[INFO] updating cached repository mchaver/digit-recognition [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/mchaver/digit-recognition [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/mchaver/digit-recognition" "work/ex/beta-1.38-1/sources/1.37.0/gh/mchaver/digit-recognition"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mchaver/digit-recognition'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/mchaver/digit-recognition" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mchaver/digit-recognition"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mchaver/digit-recognition'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] a605df4d31511e5bde035fff17c55835c0e19e3f [INFO] sha for GitHub repo mchaver/digit-recognition: a605df4d31511e5bde035fff17c55835c0e19e3f [INFO] validating manifest of mchaver/digit-recognition on toolchain 1.37.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of mchaver/digit-recognition on toolchain beta-2019-08-13 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing mchaver/digit-recognition [INFO] finished frobbing mchaver/digit-recognition [INFO] frobbed toml for mchaver/digit-recognition written to work/ex/beta-1.38-1/sources/1.37.0/gh/mchaver/digit-recognition/Cargo.toml [INFO] started frobbing mchaver/digit-recognition [INFO] finished frobbing mchaver/digit-recognition [INFO] frobbed toml for mchaver/digit-recognition written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mchaver/digit-recognition/Cargo.toml [INFO] crate mchaver/digit-recognition already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing mchaver/digit-recognition against beta-2019-08-13 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mchaver/digit-recognition:/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" "+beta-2019-08-13" "build" "--frozen"` [INFO] [stdout] c72a4edb0eecec224c9fd81b59cd75990200c88d41039c3a67a020c9b0f2cfcc [INFO] running `"docker" "start" "-a" "c72a4edb0eecec224c9fd81b59cd75990200c88d41039c3a67a020c9b0f2cfcc"` [INFO] [stderr] Compiling pear v0.0.17 [INFO] [stderr] Compiling log v0.4.2 [INFO] [stderr] Compiling isatty v0.1.8 [INFO] [stderr] Compiling pear_codegen v0.0.17 [INFO] [stderr] Compiling rocket v0.3.12 [INFO] [stderr] Compiling rocket_codegen v0.3.12 [INFO] [stderr] Compiling toml v0.4.6 [INFO] [stderr] Compiling rayon-core v1.4.0 [INFO] [stderr] error: failed to run custom build command for `pear_codegen v0.0.17` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/crater/target/debug/build/pear_codegen-ea2af7ab133070df/build-script-build` (exit code: 101) [INFO] [stderr] --- stderr [INFO] [stderr] Error: Pear requires a nightly or dev version of Rust. [INFO] [stderr] Installed version is: 1.38.0-beta.1 (2019-08-13). Minimum required: 1.27.0-nightly (2018-04-14). [INFO] [stderr] thread 'main' panicked at 'Aborting compilation due to incompatible compiler.', /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.17/build.rs:31:13 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x56552581c72b - backtrace::backtrace::libunwind::trace::h23ae608c8b906c69 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x56552581c72b - backtrace::backtrace::trace_unsynchronized::h65b3ea295a85fd48 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x56552581c72b - std::sys_common::backtrace::_print::h24f527b44b6cfc06 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x56552581c72b - std::sys_common::backtrace::print::h712608e4347fd64a [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x56552581c72b - std::panicking::default_hook::{{closure}}::h6c3d570c2b500048 [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 5: 0x56552581c406 - std::panicking::default_hook::hb29963fb4747e0dd [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x56552581cded - std::panicking::rust_panic_with_hook::hd1236c3083de823a [INFO] [stderr] at src/libstd/panicking.rs:477 [INFO] [stderr] 7: 0x5655257f1c21 - std::panicking::begin_panic::hf4678c3a78f0320f [INFO] [stderr] at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/panicking.rs:411 [INFO] [stderr] 8: 0x5655257efa5a - build_script_build::main::hbb327357feaac074 [INFO] [stderr] at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.17/build.rs:31 [INFO] [stderr] 9: 0x5655257f1160 - std::rt::lang_start::{{closure}}::habe5e435f85f209a [INFO] [stderr] at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/rt.rs:64 [INFO] [stderr] 10: 0x56552581c843 - std::rt::lang_start_internal::{{closure}}::hf367a5a6ae52b0ce [INFO] [stderr] at src/libstd/rt.rs:49 [INFO] [stderr] 11: 0x56552581c843 - std::panicking::try::do_call::h9d779bc5e27e3284 [INFO] [stderr] at src/libstd/panicking.rs:296 [INFO] [stderr] 12: 0x565525822d0a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:80 [INFO] [stderr] 13: 0x56552581d2fd - std::panicking::try::h4af22d9cb0afa351 [INFO] [stderr] at src/libstd/panicking.rs:275 [INFO] [stderr] 14: 0x56552581d2fd - std::panic::catch_unwind::hbb68a9ada87bfb97 [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 15: 0x56552581d2fd - std::rt::lang_start_internal::hba9e09d74440ce4d [INFO] [stderr] at src/libstd/rt.rs:48 [INFO] [stderr] 16: 0x5655257f1139 - std::rt::lang_start::ha174684dc4cf9257 [INFO] [stderr] at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/rt.rs:64 [INFO] [stderr] 17: 0x5655257f083a - main [INFO] [stderr] 18: 0x7f7bcaac02e1 - __libc_start_main [INFO] [stderr] 19: 0x5655257ef38a - _start [INFO] [stderr] 20: 0x0 - [INFO] [stderr] [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "c72a4edb0eecec224c9fd81b59cd75990200c88d41039c3a67a020c9b0f2cfcc"` [INFO] running `"docker" "rm" "-f" "c72a4edb0eecec224c9fd81b59cd75990200c88d41039c3a67a020c9b0f2cfcc"` [INFO] [stdout] c72a4edb0eecec224c9fd81b59cd75990200c88d41039c3a67a020c9b0f2cfcc