[INFO] updating cached repository TheRealGangsir/WikiBot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/TheRealGangsir/WikiBot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/TheRealGangsir/WikiBot" "work/ex/beta-1.37-6/sources/1.36.0/gh/TheRealGangsir/WikiBot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/TheRealGangsir/WikiBot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/TheRealGangsir/WikiBot" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/TheRealGangsir/WikiBot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/TheRealGangsir/WikiBot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 913c92a216a88d58d15604a5019d42b1797e8fde
[INFO] sha for GitHub repo TheRealGangsir/WikiBot: 913c92a216a88d58d15604a5019d42b1797e8fde
[INFO] validating manifest of TheRealGangsir/WikiBot 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 TheRealGangsir/WikiBot 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 TheRealGangsir/WikiBot
[INFO] finished frobbing TheRealGangsir/WikiBot
[INFO] frobbed toml for TheRealGangsir/WikiBot written to work/ex/beta-1.37-6/sources/1.36.0/gh/TheRealGangsir/WikiBot/Cargo.toml
[INFO] started frobbing TheRealGangsir/WikiBot
[INFO] finished frobbing TheRealGangsir/WikiBot
[INFO] frobbed toml for TheRealGangsir/WikiBot written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/TheRealGangsir/WikiBot/Cargo.toml
[INFO] crate TheRealGangsir/WikiBot already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing TheRealGangsir/WikiBot against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/TheRealGangsir/WikiBot:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 43fa2cf022cc0d23111fbc5d6d384053fecbe2010357575733ddb4888a14d1fe
[INFO] running `"docker" "start" "-a" "43fa2cf022cc0d23111fbc5d6d384053fecbe2010357575733ddb4888a14d1fe"`
[INFO] [stderr]    Compiling libc v0.2.32
[INFO] [stderr]    Compiling cc v1.0.1
[INFO] [stderr]    Compiling serde v1.0.15
[INFO] [stderr]    Compiling json v0.11.10
[INFO] [stderr]    Compiling encoding_rs v0.6.11
[INFO] [stderr]    Compiling derive_builder v0.5.0
[INFO] [stderr]    Compiling serde_derive_internals v0.16.0
[INFO] [stderr]    Compiling derive_builder_core v0.1.7
[INFO] [stderr]    Compiling openssl-sys v0.9.20
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling iovec v0.1.1
[INFO] [stderr]    Compiling rand v0.3.17
[INFO] [stderr]    Compiling net2 v0.2.31
[INFO] [stderr]    Compiling num_cpus v1.7.0
[INFO] [stderr]    Compiling time v0.1.38
[INFO] [stderr]    Compiling bytes v0.4.5
[INFO] [stderr]    Compiling serde_derive v1.0.15
[INFO] [stderr]    Compiling mio v0.6.10
[INFO] [stderr]    Compiling futures-cpupool v0.1.7
[INFO] [stderr]    Compiling threadpool v1.7.0
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling tempdir v0.3.5
[INFO] [stderr]    Compiling uuid v0.5.1
[INFO] [stderr]    Compiling parking_lot_core v0.2.6
[INFO] [stderr]    Compiling openssl v0.9.20
[INFO] [stderr]    Compiling hyper v0.10.13
[INFO] [stderr]    Compiling tokio-io v0.1.3
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling parking_lot v0.4.8
[INFO] [stderr]    Compiling mime_guess v1.8.2
[INFO] [stderr]    Compiling tokio-core v0.1.10
[INFO] [stderr]    Compiling chrono v0.4.0
[INFO] [stderr]    Compiling serde_urlencoded v0.5.1
[INFO] [stderr]    Compiling serde_json v1.0.4
[INFO] [stderr] error: failed to run custom build command for `mime_guess v1.8.2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/mime_guess-c5a1aa4cf122b9eb/build-script-gen_mime_types` (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" }', src/libcore/result.rs:999:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x563263132743 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h6485381528590a55
[INFO] [stderr]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stderr]    1:     0x56326312e35b - std::sys_common::backtrace::_print::h49a82ae9552e35c7
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:71
[INFO] [stderr]    2:     0x5632631315b6 - std::panicking::default_hook::{{closure}}::he20974adbefcc046
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]                                at src/libstd/panicking.rs:197
[INFO] [stderr]    3:     0x563263131349 - std::panicking::default_hook::he4af6af4ac7fef7b
[INFO] [stderr]                                at src/libstd/panicking.rs:211
[INFO] [stderr]    4:     0x563263131c0f - std::panicking::rust_panic_with_hook::h057ff03eb4c8000f
[INFO] [stderr]                                at src/libstd/panicking.rs:474
[INFO] [stderr]    5:     0x563263131791 - std::panicking::continue_panic_fmt::ha6d6ae144369025b
[INFO] [stderr]                                at src/libstd/panicking.rs:381
[INFO] [stderr]    6:     0x563263131675 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:308
[INFO] [stderr]    7:     0x5632631424ec - core::panicking::panic_fmt::hc4f83bfed80aeabd
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]    8:     0x563263123887 - core::result::unwrap_failed::hd32d062bf7fec0f8
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libcore/macros.rs:18
[INFO] [stderr]    9:     0x5632630f03ea - core::result::Result<T,E>::unwrap::h273d4a858d41231f
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libcore/result.rs:800
[INFO] [stderr]   10:     0x5632630fb5e4 - build_script_gen_mime_types::main::h4d05caf91e65533a
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/mime_guess-1.8.2/src/gen_mime_types.rs:22
[INFO] [stderr]   11:     0x56326311a52f - std::rt::lang_start::{{closure}}::h33fe3f8cff4fbd11
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/rt.rs:64
[INFO] [stderr]   12:     0x563263131662 - std::panicking::try::do_call::hc3d8373a0b215f51
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]                                at src/libstd/panicking.rs:293
[INFO] [stderr]   13:     0x563263133b99 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:85
[INFO] [stderr]   14:     0x56326313211c - std::rt::lang_start_internal::he5218c8b95d395f2
[INFO] [stderr]                                at src/libstd/panicking.rs:272
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   15:     0x56326311a508 - std::rt::lang_start::heaabdb82ebeca7c2
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/rt.rs:64
[INFO] [stderr]   16:     0x5632630fcc29 - main
[INFO] [stderr]   17:     0x7f471d4992e0 - __libc_start_main
[INFO] [stderr]   18:     0x5632630d07f9 - _start
[INFO] [stderr]   19:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "43fa2cf022cc0d23111fbc5d6d384053fecbe2010357575733ddb4888a14d1fe"`
[INFO] running `"docker" "rm" "-f" "43fa2cf022cc0d23111fbc5d6d384053fecbe2010357575733ddb4888a14d1fe"`
[INFO] [stdout] 43fa2cf022cc0d23111fbc5d6d384053fecbe2010357575733ddb4888a14d1fe