Dec 13 21:29:40.602 INFO testing dflemstr/semantic-editor against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 13 21:29:40.602 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 13 21:29:41.029 INFO [stdout] 19ffd31b07e6ad2c1ae06e4e5d7289632d6857321acf40b4dcd1401721d09e7d
Dec 13 21:29:41.038 INFO running `"docker" "start" "-a" "19ffd31b07e6ad2c1ae06e4e5d7289632d6857321acf40b4dcd1401721d09e7d"`
Dec 13 21:29:42.135 INFO [stderr] usermod: no changes
Dec 13 21:29:42.471 INFO [stderr]    Compiling proc-macro2 v0.4.13
Dec 13 21:29:42.479 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.19
Dec 13 21:29:42.547 INFO [stderr]    Compiling multimap v0.4.0
Dec 13 21:29:42.547 INFO [stderr]    Compiling slog v2.3.2
Dec 13 21:29:42.547 INFO [stderr]    Compiling type-info v0.2.1
Dec 13 21:29:42.547 INFO [stderr]    Compiling futures-await-await-macro v0.1.1
Dec 13 21:29:42.547 INFO [stderr]    Compiling petgraph v0.4.12
Dec 13 21:29:42.547 INFO [stderr]    Compiling walkdir v2.2.5
Dec 13 21:29:44.251 INFO [stderr]    Compiling tempdir v0.3.7
Dec 13 21:29:44.655 INFO [stderr]    Compiling env_logger v0.5.12
Dec 13 21:29:44.693 INFO [stderr]    Compiling prost v0.4.0
Dec 13 21:29:45.579 INFO [stderr]    Compiling http v0.1.9
Dec 13 21:29:45.643 INFO [stderr]    Compiling getset v0.0.6
Dec 13 21:29:45.683 INFO [stderr]    Compiling semantic v0.1.0 (/source/semantic)
Dec 13 21:29:48.005 INFO [stderr]    Compiling type-info-derive v0.2.0
Dec 13 21:29:49.929 INFO [stderr]    Compiling tokio-reactor v0.1.3
Dec 13 21:29:51.043 INFO [stderr]    Compiling slog-scope v4.0.1
Dec 13 21:29:51.051 INFO [stderr]    Compiling slog-async v2.3.0
Dec 13 21:29:52.083 INFO [stderr]    Compiling slog-json v2.2.0
Dec 13 21:29:55.103 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 13 21:29:55.103 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.13/src/unstable.rs:359:27
Dec 13 21:29:55.103 INFO [stderr]     |
Dec 13 21:29:55.103 INFO [stderr] 359 |             Span::Nightly(proc_macro::Span::def_site())
Dec 13 21:29:55.103 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 21:29:55.103 INFO [stderr]     |
Dec 13 21:29:55.103 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 13 21:29:55.103 INFO [stderr] 
Dec 13 21:29:55.203 INFO [stderr] error: aborting due to previous error
Dec 13 21:29:55.203 INFO [stderr] 
Dec 13 21:29:55.203 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 13 21:29:55.247 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 13 21:29:55.247 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 13 21:30:02.355 INFO [stderr] error: build failed
Dec 13 21:30:02.365 INFO [stderr] su: No module specific data is present
Dec 13 21:30:03.178 INFO running `"docker" "inspect" "19ffd31b07e6ad2c1ae06e4e5d7289632d6857321acf40b4dcd1401721d09e7d"`
Dec 13 21:30:03.255 INFO running `"docker" "rm" "-f" "19ffd31b07e6ad2c1ae06e4e5d7289632d6857321acf40b4dcd1401721d09e7d"`
Dec 13 21:30:03.349 INFO [stdout] 19ffd31b07e6ad2c1ae06e4e5d7289632d6857321acf40b4dcd1401721d09e7d