Dec 01 17:00:03.927 INFO documenting dflemstr/semantic-editor against master#147e60c5f89cfa2d3ffc247413956a37582c98e7 for pr-55318-1
Dec 01 17:00:03.927 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55318-1/worker-1/master#147e60c5f89cfa2d3ffc247413956a37582c98e7:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-55318-1/master#147e60c5f89cfa2d3ffc247413956a37582c98e7:/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 +147e60c5f89cfa2d3ffc247413956a37582c98e7-alt doc --frozen --no-deps --document-private-items" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 01 17:00:04.123 INFO [stdout] b7d8fbf338981187f7da6a550757893c3c2c5257362d3dd8d4f52d80dc5cd64b
Dec 01 17:00:04.126 INFO running `"docker" "start" "-a" "b7d8fbf338981187f7da6a550757893c3c2c5257362d3dd8d4f52d80dc5cd64b"`
Dec 01 17:00:04.860 INFO [stderr] usermod: no changes
Dec 01 17:00:05.301 INFO [stderr]    Compiling proc-macro2 v0.4.13
Dec 01 17:00:05.314 INFO [stderr]    Compiling byteorder v1.2.4
Dec 01 17:00:05.373 INFO [stderr]    Compiling termcolor v1.0.1
Dec 01 17:00:05.381 INFO [stderr]    Compiling multimap v0.4.0
Dec 01 17:00:05.384 INFO [stderr]    Compiling alloc-no-stdlib v1.3.0
Dec 01 17:00:05.384 INFO [stderr]    Compiling type-info v0.2.1
Dec 01 17:00:05.396 INFO [stderr]    Compiling bytesize v1.0.0
Dec 01 17:00:05.396 INFO [stderr]    Compiling pulldown-cmark v0.1.2
Dec 01 17:00:07.288 INFO [stderr]     Checking slog v2.3.2
Dec 01 17:00:07.316 INFO [stderr]     Checking futures-await-await-macro v0.1.1
Dec 01 17:00:09.166 INFO [stderr]    Compiling iovec v0.1.2
Dec 01 17:00:09.219 INFO [stderr]    Compiling petgraph v0.4.12
Dec 01 17:00:09.246 INFO [stderr]    Compiling brotli-decompressor v1.3.1
Dec 01 17:00:09.436 INFO [stderr]    Compiling semantic v0.1.0 (/source/semantic)
Dec 01 17:00:10.040 INFO [stderr]    Compiling tempdir v0.3.7
Dec 01 17:00:10.084 INFO [stderr]    Compiling env_logger v0.5.12
Dec 01 17:00:11.952 INFO [stderr]    Compiling syn v0.13.11
Dec 01 17:00:11.988 INFO [stderr]    Compiling backtrace-sys v0.1.23
Dec 01 17:00:13.028 INFO [stderr]    Compiling serde_json v1.0.24
Dec 01 17:00:15.380 INFO [stderr]     Checking http v0.1.9
Dec 01 17:00:15.508 INFO [stderr]     Checking prost v0.4.0
Dec 01 17:00:16.234 INFO [stderr]     Checking mio-uds v0.6.6
Dec 01 17:00:18.188 INFO [stderr]     Checking slog-scope v4.0.1
Dec 01 17:00:18.228 INFO [stderr]    Compiling bytes v0.4.9
Dec 01 17:00:18.292 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 01 17:00:18.292 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.13/src/unstable.rs:359:27
Dec 01 17:00:18.292 INFO [stderr]     |
Dec 01 17:00:18.292 INFO [stderr] 359 |             Span::Nightly(proc_macro::Span::def_site())
Dec 01 17:00:18.292 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 17:00:18.292 INFO [stderr]     |
Dec 01 17:00:18.292 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 01 17:00:18.292 INFO [stderr] 
Dec 01 17:00:18.308 INFO [stderr] error: aborting due to previous error
Dec 01 17:00:18.308 INFO [stderr] 
Dec 01 17:00:18.308 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 01 17:00:18.316 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 01 17:00:18.316 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 01 17:00:27.083 INFO [stderr] error: build failed
Dec 01 17:00:27.084 INFO [stderr] su: No module specific data is present
Dec 01 17:00:27.481 INFO running `"docker" "inspect" "b7d8fbf338981187f7da6a550757893c3c2c5257362d3dd8d4f52d80dc5cd64b"`
Dec 01 17:00:27.618 INFO running `"docker" "rm" "-f" "b7d8fbf338981187f7da6a550757893c3c2c5257362d3dd8d4f52d80dc5cd64b"`
Dec 01 17:00:27.747 INFO [stdout] b7d8fbf338981187f7da6a550757893c3c2c5257362d3dd8d4f52d80dc5cd64b