[INFO] crate flutter-engine-sys 0.3.2 is already in cache
[INFO] extracting crate flutter-engine-sys 0.3.2 into work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/flutter-engine-sys/0.3.2
[INFO] extracting crate flutter-engine-sys 0.3.2 into work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/flutter-engine-sys/0.3.2
[INFO] validating manifest of flutter-engine-sys-0.3.2 on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of flutter-engine-sys-0.3.2 on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing flutter-engine-sys-0.3.2
[INFO] finished frobbing flutter-engine-sys-0.3.2
[INFO] frobbed toml for flutter-engine-sys-0.3.2 written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/flutter-engine-sys/0.3.2/Cargo.toml
[INFO] started frobbing flutter-engine-sys-0.3.2
[INFO] finished frobbing flutter-engine-sys-0.3.2
[INFO] frobbed toml for flutter-engine-sys-0.3.2 written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/flutter-engine-sys/0.3.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking flutter-engine-sys-0.3.2 against master#435236b8877cdb98c82eaebfb7887782277265c5 for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-7/master#435236b8877cdb98c82eaebfb7887782277265c5:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/flutter-engine-sys/0.3.2:/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" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] de92c94cf106cbd7ef0e36ad6875f8e622fdd289ed92b828e15b8f48b463502f
[INFO] running `"docker" "start" "-a" "de92c94cf106cbd7ef0e36ad6875f8e622fdd289ed92b828e15b8f48b463502f"`
[INFO] [stderr]    Compiling adler32 v1.0.3
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling curl v0.4.22
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling transformation-pipeline v0.1.0
[INFO] [stderr]    Compiling bindgen v0.42.3
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.1
[INFO] [stderr]    Compiling curl-sys v0.4.20
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling miniz_oxide v0.3.1
[INFO] [stderr]    Compiling bzip2-sys v0.1.7
[INFO] [stderr]    Compiling socket2 v0.3.11
[INFO] [stderr]    Compiling which v1.0.5
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling openssl-sys v0.9.48
[INFO] [stderr]    Compiling msdos_time v0.1.6
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.2.3
[INFO] [stderr]    Compiling flate2 v1.0.9
[INFO] [stderr]    Compiling zip v0.2.8
[INFO] [stderr]    Compiling unzip v0.1.0
[INFO] [stderr]    Compiling flutter-download v0.3.0
[INFO] [stderr]    Compiling flutter-engine-sys v0.3.2 (/opt/crater/workdir)
[INFO] [stderr] error: failed to run custom build command for `flutter-engine-sys v0.3.2 (/opt/crater/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/flutter-engine-sys-727f649cdb026d85/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] error: 'rustfmt' is not installed for the toolchain '435236b8877cdb98c82eaebfb7887782277265c5-alt'
[INFO] [stderr] To install, run `rustup component add rustfmt --toolchain 435236b8877cdb98c82eaebfb7887782277265c5-alt`
[INFO] [stderr] Custom { kind: Other, error: "Internal rustfmt error" }
[INFO] [stderr] thread 'main' panicked at 'Cannot get flutter engine version: InvalidFlutterRoot("output empty")', src/libcore/result.rs:1084:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x562e20d9b85b - backtrace::backtrace::libunwind::trace::h88d9499c2d7e1dbc
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x562e20d9b85b - backtrace::backtrace::trace_unsynchronized::h64df3798ffaf338f
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x562e20d9b85b - std::sys_common::backtrace::_print::h549f3692f8d3f393
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x562e20d9b85b - std::sys_common::backtrace::print::h037f1d7e6e0e94de
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x562e20d9b85b - std::panicking::default_hook::{{closure}}::h88a39cbd1a8489c9
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x562e20d9b536 - std::panicking::default_hook::hdb7c9c6632585072
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x562e20d9bfcd - std::panicking::rust_panic_with_hook::h906f2b0ace338868
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x562e20d9bb52 - std::panicking::continue_panic_fmt::h3597c4d7a66a7e7b
[INFO] [stderr]                                at src/libstd/panicking.rs:384
[INFO] [stderr]    8:     0x562e20d9ba36 - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:311
[INFO] [stderr]    9:     0x562e20dbc4cd - core::panicking::panic_fmt::he1729b262db7d0f1
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]   10:     0x562e20dbc5c7 - core::result::unwrap_failed::h24d6964fca127bdf
[INFO] [stderr]                                at src/libcore/result.rs:1084
[INFO] [stderr]   11:     0x562e205b65c2 - core::result::Result<T,E>::expect::hfe448e09ad9ce199
[INFO] [stderr]                                at /rustc/435236b8877cdb98c82eaebfb7887782277265c5/src/libcore/result.rs:879
[INFO] [stderr]   12:     0x562e205b2abb - build_script_build::main::h85ba96bb6ea3d5b5
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:48
[INFO] [stderr]   13:     0x562e205aed10 - std::rt::lang_start::{{closure}}::h1f0222853f8819bf
[INFO] [stderr]                                at /rustc/435236b8877cdb98c82eaebfb7887782277265c5/src/libstd/rt.rs:64
[INFO] [stderr]   14:     0x562e20d9b9d3 - std::rt::lang_start_internal::{{closure}}::h9ea1b9f2bce8ffef
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   15:     0x562e20d9b9d3 - std::panicking::try::do_call::hfbd18154d6e81e0d
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   16:     0x562e20da482a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   17:     0x562e20d9c59d - std::panicking::try::h9cb4b237371abf81
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   18:     0x562e20d9c59d - std::panic::catch_unwind::hd403853a39b4e3c9
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   19:     0x562e20d9c59d - std::rt::lang_start_internal::h7e5e162b169a1510
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   20:     0x562e205aece9 - std::rt::lang_start::ha9ba6ec2171ee0cc
[INFO] [stderr]                                at /rustc/435236b8877cdb98c82eaebfb7887782277265c5/src/libstd/rt.rs:64
[INFO] [stderr]   21:     0x562e205b3aaa - main
[INFO] [stderr]   22:     0x7f43be2ef2e1 - __libc_start_main
[INFO] [stderr]   23:     0x562e205ab66a - _start
[INFO] [stderr]   24:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "de92c94cf106cbd7ef0e36ad6875f8e622fdd289ed92b828e15b8f48b463502f"`
[INFO] running `"docker" "rm" "-f" "de92c94cf106cbd7ef0e36ad6875f8e622fdd289ed92b828e15b8f48b463502f"`
[INFO] [stdout] de92c94cf106cbd7ef0e36ad6875f8e622fdd289ed92b828e15b8f48b463502f