main
[INFO] [stderr]     29:     0x564d7297f0ce - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "ff3ab9f046d145dfa989e56920e8f3e200b07af04784b8786117606562a366cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff3ab9f046d145dfa989e56920e8f3e200b07af04784b8786117606562a366cb", kill_on_drop: false }`
[INFO] [stdout] ff3ab9f046d145dfa989e56920e8f3e200b07af04784b8786117606562a366cb