[INFO] cloning repository https://github.com/karv1c/test-gen
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/karv1c/test-gen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkarv1c%2Ftest-gen", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkarv1c%2Ftest-gen'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 00e6cbb1b2394b8cd781c7ad24697de9578facc1
[INFO] checking karv1c/test-gen against 65c7d39f9c2b9d5c316725cb48fa3d360c64c663 for pr-161253
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkarv1c%2Ftest-gen" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/karv1c/test-gen
[INFO] finished tweaking git repo https://github.com/karv1c/test-gen
[INFO] tweaked toml for git repo https://github.com/karv1c/test-gen written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/karv1c/test-gen on toolchain 65c7d39f9c2b9d5c316725cb48fa3d360c64c663
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+65c7d39f9c2b9d5c316725cb48fa3d360c64c663" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/karv1c/test-gen 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" "+65c7d39f9c2b9d5c316725cb48fa3d360c64c663" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 06e11f2e43608a0247a0b0588f850d24b64e76cdf9bad49856dc583fc67e615e
[INFO] running `Command { std: "docker" "start" "06e11f2e43608a0247a0b0588f850d24b64e76cdf9bad49856dc583fc67e615e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06e11f2e43608a0247a0b0588f850d24b64e76cdf9bad49856dc583fc67e615e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "06e11f2e43608a0247a0b0588f850d24b64e76cdf9bad49856dc583fc67e615e" "/opt/rustwide/cargo-home/bin/cargo" "+65c7d39f9c2b9d5c316725cb48fa3d360c64c663" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06e11f2e43608a0247a0b0588f850d24b64e76cdf9bad49856dc583fc67e615e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "06e11f2e43608a0247a0b0588f850d24b64e76cdf9bad49856dc583fc67e615e" "/opt/rustwide/cargo-home/bin/cargo" "+65c7d39f9c2b9d5c316725cb48fa3d360c64c663" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling test-gen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `test-gen 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/test-gen/e172db81d6e7e539/out/build_script_build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (84) panicked at build.rs:5:89:
[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:     0x5f5c65b3da11 - std[8d5bb868c04bcd7f]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x5f5c65b3da11 - std[8d5bb868c04bcd7f]::backtrace_rs::backtrace::trace_unsynchronized::<std[8d5bb868c04bcd7f]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x5f5c65b3da11 - std[8d5bb868c04bcd7f]::sys::backtrace::_print_fmt
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/sys/backtrace.rs:74:9
[INFO] [stderr]      3:     0x5f5c65b3da11 - <<std[8d5bb868c04bcd7f]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[e740b1982408edde]::fmt::Display>::fmt
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/sys/backtrace.rs:44:26
[INFO] [stderr]      4:     0x5f5c65b4ddaa - <core[e740b1982408edde]::fmt::rt::Argument>::fmt
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]      5:     0x5f5c65b4ddaa - core[e740b1982408edde]::fmt::write
[INFO] [stderr]      6:     0x5f5c65b40bec - core[e740b1982408edde]::io::write::default_write_fmt::<std[8d5bb868c04bcd7f]::sys::stdio::unix::Stderr>
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/core/src/io/write.rs:402:11
[INFO] [stderr]      7:     0x5f5c65b40bec - <std[8d5bb868c04bcd7f]::sys::stdio::unix::Stderr as core[e740b1982408edde]::io::write::Write>::write_fmt
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/core/src/io/write.rs:335:13
[INFO] [stderr]      8:     0x5f5c65b27df6 - <std[8d5bb868c04bcd7f]::sys::backtrace::BacktraceLock>::print
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/sys/backtrace.rs:47:9
[INFO] [stderr]      9:     0x5f5c65b27df6 - std[8d5bb868c04bcd7f]::panicking::default_hook::{closure#0}
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panicking.rs:290:27
[INFO] [stderr]     10:     0x5f5c65b3a521 - std[8d5bb868c04bcd7f]::panicking::default_hook
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panicking.rs:317:9
[INFO] [stderr]     11:     0x5f5c65b3a6db - std[8d5bb868c04bcd7f]::panicking::panic_with_hook
