[INFO] cloning repository https://github.com/iQeda/MyRust-NeetCode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iQeda/MyRust-NeetCode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiQeda%2FMyRust-NeetCode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiQeda%2FMyRust-NeetCode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] db5e5d3adf94755e9b95dfcea2a220bcb5b71b7d
[INFO] checking iQeda/MyRust-NeetCode against try#6284d7b4bd27983dba388146648ab844ca7d032f for pr-152971
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiQeda%2FMyRust-NeetCode" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/iQeda/MyRust-NeetCode
[INFO] finished tweaking git repo https://github.com/iQeda/MyRust-NeetCode
[INFO] tweaked toml for git repo https://github.com/iQeda/MyRust-NeetCode written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/iQeda/MyRust-NeetCode on toolchain 6284d7b4bd27983dba388146648ab844ca7d032f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6284d7b4bd27983dba388146648ab844ca7d032f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/iQeda/MyRust-NeetCode 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" "+6284d7b4bd27983dba388146648ab844ca7d032f" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+6284d7b4bd27983dba388146648ab844ca7d032f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca9dc7683072aecd686e48b82efd068cf732b4085328fd2e13c861a48b3bf3e4
[INFO] running `Command { std: "docker" "start" "-a" "ca9dc7683072aecd686e48b82efd068cf732b4085328fd2e13c861a48b3bf3e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca9dc7683072aecd686e48b82efd068cf732b4085328fd2e13c861a48b3bf3e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca9dc7683072aecd686e48b82efd068cf732b4085328fd2e13c861a48b3bf3e4", kill_on_drop: false }`
[INFO] [stdout] ca9dc7683072aecd686e48b82efd068cf732b4085328fd2e13c861a48b3bf3e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+6284d7b4bd27983dba388146648ab844ca7d032f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0eaef57718536d33df6adeda8429528e672764c83cfde4ba30d84f19a01e7a2d
[INFO] running `Command { std: "docker" "start" "-a" "0eaef57718536d33df6adeda8429528e672764c83cfde4ba30d84f19a01e7a2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `leetcode 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/leetcode-ff6dc563b9aa7721/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-changed=problems/
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (56) panicked at build.rs:41:48:
[INFO] [stderr]   Failed to write lib.rs: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x615db36e4eda - std[1969066a15ec9922]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x615db36e4eda - std[1969066a15ec9922]::backtrace_rs::backtrace::trace_unsynchronized::<std[1969066a15ec9922]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x615db36e4eda - std[1969066a15ec9922]::sys::backtrace::_print_fmt
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/sys/backtrace.rs:74:9
[INFO] [stderr]      3:     0x615db36e4eda - <<std[1969066a15ec9922]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[e5d685cfac353eb8]::fmt::Display>::fmt
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/sys/backtrace.rs:44:26
[INFO] [stderr]      4:     0x615db36f5f7a - <core[e5d685cfac353eb8]::fmt::rt::Argument>::fmt
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]      5:     0x615db36f5f7a - core[e5d685cfac353eb8]::fmt::write
[INFO] [stderr]      6:     0x615db36e8e12 - std[1969066a15ec9922]::io::default_write_fmt::<std[1969066a15ec9922]::sys::stdio::unix::Stderr>
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x615db36e8e12 - <std[1969066a15ec9922]::sys::stdio::unix::Stderr as std[1969066a15ec9922]::io::Write>::write_fmt
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/io/mod.rs:1994:13
[INFO] [stderr]      8:     0x615db36cf8cf - <std[1969066a15ec9922]::sys::backtrace::BacktraceLock>::print
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/sys/backtrace.rs:47:9
[INFO] [stderr]      9:     0x615db36cf8cf - std[1969066a15ec9922]::panicking::default_hook::{closure#0}
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panicking.rs:292:27
[INFO] [stderr]     10:     0x615db36e0da1 - std[1969066a15ec9922]::panicking::default_hook
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panicking.rs:319:9
[INFO] [stderr]     11:     0x615db36e0f5b - std[1969066a15ec9922]::panicking::panic_with_hook
