[INFO] cloning repository https://github.com/StappsWorld/Percival
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/StappsWorld/Percival" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStappsWorld%2FPercival", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStappsWorld%2FPercival'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ef0d556f823bb06ae2c19cae632b34ec27e9f98
[INFO] building StappsWorld/Percival against try#58b1b3c5342a414c161338871f8004258ccef2a7 for pr-149937
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStappsWorld%2FPercival" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/StappsWorld/Percival
[INFO] finished tweaking git repo https://github.com/StappsWorld/Percival
[INFO] tweaked toml for git repo https://github.com/StappsWorld/Percival written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/StappsWorld/Percival on toolchain 58b1b3c5342a414c161338871f8004258ccef2a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/StappsWorld/Percival already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lalrpop-util v0.19.5
[INFO] [stderr]   Downloaded siphasher v0.3.5
[INFO] [stderr]   Downloaded ascii-canvas v2.0.0
[INFO] [stderr]   Downloaded itertools v0.10.0
[INFO] [stderr]   Downloaded lalrpop v0.19.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb6961edb9ed365941ffc86c7239706d09b3620f9fb7e6d71ac1ae83ae9a7214
[INFO] running `Command { std: "docker" "start" "-a" "cb6961edb9ed365941ffc86c7239706d09b3620f9fb7e6d71ac1ae83ae9a7214", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb6961edb9ed365941ffc86c7239706d09b3620f9fb7e6d71ac1ae83ae9a7214", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb6961edb9ed365941ffc86c7239706d09b3620f9fb7e6d71ac1ae83ae9a7214", kill_on_drop: false }`
[INFO] [stdout] cb6961edb9ed365941ffc86c7239706d09b3620f9fb7e6d71ac1ae83ae9a7214
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ccf6992d515f60d8e76cfd99b4708ba0a5485199a8b22eabc80d915e0fb6552d
[INFO] running `Command { std: "docker" "start" "-a" "ccf6992d515f60d8e76cfd99b4708ba0a5485199a8b22eabc80d915e0fb6552d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling pico-args v0.4.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling itertools v0.10.0
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling string_cache v0.8.1
[INFO] [stderr]    Compiling ena v0.14.0
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling lalrpop-util v0.19.5
[INFO] [stderr]    Compiling lalrpop v0.19.5
[INFO] [stderr]    Compiling percival v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `percival v0.1.0 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/percival-e6201afab1413eb2/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   processing file `./src/parser/hc.lalrpop`
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (498) panicked at build.rs:9:10:
[INFO] [stderr]   called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x61b5f287f6c2 - std[42cfb3e4170ecfea]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x61b5f287f6c2 - std[42cfb3e4170ecfea]::backtrace_rs::backtrace::trace_unsynchronized::<std[42cfb3e4170ecfea]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x61b5f287f6c2 - std[42cfb3e4170ecfea]::sys::backtrace::_print_fmt
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/sys/backtrace.rs:68:9
[INFO] [stderr]      3:     0x61b5f287f6c2 - <<std[42cfb3e4170ecfea]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[3effd42582ceaf9c]::fmt::Display>::fmt
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/sys/backtrace.rs:38:26
[INFO] [stderr]      4:     0x61b5f2895027 - <core[3effd42582ceaf9c]::fmt::rt::Argument>::fmt
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]      5:     0x61b5f2895027 - core[3effd42582ceaf9c]::fmt::write
[INFO] [stderr]      6:     0x61b5f28854b6 - std[42cfb3e4170ecfea]::io::default_write_fmt::<std[42cfb3e4170ecfea]::sys::stdio::unix::Stderr>
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/io/mod.rs:614:11
[INFO] [stderr]      7:     0x61b5f28854b6 - <std[42cfb3e4170ecfea]::sys::stdio::unix::Stderr as std[42cfb3e4170ecfea]::io::Write>::write_fmt
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/io/mod.rs:1969:13
[INFO] [stderr]      8:     0x61b5f2868a6f - <std[42cfb3e4170ecfea]::sys::backtrace::BacktraceLock>::print
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/sys/backtrace.rs:41:9
[INFO] [stderr]      9:     0x61b5f2868a6f - std[42cfb3e4170ecfea]::panicking::default_hook::{closure#0}
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panicking.rs:292:27
