[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 try#51000a35bc99aeffdc092bf2226ab562eedb9eff for pr-135899
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkarv1c%2Ftest-gen" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/karv1c/test-gen on toolchain 51000a35bc99aeffdc092bf2226ab562eedb9eff
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+51000a35bc99aeffdc092bf2226ab562eedb9eff" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-2-tc2/source/Cargo.toml
[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" "+51000a35bc99aeffdc092bf2226ab562eedb9eff" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:6475c868a6d27846ca172efb246699580b64b57a5b3744ef73949e850a31b38a" "/opt/rustwide/cargo-home/bin/cargo" "+51000a35bc99aeffdc092bf2226ab562eedb9eff" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 38d1e328fd781793decfa07c820a7e336170b922798cb9ab720fb897328ee105
[INFO] running `Command { std: "docker" "start" "-a" "38d1e328fd781793decfa07c820a7e336170b922798cb9ab720fb897328ee105", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38d1e328fd781793decfa07c820a7e336170b922798cb9ab720fb897328ee105", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38d1e328fd781793decfa07c820a7e336170b922798cb9ab720fb897328ee105", kill_on_drop: false }`
[INFO] [stdout] 38d1e328fd781793decfa07c820a7e336170b922798cb9ab720fb897328ee105
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:6475c868a6d27846ca172efb246699580b64b57a5b3744ef73949e850a31b38a" "/opt/rustwide/cargo-home/bin/cargo" "+51000a35bc99aeffdc092bf2226ab562eedb9eff" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f776d8939cad615fac70e61a77599d3e818a0f0b409cb4e1a190e5eb59b0205a
[INFO] running `Command { std: "docker" "start" "-a" "f776d8939cad615fac70e61a77599d3e818a0f0b409cb4e1a190e5eb59b0205a", 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/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' 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:     0x5a2e8640c0b2 - std::backtrace_rs::backtrace::libunwind::trace::ha589438cf9d3742b
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x5a2e8640c0b2 - std::backtrace_rs::backtrace::trace_unsynchronized::h0353f25e0529d0ca
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x5a2e8640c0b2 - std::sys::backtrace::_print_fmt::hf72eb6789361a7af
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x5a2e8640c0b2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h5f7f3d134ce78ca0
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x5a2e86429543 - core::fmt::rt::Argument::fmt::h495a83581e15689b
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/core/src/fmt/rt.rs:185:76
[INFO] [stderr]      5:     0x5a2e86429543 - core::fmt::write::h06f68f45af9d16b3
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/core/src/fmt/mod.rs:1449:21
[INFO] [stderr]      6:     0x5a2e86409a33 - std::io::Write::write_fmt::h3e56d22447b21ebd
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/io/mod.rs:1890:15
[INFO] [stderr]      7:     0x5a2e8640bf02 - std::sys::backtrace::BacktraceLock::print::hd8a8fadd85557a37
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      8:     0x5a2e8640ce22 - std::panicking::default_hook::{{closure}}::h010c031927d19086
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panicking.rs:300:22
[INFO] [stderr]      9:     0x5a2e8640cc25 - std::panicking::default_hook::h1ea89663d5727653
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panicking.rs:327:9
[INFO] [stderr]     10:     0x5a2e8640d6f2 - std::panicking::rust_panic_with_hook::h9328d1642470e0ef
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panicking.rs:833:13
[INFO] [stderr]     11:     0x5a2e8640d58a - std::panicking::begin_panic_handler::{{closure}}::h6397a4298eff6b73
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panicking.rs:706:13
[INFO] [stderr]     12:     0x5a2e8640c5a9 - std::sys::backtrace::__rust_end_short_backtrace::h7802b8296539eacc
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/sys/backtrace.rs:168:18
[INFO] [stderr]     13:     0x5a2e8640d21d - __rustc[20dda317529ef0da]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panicking.rs:697:5
[INFO] [stderr]     14:     0x5a2e864287c0 - core::panicking::panic_fmt::hf74784a95675d8cb
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/core/src/panicking.rs:75:14
[INFO] [stderr]     15:     0x5a2e86428b56 - core::result::unwrap_failed::h3547aee70b6258ed
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/core/src/result.rs:1704:5
[INFO] [stderr]     16:     0x5a2e863ecaca - build_script_build::main::hb419da2179687de6
[INFO] [stderr]     17:     0x5a2e863ebb93 - core::ops::function::FnOnce::call_once::he743cf0ec5d0fcee
[INFO] [stderr]     18:     0x5a2e863eb706 - std::sys::backtrace::__rust_begin_short_backtrace::hcfd5d85dfe66341d
[INFO] [stderr]     19:     0x5a2e863eb649 - std::rt::lang_start::{{closure}}::h4a8be147539c3191
[INFO] [stderr]     20:     0x5a2e86407930 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h5e1dbfa84636c7eb
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     21:     0x5a2e86407930 - std::panicking::try::do_call::he42f9fd0abff1aaa
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panicking.rs:589:40
[INFO] [stderr]     22:     0x5a2e86407930 - std::panicking::try::h983aa652baec3422
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panicking.rs:552:19
[INFO] [stderr]     23:     0x5a2e86407930 - std::panic::catch_unwind::h41d30a44dd52759c
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panic.rs:359:14
[INFO] [stderr]     24:     0x5a2e86407930 - std::rt::lang_start_internal::{{closure}}::hc50345e12637b0b7
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/rt.rs:168:24
[INFO] [stderr]     25:     0x5a2e86407930 - std::panicking::try::do_call::h415e9a3ccf6bfd6e
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panicking.rs:589:40
[INFO] [stderr]     26:     0x5a2e86407930 - std::panicking::try::h35cfa36de7936f4f
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panicking.rs:552:19
[INFO] [stderr]     27:     0x5a2e86407930 - std::panic::catch_unwind::h1e123fb52e031b0e
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/panic.rs:359:14
[INFO] [stderr]     28:     0x5a2e86407930 - std::rt::lang_start_internal::h2ea4e33daf228c5a
[INFO] [stderr]                                  at /rustc/51000a35bc99aeffdc092bf2226ab562eedb9eff/library/std/src/rt.rs:164:5
[INFO] [stderr]     29:     0x5a2e863eb631 - std::rt::lang_start::ha5e376a15136b5cb
[INFO] [stderr]     30:     0x5a2e863ecf45 - main
[INFO] [stderr]     31:     0x7c09e1fc51ca - <unknown>
[INFO] [stderr]     32:     0x7c09e1fc528b - __libc_start_main
[INFO] [stderr]     33:     0x5a2e863ea9f5 - _start
[INFO] [stderr]     34:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "f776d8939cad615fac70e61a77599d3e818a0f0b409cb4e1a190e5eb59b0205a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f776d8939cad615fac70e61a77599d3e818a0f0b409cb4e1a190e5eb59b0205a", kill_on_drop: false }`
[INFO] [stdout] f776d8939cad615fac70e61a77599d3e818a0f0b409cb4e1a190e5eb59b0205a