[INFO] fetching crate zeebest 0.18.1...
[INFO] extracting crate zeebest 0.18.1 into work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/zeebest/0.18.1
[INFO] extracting crate zeebest 0.18.1 into work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/reg/zeebest/0.18.1
[INFO] validating manifest of zeebest-0.18.1 on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of zeebest-0.18.1 on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing zeebest-0.18.1
[INFO] finished frobbing zeebest-0.18.1
[INFO] frobbed toml for zeebest-0.18.1 written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/zeebest/0.18.1/Cargo.toml
[INFO] started frobbing zeebest-0.18.1
[INFO] finished frobbing zeebest-0.18.1
[INFO] frobbed toml for zeebest-0.18.1 written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/reg/zeebest/0.18.1/Cargo.toml
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking zeebest-0.18.1 against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-1/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/zeebest/0.18.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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=forbid" "-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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f5e3a22477d634f591d6a88c8545ce7e19195913facc1457b70b338c711841e4
[INFO] running `"docker" "start" "-a" "f5e3a22477d634f591d6a88c8545ce7e19195913facc1457b70b338c711841e4"`
[INFO] [stderr]    Compiling protobuf v2.7.0
[INFO] [stderr]     Checking atomic-counter v1.0.1
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling protoc v2.7.0
[INFO] [stderr]     Checking tls-api v0.1.22
[INFO] [stderr]     Checking tokio-threadpool v0.1.15
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]     Checking tls-api-stub v0.1.22
[INFO] [stderr]     Checking tokio-tls-api v0.1.22
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]     Checking tokio-uds v0.1.7
[INFO] [stderr]     Checking httpbis v0.7.0
[INFO] [stderr]    Compiling protobuf-codegen v2.7.0
[INFO] [stderr]     Checking grpc v0.6.1
[INFO] [stderr]    Compiling grpc-compiler v0.6.1
[INFO] [stderr]    Compiling protoc-rust v2.7.0
[INFO] [stderr]    Compiling protoc-rust-grpc v0.6.1
[INFO] [stderr]    Compiling zeebest v0.18.1 (/opt/crater/workdir)
[INFO] [stderr] error: failed to run custom build command for `zeebest v0.18.1 (/opt/crater/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/zeebest-74f17da50e99435e/build-script-build` (exit code: 101)
[INFO] [stderr] --- stdout
[INFO] [stderr] cargo:rerun-if-changed=proto/gateway.proto
[INFO] [stderr] 
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at 'protoc-rust-grpc: Os { code: 30, kind: Other, message: "Read-only file system" }', src/libcore/result.rs:999:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x5568b3da1deb - backtrace::backtrace::libunwind::trace::h3eb7dec79b0cb248
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x5568b3da1deb - backtrace::backtrace::trace_unsynchronized::h828522acfd8fecfd
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x5568b3da1deb - std::sys_common::backtrace::_print::ha50329dede3e270e
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x5568b3da1deb - std::sys_common::backtrace::print::ha6d7f96740481555
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x5568b3da1deb - std::panicking::default_hook::{{closure}}::h48c4812e51e499b0
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x5568b3da1ac7 - std::panicking::default_hook::h5d25d0fa83093442
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x5568b3da24b0 - std::panicking::rust_panic_with_hook::h1babb2b4ac73106c
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x5568b3da2032 - std::panicking::continue_panic_fmt::hb318720956a96dd4
[INFO] [stderr]                                at src/libstd/panicking.rs:384
[INFO] [stderr]    8:     0x5568b3da1f16 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:311
[INFO] [stderr]    9:     0x5568b3dc099d - core::panicking::panic_fmt::h78250769f89ff6a0
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]   10:     0x5568b3d80d48 - core::result::unwrap_failed::hfd73b88f19734410
[INFO] [stderr]                                at /rustc/848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/src/libcore/macros.rs:18
[INFO] [stderr]   11:     0x5568b3a59737 - core::result::Result<T,E>::expect::h56f241ee201dc122
[INFO] [stderr]                                at /rustc/848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/src/libcore/result.rs:827
[INFO] [stderr]   12:     0x5568b3a599f1 - build_script_build::main::h7eb1d998e5a3e114
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:4
[INFO] [stderr]   13:     0x5568b3a598b0 - std::rt::lang_start::{{closure}}::h97612769f77286c2
[INFO] [stderr]                                at /rustc/848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/src/libstd/rt.rs:64
[INFO] [stderr]   14:     0x5568b3da1f03 - std::rt::lang_start_internal::{{closure}}::h8302806cea4153ed
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   15:     0x5568b3da1f03 - std::panicking::try::do_call::hc811096721c4b953
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   16:     0x5568b3da928a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:82
[INFO] [stderr]   17:     0x5568b3da29bd - std::panicking::try::h132c927956f6dad4
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   18:     0x5568b3da29bd - std::panic::catch_unwind::h2f6ea137782ab73f
[INFO] [stderr]                                at src/libstd/panic.rs:388
[INFO] [stderr]   19:     0x5568b3da29bd - std::rt::lang_start_internal::h0f27bcf63030d183
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   20:     0x5568b3a59889 - std::rt::lang_start::h63a4d11ca64679cc
[INFO] [stderr]                                at /rustc/848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/src/libstd/rt.rs:64
[INFO] [stderr]   21:     0x5568b3a59a2a - main
[INFO] [stderr]   22:     0x7f6026cb42e1 - __libc_start_main
[INFO] [stderr]   23:     0x5568b3a5957a - _start
[INFO] [stderr]   24:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "f5e3a22477d634f591d6a88c8545ce7e19195913facc1457b70b338c711841e4"`
[INFO] running `"docker" "rm" "-f" "f5e3a22477d634f591d6a88c8545ce7e19195913facc1457b70b338c711841e4"`
[INFO] [stdout] f5e3a22477d634f591d6a88c8545ce7e19195913facc1457b70b338c711841e4