[INFO] updating cached repository geekapk-r/ServerR
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/geekapk-r/ServerR
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/geekapk-r/ServerR" "work/ex/beta-1.38-1/sources/1.37.0/gh/geekapk-r/ServerR"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/geekapk-r/ServerR'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/geekapk-r/ServerR" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/geekapk-r/ServerR"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/geekapk-r/ServerR'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d57636d54897a14a15b5097a22113dbd5b1ba00b
[INFO] sha for GitHub repo geekapk-r/ServerR: d57636d54897a14a15b5097a22113dbd5b1ba00b
[INFO] validating manifest of geekapk-r/ServerR 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 geekapk-r/ServerR 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 geekapk-r/ServerR
[INFO] finished frobbing geekapk-r/ServerR
[INFO] frobbed toml for geekapk-r/ServerR written to work/ex/beta-1.38-1/sources/1.37.0/gh/geekapk-r/ServerR/Cargo.toml
[INFO] started frobbing geekapk-r/ServerR
[INFO] finished frobbing geekapk-r/ServerR
[INFO] frobbed toml for geekapk-r/ServerR written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/geekapk-r/ServerR/Cargo.toml
[INFO] crate geekapk-r/ServerR 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 geekapk-r/ServerR 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-3/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/geekapk-r/ServerR:/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] d25143f2305f25d4579fd16a9c259c31f810cfcb0d0616b4464c6cc396ac39d1
[INFO] running `"docker" "start" "-a" "d25143f2305f25d4579fd16a9c259c31f810cfcb0d0616b4464c6cc396ac39d1"`
[INFO] [stderr]    Compiling serde v1.0.64
[INFO] [stderr]    Compiling pq-sys v0.4.5
[INFO] [stderr]    Compiling isatty v0.1.8
[INFO] [stderr]    Compiling proc-macro2 v0.4.4
[INFO] [stderr]    Compiling rocket v0.3.11
[INFO] [stderr]    Compiling rocket_codegen v0.3.11
[INFO] [stderr]    Compiling pear_codegen v0.0.17
[INFO] [stderr]    Compiling r2d2 v0.8.2
[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:     0x5626f858672b - 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:     0x5626f858672b - 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:     0x5626f858672b - std::sys_common::backtrace::_print::h24f527b44b6cfc06
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x5626f858672b - std::sys_common::backtrace::print::h712608e4347fd64a
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x5626f858672b - std::panicking::default_hook::{{closure}}::h6c3d570c2b500048
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x5626f8586406 - std::panicking::default_hook::hb29963fb4747e0dd
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x5626f8586ded - std::panicking::rust_panic_with_hook::hd1236c3083de823a
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x5626f855bc21 - std::panicking::begin_panic::hf4678c3a78f0320f
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/panicking.rs:411
[INFO] [stderr]    8:     0x5626f8559a5a - 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:     0x5626f855b160 - std::rt::lang_start::{{closure}}::habe5e435f85f209a
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/rt.rs:64
[INFO] [stderr]   10:     0x5626f8586843 - std::rt::lang_start_internal::{{closure}}::hf367a5a6ae52b0ce
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   11:     0x5626f8586843 - std::panicking::try::do_call::h9d779bc5e27e3284
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   12:     0x5626f858cd0a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   13:     0x5626f85872fd - std::panicking::try::h4af22d9cb0afa351
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   14:     0x5626f85872fd - std::panic::catch_unwind::hbb68a9ada87bfb97
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   15:     0x5626f85872fd - std::rt::lang_start_internal::hba9e09d74440ce4d
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   16:     0x5626f855b139 - std::rt::lang_start::ha174684dc4cf9257
[INFO] [stderr]                                at /rustc/e450539c2a8d7f791268d699cbe45ab3e57d43a1/src/libstd/rt.rs:64
[INFO] [stderr]   17:     0x5626f855a83a - main
[INFO] [stderr]   18:     0x7fa3c74992e1 - __libc_start_main
[INFO] [stderr]   19:     0x5626f855938a - _start
[INFO] [stderr]   20:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "d25143f2305f25d4579fd16a9c259c31f810cfcb0d0616b4464c6cc396ac39d1"`
[INFO] running `"docker" "rm" "-f" "d25143f2305f25d4579fd16a9c259c31f810cfcb0d0616b4464c6cc396ac39d1"`
[INFO] [stdout] d25143f2305f25d4579fd16a9c259c31f810cfcb0d0616b4464c6cc396ac39d1