Nov 27 23:12:26.755 INFO documenting dflemstr/semantic-editor against master#6bfb46e4ac9a2704f06de1a2ff7a4612cd70c8cb for pr-55318
Nov 27 23:12:26.756 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55318/worker-7/master#6bfb46e4ac9a2704f06de1a2ff7a4612cd70c8cb:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-55318/master#6bfb46e4ac9a2704f06de1a2ff7a4612cd70c8cb:/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 +6bfb46e4ac9a2704f06de1a2ff7a4612cd70c8cb-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"`
Nov 27 23:12:26.974 INFO [stdout] 6841fc7ae6a5a0387251f2e239d6073b06574ccece80e904e5e58691fea5092c
Nov 27 23:12:27.026 INFO running `"docker" "start" "-a" "6841fc7ae6a5a0387251f2e239d6073b06574ccece80e904e5e58691fea5092c"`
Nov 27 23:12:27.697 INFO [stderr] usermod: no changes
Nov 27 23:12:28.171 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.19
Nov 27 23:12:28.171 INFO [stderr]    Compiling byteorder v1.2.4
Nov 27 23:12:28.172 INFO [stderr]    Compiling itoa v0.4.2
Nov 27 23:12:28.175 INFO [stderr]    Compiling termcolor v1.0.1
Nov 27 23:12:28.175 INFO [stderr]    Compiling alloc-no-stdlib v1.3.0
Nov 27 23:12:28.175 INFO [stderr]    Compiling bytesize v1.0.0
Nov 27 23:12:28.175 INFO [stderr]    Compiling type-info v0.2.1
Nov 27 23:12:28.175 INFO [stderr]     Checking slog v2.3.2
Nov 27 23:12:30.027 INFO [stderr]    Compiling iovec v0.1.2
Nov 27 23:12:30.033 INFO [stderr]     Checking uuid v0.6.5
Nov 27 23:12:31.167 INFO [stderr]     Checking net2 v0.2.33
Nov 27 23:12:31.251 INFO [stderr]    Compiling walkdir v2.2.5
Nov 27 23:12:32.365 INFO [stderr]    Compiling brotli-decompressor v1.3.1
Nov 27 23:12:32.416 INFO [stderr]    Compiling proc-macro2 v0.4.13
Nov 27 23:12:33.520 INFO [stderr]    Compiling tempdir v0.3.7
Nov 27 23:12:33.520 INFO [stderr]    Compiling serde v1.0.71
Nov 27 23:12:34.914 INFO [stderr]    Compiling num-traits v0.2.5
Nov 27 23:12:34.927 INFO [stderr]     Checking slog-scope v4.0.1
Nov 27 23:12:35.035 INFO [stderr]    Compiling semantic v0.1.0 (/source/semantic)
Nov 27 23:12:35.035 INFO [stderr]    Compiling bytes v0.4.9
Nov 27 23:12:35.879 INFO [stderr]    Compiling backtrace-sys v0.1.23
Nov 27 23:12:37.591 INFO [stderr]    Compiling env_logger v0.5.12
Nov 27 23:12:37.899 INFO [stderr]     Checking mio v0.6.15
Nov 27 23:12:38.683 INFO [stderr]     Checking tokio-io v0.1.7
Nov 27 23:12:40.107 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Nov 27 23:12:40.107 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.13/src/unstable.rs:359:27
Nov 27 23:12:40.107 INFO [stderr]     |
Nov 27 23:12:40.107 INFO [stderr] 359 |             Span::Nightly(proc_macro::Span::def_site())
Nov 27 23:12:40.107 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 23:12:40.107 INFO [stderr]     |
Nov 27 23:12:40.107 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Nov 27 23:12:40.107 INFO [stderr] 
Nov 27 23:12:40.192 INFO [stderr] error: aborting due to previous error
Nov 27 23:12:40.199 INFO [stderr] 
Nov 27 23:12:40.199 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Nov 27 23:12:40.235 INFO [stderr] error: Could not compile `proc-macro2`.
Nov 27 23:12:40.235 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Nov 27 23:12:50.215 INFO [stderr] error: build failed
Nov 27 23:12:50.223 INFO [stderr] su: No module specific data is present
Nov 27 23:12:50.563 INFO running `"docker" "inspect" "6841fc7ae6a5a0387251f2e239d6073b06574ccece80e904e5e58691fea5092c"`
Nov 27 23:12:50.704 INFO running `"docker" "rm" "-f" "6841fc7ae6a5a0387251f2e239d6073b06574ccece80e904e5e58691fea5092c"`
Nov 27 23:12:50.859 INFO [stdout] 6841fc7ae6a5a0387251f2e239d6073b06574ccece80e904e5e58691fea5092c