[INFO] updating cached repository vishusandy/blogr [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/vishusandy/blogr [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/vishusandy/blogr" "work/ex/beta-1.38-1/sources/1.37.0/gh/vishusandy/blogr"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/vishusandy/blogr'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/vishusandy/blogr" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vishusandy/blogr"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vishusandy/blogr'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 7258f90a1854f8d026bf3f964987eda127d5fab8 [INFO] sha for GitHub repo vishusandy/blogr: 7258f90a1854f8d026bf3f964987eda127d5fab8 [INFO] validating manifest of vishusandy/blogr 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 vishusandy/blogr 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 vishusandy/blogr [INFO] finished frobbing vishusandy/blogr [INFO] frobbed toml for vishusandy/blogr written to work/ex/beta-1.38-1/sources/1.37.0/gh/vishusandy/blogr/Cargo.toml [INFO] started frobbing vishusandy/blogr [INFO] finished frobbing vishusandy/blogr [INFO] frobbed toml for vishusandy/blogr written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vishusandy/blogr/Cargo.toml [INFO] crate vishusandy/blogr 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 vishusandy/blogr against 1.37.0 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/vishusandy/blogr:/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" "+1.37.0" "build" "--frozen"` [INFO] [stdout] 19de112bb28b83a4d96706a59ff14df4db3e24775a5af909d684eb9686f863dc [INFO] running `"docker" "start" "-a" "19de112bb28b83a4d96706a59ff14df4db3e24775a5af909d684eb9686f863dc"` [INFO] [stderr] Compiling unic-char-range v0.6.0 [INFO] [stderr] Compiling unic-ucd-core v0.6.0 [INFO] [stderr] Compiling md5 v0.3.7 [INFO] [stderr] Compiling pulldown-cmark v0.0.11 [INFO] [stderr] Compiling unchecked-index v0.2.2 [INFO] [stderr] Compiling alloc-no-stdlib v1.2.0 [INFO] [stderr] Compiling owning_ref v0.2.4 [INFO] [stderr] Compiling entities v1.0.1 [INFO] [stderr] Compiling unicode_categories v0.1.1 [INFO] [stderr] Compiling pipeline v0.5.0 [INFO] [stderr] Compiling adler32 v0.2.0 [INFO] [stderr] Compiling evmap v2.0.2 [INFO] [stderr] Compiling memchr v0.1.11 [INFO] [stderr] Compiling isatty v0.1.8 [INFO] [stderr] Compiling thread-id v3.3.0 [INFO] [stderr] Compiling encoding_rs v0.7.2 [INFO] [stderr] Compiling socket2 v0.3.7 [INFO] [stderr] Compiling phf_shared v0.7.21 [INFO] [stderr] Compiling brotli-decompressor v1.2.1 [INFO] [stderr] Compiling crossbeam-epoch v0.3.1 [INFO] [stderr] Compiling bytes v0.4.9 [INFO] [stderr] Compiling twoway v0.1.8 [INFO] [stderr] Compiling unic-utils v0.6.0 [INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel [INFO] [stderr] --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/twoway-0.1.8/src/lib.rs:3:31 [INFO] [stderr] | [INFO] [stderr] 3 | #![cfg_attr(feature = "pcmp", feature(asm))] [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Compiling stringprep v0.1.2 [INFO] [stderr] Compiling pear_codegen v0.0.19 [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0554`. [INFO] [stderr] error: Could not compile `twoway`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: failed to run custom build command for `pear_codegen v0.0.19` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/crater/target/debug/build/pear_codegen-620aeb3ac425209b/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: 1.37.0 (2019-08-13). Minimum required: 1.28.0-nightly (2018-06-23). [INFO] [stderr] thread 'main' panicked at 'Aborting compilation due to incompatible compiler.', /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.19/build.rs:31:13 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x55ffa9874bdb - backtrace::backtrace::libunwind::trace::hfe5db90796807973 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x55ffa9874bdb - backtrace::backtrace::trace_unsynchronized::h34b865a835594335 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x55ffa9874bdb - std::sys_common::backtrace::_print::h527254ae44989167 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x55ffa9874bdb - std::sys_common::backtrace::print::he85dd5ddddf46503 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x55ffa9874bdb - std::panicking::default_hook::{{closure}}::h847a2eb38b396f14 [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 5: 0x55ffa98748b7 - std::panicking::default_hook::h2ca0f9a30a0e206b [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x55ffa98752a0 - std::panicking::rust_panic_with_hook::hffcefc09751839d1 [INFO] [stderr] at src/libstd/panicking.rs:477 [INFO] [stderr] 7: 0x55ffa984a044 - std::panicking::begin_panic::h6aee1dea0f89778c [INFO] [stderr] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/panicking.rs:411 [INFO] [stderr] 8: 0x55ffa984814b - build_script_build::main::hf5bffcf961eac632 [INFO] [stderr] at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.19/build.rs:31 [INFO] [stderr] 9: 0x55ffa9849450 - std::rt::lang_start::{{closure}}::h40d87bbdcdb52c43 [INFO] [stderr] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/rt.rs:64 [INFO] [stderr] 10: 0x55ffa9874cf3 - std::rt::lang_start_internal::{{closure}}::h447d8812e3ee306d [INFO] [stderr] at src/libstd/rt.rs:49 [INFO] [stderr] 11: 0x55ffa9874cf3 - std::panicking::try::do_call::h4a61cb372364c745 [INFO] [stderr] at src/libstd/panicking.rs:296 [INFO] [stderr] 12: 0x55ffa987afaa - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 13: 0x55ffa98757ad - std::panicking::try::hdf71f938885bca42 [INFO] [stderr] at src/libstd/panicking.rs:275 [INFO] [stderr] 14: 0x55ffa98757ad - std::panic::catch_unwind::h7e85dbf162b1611a [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 15: 0x55ffa98757ad - std::rt::lang_start_internal::h1e06cc26b9fc25ea [INFO] [stderr] at src/libstd/rt.rs:48 [INFO] [stderr] 16: 0x55ffa9849429 - std::rt::lang_start::hcdd55ac73760ad21 [INFO] [stderr] at /rustc/eae3437dfe991621e8afdc82734f4a172d7ddf9b/src/libstd/rt.rs:64 [INFO] [stderr] 17: 0x55ffa9848f0a - main [INFO] [stderr] 18: 0x7f4e1d05c2e1 - __libc_start_main [INFO] [stderr] 19: 0x55ffa9847a8a - _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" "19de112bb28b83a4d96706a59ff14df4db3e24775a5af909d684eb9686f863dc"` [INFO] running `"docker" "rm" "-f" "19de112bb28b83a4d96706a59ff14df4db3e24775a5af909d684eb9686f863dc"` [INFO] [stdout] 19de112bb28b83a4d96706a59ff14df4db3e24775a5af909d684eb9686f863dc