[INFO] crate okra 0.2.0 is already in cache
[INFO] extracting crate okra 0.2.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/okra/0.2.0
[INFO] extracting crate okra 0.2.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/okra/0.2.0
[INFO] validating manifest of okra-0.2.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of okra-0.2.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing okra-0.2.0
[INFO] finished frobbing okra-0.2.0
[INFO] frobbed toml for okra-0.2.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/okra/0.2.0/Cargo.toml
[INFO] started frobbing okra-0.2.0
[INFO] finished frobbing okra-0.2.0
[INFO] frobbed toml for okra-0.2.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/okra/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing okra-0.2.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/okra/0.2.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] d9b8c1fff8d33f93b305c905ecab7992a73dfaa0f6775dbc9fed039a1c0d372c
[INFO] running `"docker" "start" "-a" "d9b8c1fff8d33f93b305c905ecab7992a73dfaa0f6775dbc9fed039a1c0d372c"`
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-threadpool v0.1.15
[INFO] [stderr]    Compiling openapiv3 v0.1.4
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling hyper v0.12.33
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling handlebars v1.1.0
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling openapi-codegen v0.1.0
[INFO] [stderr]    Compiling reqwest v0.9.19
[INFO] [stderr]    Compiling okra v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] error: failed to run custom build command for `okra v0.2.0 (/opt/crater/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/okra-9f3496cf871c3d1e/build-script-build` (exit code: 101)
[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" }
[INFO] [stderr] 
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0: failure::backtrace::internal::InternalBacktrace::new::hb3c9c93f64db94a5 (0x55c184428721)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.5/src/backtrace/internal.rs:44
[INFO] [stderr]    1: failure::backtrace::Backtrace::new::h1b3687cfb8a2b144 (0x55c1844284ce)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.5/src/backtrace/mod.rs:111
[INFO] [stderr]    2: <failure::error::error_impl::ErrorImpl as core::convert::From<F>>::from::h53a534a576d00cbd (0x55c183d0c300)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.5/src/error/error_impl.rs:19
[INFO] [stderr]    3: <failure::error::Error as core::convert::From<F>>::from::hab2e29d21d39757b (0x55c183f0a7c0)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.5/src/error/mod.rs:36
[INFO] [stderr]    4: openapi_codegen::client::client::h745b3a201d17ff2f (0x55c183cda406)
[INFO] [stderr]              at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/openapi-codegen-0.1.0/src/client/mod.rs:47
[INFO] [stderr]    5: build_script_build::main::h33ab6d2819acbcad (0x55c183cb197e)
[INFO] [stderr]              at /opt/crater/workdir/build.rs:2
[INFO] [stderr]    6: std::rt::lang_start::{{closure}}::h92343075ef57b3c3 (0x55c183cb2010)
[INFO] [stderr]              at /rustc/61d1607e0f6a18bb4897d6f9b10abeac9e11eb8e/src/libstd/rt.rs:64
[INFO] [stderr]    7: std::rt::lang_start_internal::{{closure}}::h055e1fdc5578d418 (0x55c184474ee3)
[INFO] [stderr]              at src/libstd/rt.rs:49
[INFO] [stderr]       std::panicking::try::do_call::h480cafa68c9928b4
[INFO] [stderr]              at src/libstd/panicking.rs:296
[INFO] [stderr]    8: __rust_maybe_catch_panic (0x55c18447723a)
[INFO] [stderr]              at src/libpanic_unwind/lib.rs:82
[INFO] [stderr]    9: std::panicking::try::he0549d0299de204a (0x55c1844759ed)
[INFO] [stderr]              at src/libstd/panicking.rs:275
[INFO] [stderr]       std::panic::catch_unwind::h422dc2db98f03517
[INFO] [stderr]              at src/libstd/panic.rs:394
[INFO] [stderr]       std::rt::lang_start_internal::h121de03325a3f900