[INFO] [stderr]     10:     0x61b5f287b021 - std[42cfb3e4170ecfea]::panicking::default_hook
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panicking.rs:319:9
[INFO] [stderr]     11:     0x61b5f287b1db - std[42cfb3e4170ecfea]::panicking::panic_with_hook
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panicking.rs:825:13
[INFO] [stderr]     12:     0x61b5f2868b28 - std[42cfb3e4170ecfea]::panicking::panic_handler::{closure#0}
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panicking.rs:698:13
[INFO] [stderr]     13:     0x61b5f285dbf9 - std[42cfb3e4170ecfea]::sys::backtrace::__rust_end_short_backtrace::<std[42cfb3e4170ecfea]::panicking::panic_handler::{closure#0}, !>
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/sys/backtrace.rs:176:18
[INFO] [stderr]     14:     0x61b5f286962d - __rustc[3e12d0338d47dec3]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panicking.rs:689:5
[INFO] [stderr]     15:     0x61b5f28956ec - core[3effd42582ceaf9c]::panicking::panic_fmt
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x61b5f2895462 - core[3effd42582ceaf9c]::result::unwrap_failed
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/core/src/result.rs:1867:5
[INFO] [stderr]     17:     0x61b5f22f3636 - build_script_build[dc8f814bbe6d2be6]::main
[INFO] [stderr]     18:     0x61b5f22f3e43 - <fn() as core[3effd42582ceaf9c]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     19:     0x61b5f22f33c6 - std[42cfb3e4170ecfea]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stderr]     20:     0x61b5f22f33d9 - std[42cfb3e4170ecfea]::rt::lang_start::<()>::{closure#0}
[INFO] [stderr]     21:     0x61b5f287a506 - <&dyn core[3effd42582ceaf9c]::ops::function::Fn<(), Output = i32> + core[3effd42582ceaf9c]::panic::unwind_safe::RefUnwindSafe + core[3effd42582ceaf9c]::marker::Sync as core[3effd42582ceaf9c]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     22:     0x61b5f287a506 - std[42cfb3e4170ecfea]::panicking::catch_unwind::do_call::<&dyn core[3effd42582ceaf9c]::ops::function::Fn<(), Output = i32> + core[3effd42582ceaf9c]::panic::unwind_safe::RefUnwindSafe + core[3effd42582ceaf9c]::marker::Sync, i32>
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panicking.rs:581:40
[INFO] [stderr]     23:     0x61b5f287a506 - std[42cfb3e4170ecfea]::panicking::catch_unwind::<i32, &dyn core[3effd42582ceaf9c]::ops::function::Fn<(), Output = i32> + core[3effd42582ceaf9c]::panic::unwind_safe::RefUnwindSafe + core[3effd42582ceaf9c]::marker::Sync>
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panicking.rs:544:19
[INFO] [stderr]     24:     0x61b5f287a506 - std[42cfb3e4170ecfea]::panic::catch_unwind::<&dyn core[3effd42582ceaf9c]::ops::function::Fn<(), Output = i32> + core[3effd42582ceaf9c]::panic::unwind_safe::RefUnwindSafe + core[3effd42582ceaf9c]::marker::Sync, i32>
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panic.rs:359:14
[INFO] [stderr]     25:     0x61b5f287a506 - std[42cfb3e4170ecfea]::rt::lang_start_internal::{closure#0}
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/rt.rs:175:24
[INFO] [stderr]     26:     0x61b5f287a506 - std[42cfb3e4170ecfea]::panicking::catch_unwind::do_call::<std[42cfb3e4170ecfea]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panicking.rs:581:40
[INFO] [stderr]     27:     0x61b5f287a506 - std[42cfb3e4170ecfea]::panicking::catch_unwind::<isize, std[42cfb3e4170ecfea]::rt::lang_start_internal::{closure#0}>
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panicking.rs:544:19
[INFO] [stderr]     28:     0x61b5f287a506 - std[42cfb3e4170ecfea]::panic::catch_unwind::<std[42cfb3e4170ecfea]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/panic.rs:359:14
[INFO] [stderr]     29:     0x61b5f287a506 - std[42cfb3e4170ecfea]::rt::lang_start_internal
[INFO] [stderr]                                  at /rustc/58b1b3c5342a414c161338871f8004258ccef2a7/library/std/src/rt.rs:171:5
[INFO] [stderr]     30:     0x61b5f22f2e11 - std[42cfb3e4170ecfea]::rt::lang_start::<()>
[INFO] [stderr]     31:     0x61b5f22f3ea5 - main
[INFO] [stderr]     32:     0x703a3362c1ca - <unknown>
[INFO] [stderr]     33:     0x703a3362c28b - __libc_start_main
[INFO] [stderr]     34:     0x61b5f22f2be5 - _start
[INFO] [stderr]     35:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "ccf6992d515f60d8e76cfd99b4708ba0a5485199a8b22eabc80d915e0fb6552d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccf6992d515f60d8e76cfd99b4708ba0a5485199a8b22eabc80d915e0fb6552d", kill_on_drop: false }`
[INFO] [stdout] ccf6992d515f60d8e76cfd99b4708ba0a5485199a8b22eabc80d915e0fb6552d