[INFO] updating cached repository danger/rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/danger/rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/danger/rust" "work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/danger/rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/danger/rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/danger/rust" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/danger/rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/danger/rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f0f9603f57edae1b0e333d15dbba053e6cfc5e7b
[INFO] sha for GitHub repo danger/rust: f0f9603f57edae1b0e333d15dbba053e6cfc5e7b
[INFO] validating manifest of danger/rust on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of danger/rust on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing danger/rust
[INFO] finished frobbing danger/rust
[INFO] frobbed toml for danger/rust written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/danger/rust/Cargo.toml
[INFO] started frobbing danger/rust
[INFO] finished frobbing danger/rust
[INFO] frobbed toml for danger/rust written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/danger/rust/Cargo.toml
[INFO] crate danger/rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking danger/rust against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-2/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/danger/rust:/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=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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7ef309f589e8cf7408fb051b6b5f23e15afbe620ecf899b4470ecda02ef57e05
[INFO] running `"docker" "start" "-a" "7ef309f589e8cf7408fb051b6b5f23e15afbe620ecf899b4470ecda02ef57e05"`
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]     Checking tokio-io v0.1.10
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.8
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling serde_json v1.0.32
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-reactor v0.1.6
[INFO] [stderr]     Checking tokio-fs v0.1.4
[INFO] [stderr]     Checking h2 v0.1.13
[INFO] [stderr]     Checking Inflector v0.6.0
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio-udp v0.1.2
[INFO] [stderr]     Checking tokio-uds v0.2.3
[INFO] [stderr]     Checking tokio v0.1.11
[INFO] [stderr]     Checking hyper v0.12.12
[INFO] [stderr]    Compiling schemafy_snapshot v0.4.1
[INFO] [stderr]    Compiling schemafy v0.4.4
[INFO] [stderr]     Checking hyper-tls v0.3.1
[INFO] [stderr]     Checking reqwest v0.9.3
[INFO] [stderr] error: failed to run custom build command for `schemafy v0.4.4`
[INFO] [stderr] process didn't exit successfully: `/opt/crater/target/debug/build/schemafy-9165215adaf2c3b5/build-script-build` (exit code: 101)
[INFO] [stderr] --- stdout
[INFO] [stderr] cargo:rerun-if-changed=src/schema.json
[INFO] [stderr] 
[INFO] [stderr] --- stderr
[INFO] [stderr] error: 'rustfmt' is not installed for the toolchain 'e305df1846a6d985315917ae0c81b74af8b4e641-alt'
[INFO] [stderr] To install, run `rustup component add rustfmt --toolchain e305df1846a6d985315917ae0c81b74af8b4e641-alt`
[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:     0x562c7b79b3b3 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h805294fd9a8a1853
[INFO] [stderr]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stderr]    1:     0x562c7b79719b - std::sys_common::backtrace::_print::h563674885828f2f5
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:71
[INFO] [stderr]    2:     0x562c7b79a246 - std::panicking::default_hook::{{closure}}::ha80a0fc374ac4513
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]                                at src/libstd/panicking.rs:197
[INFO] [stderr]    3:     0x562c7b799fd9 - std::panicking::default_hook::h22bb6d1b97092339
[INFO] [stderr]                                at src/libstd/panicking.rs:211
[INFO] [stderr]    4:     0x562c7b79a89f - std::panicking::rust_panic_with_hook::hb430545a95762309
[INFO] [stderr]                                at src/libstd/panicking.rs:474
[INFO] [stderr]    5:     0x562c7b79a421 - std::panicking::continue_panic_fmt::h5eaf2c376dcf553f
[INFO] [stderr]                                at src/libstd/panicking.rs:381
[INFO] [stderr]    6:     0x562c7b79a305 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:308
[INFO] [stderr]    7:     0x562c7b7b29ac - core::panicking::panic_fmt::ha3c82b3c8b41a4ff
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]    8:     0x562c7b6a51a2 - core::result::unwrap_failed::h628cc8d9c4f33ceb
[INFO] [stderr]                                at /rustc/e305df1846a6d985315917ae0c81b74af8b4e641/src/libcore/macros.rs:18
[INFO] [stderr]    9:     0x562c7b6a52c6 - core::result::Result<T,E>::unwrap::h4162a08e354acb3e
[INFO] [stderr]                                at /rustc/e305df1846a6d985315917ae0c81b74af8b4e641/src/libcore/result.rs:800
[INFO] [stderr]   10:     0x562c7b6a6451 - build_script_build::main::h8839521d64b6f3ae
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/schemafy-0.4.4/build.rs:22
[INFO] [stderr]   11:     0x562c7b6a6a0f - std::rt::lang_start::{{closure}}::hc6cba4ddc4e6bacf
[INFO] [stderr]                                at /rustc/e305df1846a6d985315917ae0c81b74af8b4e641/src/libstd/rt.rs:64
[INFO] [stderr]   12:     0x562c7b79a2f2 - std::panicking::try::do_call::h1f09ded7f50c84d3
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]                                at src/libstd/panicking.rs:293
[INFO] [stderr]   13:     0x562c7b7a08e9 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:85
[INFO] [stderr]   14:     0x562c7b79adac - std::rt::lang_start_internal::hf27f440d51809051
[INFO] [stderr]                                at src/libstd/panicking.rs:272
[INFO] [stderr]                                at src/libstd/panic.rs:388
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   15:     0x562c7b6a69e8 - std::rt::lang_start::haee82017f26b093d
[INFO] [stderr]                                at /rustc/e305df1846a6d985315917ae0c81b74af8b4e641/src/libstd/rt.rs:64
[INFO] [stderr]   16:     0x562c7b6a65b9 - main
[INFO] [stderr]   17:     0x7f4f7294b2e0 - __libc_start_main
[INFO] [stderr]   18:     0x562c7b6a4509 - _start
[INFO] [stderr]   19:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "7ef309f589e8cf7408fb051b6b5f23e15afbe620ecf899b4470ecda02ef57e05"`
[INFO] running `"docker" "rm" "-f" "7ef309f589e8cf7408fb051b6b5f23e15afbe620ecf899b4470ecda02ef57e05"`
[INFO] [stdout] 7ef309f589e8cf7408fb051b6b5f23e15afbe620ecf899b4470ecda02ef57e05