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panicking.rs:825:13
[INFO] [stderr]     12:     0x615db36cf988 - std[1969066a15ec9922]::panicking::panic_handler::{closure#0}
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panicking.rs:698:13
[INFO] [stderr]     13:     0x615db36c7539 - std[1969066a15ec9922]::sys::backtrace::__rust_end_short_backtrace::<std[1969066a15ec9922]::panicking::panic_handler::{closure#0}, !>
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/sys/backtrace.rs:182:18
[INFO] [stderr]     14:     0x615db36d01ed - __rustc[feed6f543e575900]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panicking.rs:689:5
[INFO] [stderr]     15:     0x615db36f67cc - core[e5d685cfac353eb8]::panicking::panic_fmt
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x615db36f65a2 - core[e5d685cfac353eb8]::result::unwrap_failed
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/core/src/result.rs:1867:5
[INFO] [stderr]     17:     0x615db36b68a0 - <core[e5d685cfac353eb8]::result::Result<(), std[1969066a15ec9922]::io::error::Error>>::expect
[INFO] [stderr]     18:     0x615db36b4bdd - build_script_build[3443452c8f8084f3]::main
[INFO] [stderr]     19:     0x615db36b9d93 - <fn() as core[e5d685cfac353eb8]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     20:     0x615db36b88b6 - std[1969066a15ec9922]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stderr]     21:     0x615db36b41a9 - std[1969066a15ec9922]::rt::lang_start::<()>::{closure#0}
[INFO] [stderr]     22:     0x615db36e0524 - <&dyn core[e5d685cfac353eb8]::ops::function::Fn<(), Output = i32> + core[e5d685cfac353eb8]::panic::unwind_safe::RefUnwindSafe + core[e5d685cfac353eb8]::marker::Sync as core[e5d685cfac353eb8]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     23:     0x615db36e0524 - std[1969066a15ec9922]::panicking::catch_unwind::do_call::<&dyn core[e5d685cfac353eb8]::ops::function::Fn<(), Output = i32> + core[e5d685cfac353eb8]::panic::unwind_safe::RefUnwindSafe + core[e5d685cfac353eb8]::marker::Sync, i32>
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panicking.rs:581:40
[INFO] [stderr]     24:     0x615db36e0524 - std[1969066a15ec9922]::panicking::catch_unwind::<i32, &dyn core[e5d685cfac353eb8]::ops::function::Fn<(), Output = i32> + core[e5d685cfac353eb8]::panic::unwind_safe::RefUnwindSafe + core[e5d685cfac353eb8]::marker::Sync>
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panicking.rs:544:19
[INFO] [stderr]     25:     0x615db36e0524 - std[1969066a15ec9922]::panic::catch_unwind::<&dyn core[e5d685cfac353eb8]::ops::function::Fn<(), Output = i32> + core[e5d685cfac353eb8]::panic::unwind_safe::RefUnwindSafe + core[e5d685cfac353eb8]::marker::Sync, i32>
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panic.rs:359:14
[INFO] [stderr]     26:     0x615db36e0524 - std[1969066a15ec9922]::rt::lang_start_internal::{closure#0}
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/rt.rs:175:24
[INFO] [stderr]     27:     0x615db36e0524 - std[1969066a15ec9922]::panicking::catch_unwind::do_call::<std[1969066a15ec9922]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panicking.rs:581:40
[INFO] [stderr]     28:     0x615db36e0524 - std[1969066a15ec9922]::panicking::catch_unwind::<isize, std[1969066a15ec9922]::rt::lang_start_internal::{closure#0}>
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panicking.rs:544:19
[INFO] [stderr]     29:     0x615db36e0524 - std[1969066a15ec9922]::panic::catch_unwind::<std[1969066a15ec9922]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/panic.rs:359:14
[INFO] [stderr]     30:     0x615db36e0524 - std[1969066a15ec9922]::rt::lang_start_internal
[INFO] [stderr]                                  at /rustc/6284d7b4bd27983dba388146648ab844ca7d032f/library/std/src/rt.rs:171:5
[INFO] [stderr]     31:     0x615db36b3c01 - std[1969066a15ec9922]::rt::lang_start::<()>
[INFO] [stderr]     32:     0x615db36b5e35 - main
[INFO] [stderr]     33:     0x72a0466621ca - <unknown>
[INFO] [stderr]     34:     0x72a04666228b - __libc_start_main
[INFO] [stderr]     35:     0x615db36b0535 - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "0eaef57718536d33df6adeda8429528e672764c83cfde4ba30d84f19a01e7a2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eaef57718536d33df6adeda8429528e672764c83cfde4ba30d84f19a01e7a2d", kill_on_drop: false }`
[INFO] [stdout] 0eaef57718536d33df6adeda8429528e672764c83cfde4ba30d84f19a01e7a2d