[INFO] [stderr]              at src/libstd/rt.rs:48
[INFO] [stderr]   10: std::rt::lang_start::h345722266eca2e7b (0x55c183cb1fe9)
[INFO] [stderr]              at /rustc/61d1607e0f6a18bb4897d6f9b10abeac9e11eb8e/src/libstd/rt.rs:64
[INFO] [stderr]   11: main (0x55c183cb19ca)
[INFO] [stderr]   12: __libc_start_main (0x7f66af8192e1)
[INFO] [stderr]   13: _start (0x55c183cb174a)
[INFO] [stderr]   14: <unknown> (0x0)', src/libcore/result.rs:999:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x55c184474dcb - backtrace::backtrace::libunwind::trace::h5dfa5d4c5feed6dc
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x55c184474dcb - backtrace::backtrace::trace_unsynchronized::hb731fe64f3fa469f
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x55c184474dcb - std::sys_common::backtrace::_print::hf4fd45fe7ae4a250
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x55c184474dcb - std::sys_common::backtrace::print::h31646c3786c57441
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x55c184474dcb - std::panicking::default_hook::{{closure}}::hda785e768c746ae7
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x55c184474aa7 - std::panicking::default_hook::h0c4b76f338614ef1
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x55c1844754e0 - std::panicking::rust_panic_with_hook::h096dff2cb12b67ce
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x55c184475062 - std::panicking::continue_panic_fmt::h0046167652be99a6
[INFO] [stderr]                                at src/libstd/panicking.rs:384
[INFO] [stderr]    8:     0x55c184474f46 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:311
[INFO] [stderr]    9:     0x55c18448f22d - core::panicking::panic_fmt::h8980489a6c4a44cb
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]   10:     0x55c183cb1b25 - core::result::unwrap_failed::h37e64678c316b88a
[INFO] [stderr]                                at /rustc/61d1607e0f6a18bb4897d6f9b10abeac9e11eb8e/src/libcore/macros.rs:18
[INFO] [stderr]   11:     0x55c183cb1beb - core::result::Result<T,E>::unwrap::heebf7bf56ad8631a
[INFO] [stderr]                                at /rustc/61d1607e0f6a18bb4897d6f9b10abeac9e11eb8e/src/libcore/result.rs:800
[INFO] [stderr]   12:     0x55c183cb1997 - build_script_build::main::h33ab6d2819acbcad
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:2
[INFO] [stderr]   13:     0x55c183cb2010 - std::rt::lang_start::{{closure}}::h92343075ef57b3c3
[INFO] [stderr]                                at /rustc/61d1607e0f6a18bb4897d6f9b10abeac9e11eb8e/src/libstd/rt.rs:64
[INFO] [stderr]   14:     0x55c184474ee3 - std::rt::lang_start_internal::{{closure}}::h055e1fdc5578d418
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   15:     0x55c184474ee3 - std::panicking::try::do_call::h480cafa68c9928b4
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   16:     0x55c18447723a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:82
[INFO] [stderr]   17:     0x55c1844759ed - std::panicking::try::he0549d0299de204a
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   18:     0x55c1844759ed - std::panic::catch_unwind::h422dc2db98f03517
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   19:     0x55c1844759ed - std::rt::lang_start_internal::h121de03325a3f900
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   20:     0x55c183cb1fe9 - std::rt::lang_start::h345722266eca2e7b
[INFO] [stderr]                                at /rustc/61d1607e0f6a18bb4897d6f9b10abeac9e11eb8e/src/libstd/rt.rs:64
[INFO] [stderr]   21:     0x55c183cb19ca - main
[INFO] [stderr]   22:     0x7f66af8192e1 - __libc_start_main
[INFO] [stderr]   23:     0x55c183cb174a - _start
[INFO] [stderr]   24:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "d9b8c1fff8d33f93b305c905ecab7992a73dfaa0f6775dbc9fed039a1c0d372c"`
[INFO] running `"docker" "rm" "-f" "d9b8c1fff8d33f93b305c905ecab7992a73dfaa0f6775dbc9fed039a1c0d372c"`
[INFO] [stdout] d9b8c1fff8d33f93b305c905ecab7992a73dfaa0f6775dbc9fed039a1c0d372c