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panicking.rs:812:13
[INFO] [stderr]     12:     0x5f5c65b27ea2 - std[8d5bb868c04bcd7f]::panicking::panic_handler::{closure#0}
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panicking.rs:686:13
[INFO] [stderr]     13:     0x5f5c65b21069 - std[8d5bb868c04bcd7f]::sys::backtrace::__rust_end_short_backtrace::<std[8d5bb868c04bcd7f]::panicking::panic_handler::{closure#0}, !>
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/sys/backtrace.rs:182:18
[INFO] [stderr]     14:     0x5f5c65b285ed - __rustc[9043af6d6c019966]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panicking.rs:677:5
[INFO] [stderr]     15:     0x5f5c65b4e49c - core[e740b1982408edde]::panicking::panic_fmt
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x5f5c65b4e272 - core[e740b1982408edde]::result::unwrap_failed
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/core/src/result.rs:1869:5
[INFO] [stderr]     17:     0x5f5c65b1576a - build_script_build[1289e27d8f791399]::main
[INFO] [stderr]     18:     0x5f5c65b16b93 - <fn() as core[e740b1982408edde]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     19:     0x5f5c65b1520e - std[8d5bb868c04bcd7f]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stderr]     20:     0x5f5c65b15609 - std[8d5bb868c04bcd7f]::rt::lang_start::<()>::{closure#0}
[INFO] [stderr]     21:     0x5f5c65b39cc8 - <&dyn core[e740b1982408edde]::ops::function::Fn<(), Output = i32> + core[e740b1982408edde]::marker::Sync + core[e740b1982408edde]::panic::unwind_safe::RefUnwindSafe as core[e740b1982408edde]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     22:     0x5f5c65b39cc8 - std[8d5bb868c04bcd7f]::panicking::catch_unwind::do_call::<&dyn core[e740b1982408edde]::ops::function::Fn<(), Output = i32> + core[e740b1982408edde]::marker::Sync + core[e740b1982408edde]::panic::unwind_safe::RefUnwindSafe, i32>
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panicking.rs:574:43
[INFO] [stderr]     23:     0x5f5c65b39cc8 - std[8d5bb868c04bcd7f]::panicking::catch_unwind::<i32, &dyn core[e740b1982408edde]::ops::function::Fn<(), Output = i32> + core[e740b1982408edde]::marker::Sync + core[e740b1982408edde]::panic::unwind_safe::RefUnwindSafe>
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panicking.rs:542:19
[INFO] [stderr]     24:     0x5f5c65b39cc8 - std[8d5bb868c04bcd7f]::panic::catch_unwind::<&dyn core[e740b1982408edde]::ops::function::Fn<(), Output = i32> + core[e740b1982408edde]::marker::Sync + core[e740b1982408edde]::panic::unwind_safe::RefUnwindSafe, i32>
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panic.rs:359:14
[INFO] [stderr]     25:     0x5f5c65b39cc8 - std[8d5bb868c04bcd7f]::rt::lang_start_internal::{closure#0}
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/rt.rs:175:24
[INFO] [stderr]     26:     0x5f5c65b39cc8 - std[8d5bb868c04bcd7f]::panicking::catch_unwind::do_call::<std[8d5bb868c04bcd7f]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panicking.rs:574:43
[INFO] [stderr]     27:     0x5f5c65b39cc8 - std[8d5bb868c04bcd7f]::panicking::catch_unwind::<isize, std[8d5bb868c04bcd7f]::rt::lang_start_internal::{closure#0}>
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panicking.rs:542:19
[INFO] [stderr]     28:     0x5f5c65b39cc8 - std[8d5bb868c04bcd7f]::panic::catch_unwind::<std[8d5bb868c04bcd7f]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/panic.rs:359:14
[INFO] [stderr]     29:     0x5f5c65b39cc8 - std[8d5bb868c04bcd7f]::rt::lang_start_internal
[INFO] [stderr]                                  at /rustc/65c7d39f9c2b9d5c316725cb48fa3d360c64c663/library/std/src/rt.rs:171:5
[INFO] [stderr]     30:     0x5f5c65b150f1 - std[8d5bb868c04bcd7f]::rt::lang_start::<()>
[INFO] [stderr]     31:     0x5f5c65b16f65 - main
[INFO] [stderr]     32:     0x7d5f4b5f0601 - <unknown>
[INFO] [stderr]     33:     0x7d5f4b5f0718 - __libc_start_main
[INFO] [stderr]     34:     0x5f5c65b14fa5 - _start
[INFO] [stderr]     35:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "06e11f2e43608a0247a0b0588f850d24b64e76cdf9bad49856dc583fc67e615e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06e11f2e43608a0247a0b0588f850d24b64e76cdf9bad49856dc583fc67e615e", kill_on_drop: false }`
[INFO] [stdout] 06e11f2e43608a0247a0b0588f850d24b64e76cdf9bad49856dc583fc67e615e