[INFO] updating cached repository xliiv/dashboard
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/xliiv/dashboard
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/xliiv/dashboard" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/xliiv/dashboard"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/xliiv/dashboard'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/xliiv/dashboard" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/xliiv/dashboard"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/xliiv/dashboard'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 53d0f6e744656f9387ddef4e54169395651f2bb1
[INFO] sha for GitHub repo xliiv/dashboard: 53d0f6e744656f9387ddef4e54169395651f2bb1
[INFO] validating manifest of xliiv/dashboard on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of xliiv/dashboard on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing xliiv/dashboard
[INFO] finished frobbing xliiv/dashboard
[INFO] frobbed toml for xliiv/dashboard written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/xliiv/dashboard/Cargo.toml
[INFO] started frobbing xliiv/dashboard
[INFO] finished frobbing xliiv/dashboard
[INFO] frobbed toml for xliiv/dashboard written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/xliiv/dashboard/Cargo.toml
[INFO] crate xliiv/dashboard already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking xliiv/dashboard against try#8ec8125bea94852768b56958f05da47666c21ab0 for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-2/try#8ec8125bea94852768b56958f05da47666c21ab0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/xliiv/dashboard:/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" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b3ba6b8bab564a53dc364462c931140ae76c7d147c9c21b632d7d2d8d9af1c89
[INFO] running `"docker" "start" "-a" "b3ba6b8bab564a53dc364462c931140ae76c7d147c9c21b632d7d2d8d9af1c89"`
[INFO] [stderr]    Compiling version_check v0.1.2
[INFO] [stderr]    Compiling libc v0.2.24
[INFO] [stderr]     Checking num-traits v0.1.39
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking dtoa v0.4.1
[INFO] [stderr]     Checking rustc-demangle v0.1.4
[INFO] [stderr]     Checking serde v1.0.8
[INFO] [stderr]     Checking itoa v0.3.1
[INFO] [stderr]     Checking cfg-if v0.1.1
[INFO] [stderr]    Compiling redis v0.8.0
[INFO] [stderr]     Checking same-file v0.1.3
[INFO] [stderr]     Checking pest v0.3.3
[INFO] [stderr]     Checking quick-error v1.2.0
[INFO] [stderr]     Checking buf_redux v0.3.0
[INFO] [stderr]     Checking sequence_trie v0.2.1
[INFO] [stderr]     Checking sha1 v0.2.0
[INFO] [stderr]     Checking route-recognizer v0.1.12
[INFO] [stderr]     Checking term v0.4.5
[INFO] [stderr]     Checking slog v2.0.6
[INFO] [stderr]     Checking unicode-segmentation v1.2.0
[INFO] [stderr]     Checking natord v1.0.9
[INFO] [stderr]     Checking unicode-bidi v0.3.3
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking base64 v0.5.2
[INFO] [stderr]     Checking error v0.1.9
[INFO] [stderr]     Checking conduit-mime-types v0.7.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.11
[INFO] [stderr]     Checking num_cpus v1.5.1
[INFO] [stderr]     Checking time v0.1.37
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking thread-id v3.1.0
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking iovec v0.1.0
[INFO] [stderr]     Checking net2 v0.2.29
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking isatty v0.1.3
[INFO] [stderr]     Checking atty v0.2.2
[INFO] [stderr]     Checking walkdir v1.0.7
[INFO] [stderr]     Checking num-integer v0.1.34
[INFO] [stderr]     Checking num-complex v0.1.38
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]     Checking slog-scope v4.0.0
[INFO] [stderr]     Checking idna v0.1.2
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking thread_local v0.3.3
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking bytes v0.4.4
[INFO] [stderr]     Checking clap v2.24.2
[INFO] [stderr]     Checking tempdir v0.3.5
[INFO] [stderr]     Checking uuid v0.2.3
[INFO] [stderr]     Checking uuid v0.5.0
[INFO] [stderr]     Checking mio v0.6.9
[INFO] [stderr]     Checking num-bigint v0.1.39
[INFO] [stderr]     Checking num-iter v0.1.33
[INFO] [stderr]     Checking plugin v0.2.6
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking url v1.5.0
[INFO] [stderr]     Checking serde_json v0.8.6
[INFO] [stderr]     Checking num-rational v0.1.38
[INFO] [stderr]    Compiling phf_shared v0.7.21
[INFO] [stderr] warning[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.5.0/src/form_urlencoded.rs:251:40
[INFO] [stderr]     |
[INFO] [stderr] 249 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 250 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 251 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stderr]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stderr]     |                                        |
[INFO] [stderr]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]     Checking num v0.1.39
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]     Checking hyper v0.10.12
[INFO] [stderr]     Checking ws v0.7.3
[INFO] [stderr]     Checking phf v0.7.21
[INFO] [stderr]     Checking chrono v0.3.1
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]     Checking serde_json v1.0.2
[INFO] [stderr]    Compiling mime_guess v1.8.1
[INFO] [stderr]     Checking slog-term v2.0.1
[INFO] [stderr]     Checking handlebars v0.27.0
[INFO] [stderr]     Checking iron v0.5.1
[INFO] [stderr]     Checking backtrace v0.3.2
[INFO] [stderr] error: failed to run custom build command for `mime_guess v1.8.1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/mime_guess-6a551d5ce988bafb/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:     0x55c3650aee2b - backtrace::backtrace::libunwind::trace::h65f453dfe0027df1
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x55c3650aee2b - backtrace::backtrace::trace_unsynchronized::hcf757005c6accfed
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x55c3650aee2b - std::sys_common::backtrace::_print::h3230a9d2592a2eba
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x55c3650aee2b - std::sys_common::backtrace::print::h19f579688627ee7e
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x55c3650aee2b - std::panicking::default_hook::{{closure}}::h472b43365b331815
[INFO] [stderr]                                at src/libstd/panicking.rs:198
[INFO] [stderr]    5:     0x55c3650aeb07 - std::panicking::default_hook::h0857821e5ff5a369
[INFO] [stderr]                                at src/libstd/panicking.rs:212
[INFO] [stderr]    6:     0x55c3650af4f0 - std::panicking::rust_panic_with_hook::ha9d31dc2aa8d852d
[INFO] [stderr]                                at src/libstd/panicking.rs:475
[INFO] [stderr]    7:     0x55c3650af072 - std::panicking::continue_panic_fmt::hf0afac1d5f249c91
[INFO] [stderr]                                at src/libstd/panicking.rs:382
[INFO] [stderr]    8:     0x55c3650aef56 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:309
[INFO] [stderr]    9:     0x55c3650c3c5d - core::panicking::panic_fmt::h0c0cb0551736f849
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]   10:     0x55c3650a1e88 - core::result::unwrap_failed::h84ee6c634a1c862a
[INFO] [stderr]                                at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/libcore/macros.rs:18
[INFO] [stderr]   11:     0x55c36507079c - core::result::Result<T,E>::unwrap::h40a3cf261d34f43f
[INFO] [stderr]                                at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/libcore/result.rs:800
[INFO] [stderr]   12:     0x55c3650796b5 - build_script_gen_mime_types::main::h7f40ddcda9b0a85e
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/mime_guess-1.8.1/src/gen_mime_types.rs:22
[INFO] [stderr]   13:     0x55c3650980b0 - std::rt::lang_start::{{closure}}::h112355bf32d73eee
[INFO] [stderr]                                at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/libstd/rt.rs:64
[INFO] [stderr]   14:     0x55c3650aef43 - std::rt::lang_start_internal::{{closure}}::h358a76ea39d8997f
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   15:     0x55c3650aef43 - std::panicking::try::do_call::h1fdcc0a978075552
[INFO] [stderr]                                at src/libstd/panicking.rs:294
[INFO] [stderr]   16:     0x55c3650b0e8a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:82
[INFO] [stderr]   17:     0x55c3650af9fd - std::panicking::try::hd48ddd0547e22f90
[INFO] [stderr]                                at src/libstd/panicking.rs:273
[INFO] [stderr]   18:     0x55c3650af9fd - std::panic::catch_unwind::heb66ca2bf3960f9b
[INFO] [stderr]                                at src/libstd/panic.rs:388
[INFO] [stderr]   19:     0x55c3650af9fd - std::rt::lang_start_internal::h7208f2146229fed7
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   20:     0x55c365098089 - std::rt::lang_start::h0cce52850fc00f93
[INFO] [stderr]                                at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/libstd/rt.rs:64
[INFO] [stderr]   21:     0x55c36507acea - main
[INFO] [stderr]   22:     0x7fd3897b22e1 - __libc_start_main
[INFO] [stderr]   23:     0x55c36504dd5a - _start
[INFO] [stderr]   24:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "b3ba6b8bab564a53dc364462c931140ae76c7d147c9c21b632d7d2d8d9af1c89"`
[INFO] running `"docker" "rm" "-f" "b3ba6b8bab564a53dc364462c931140ae76c7d147c9c21b632d7d2d8d9af1c89"`
[INFO] [stdout] b3ba6b8bab564a53dc364462c931140ae76c7d147c9c21b632d7d2d8d9af1c89