Nov 27 20:07:36.775 INFO documenting jeremyBanks/tprime against try#f5a0bd723553ea4b7556bd7087b9f0919cafb483 for pr-55318
Nov 27 20:07:36.777 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55318/worker-4/try#f5a0bd723553ea4b7556bd7087b9f0919cafb483:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55318/try#f5a0bd723553ea4b7556bd7087b9f0919cafb483:/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 +f5a0bd723553ea4b7556bd7087b9f0919cafb483-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 20:07:37.297 INFO [stdout] 1df9b4eb4580c23ec0dfd1c23c3fb66c9ed61f02781eb20cb9daba8bd1986e99
Nov 27 20:07:37.300 INFO running `"docker" "start" "-a" "1df9b4eb4580c23ec0dfd1c23c3fb66c9ed61f02781eb20cb9daba8bd1986e99"`
Nov 27 20:07:39.057 INFO [stderr] usermod: no changes
Nov 27 20:07:39.206 INFO [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
Nov 27 20:07:39.291 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.15
Nov 27 20:07:39.292 INFO [stderr]     Checking web-sys v0.0.1
Nov 27 20:07:39.292 INFO [stderr]    Compiling proc-macro2 v0.4.9
Nov 27 20:07:39.292 INFO [stderr]     Checking rand v0.5.5
Nov 27 20:07:39.293 INFO [stderr]    Compiling serde_json v1.0.24
Nov 27 20:07:39.293 INFO [stderr]    Compiling serdebug v1.0.5
Nov 27 20:07:44.595 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Nov 27 20:07:44.595 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.9/src/unstable.rs:347:27
Nov 27 20:07:44.595 INFO [stderr]     |
Nov 27 20:07:44.595 INFO [stderr] 347 |             Span::Nightly(proc_macro::Span::def_site())
Nov 27 20:07:44.595 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 20:07:44.596 INFO [stderr]     |
Nov 27 20:07:44.596 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Nov 27 20:07:44.596 INFO [stderr] 
Nov 27 20:07:44.643 INFO [stderr] error: aborting due to previous error
Nov 27 20:07:44.644 INFO [stderr] 
Nov 27 20:07:44.644 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Nov 27 20:07:44.680 INFO [stderr] error: Could not compile `proc-macro2`.
Nov 27 20:07:44.680 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Nov 27 20:07:46.027 INFO [stderr] error: build failed
Nov 27 20:07:46.030 INFO [stderr] su: No module specific data is present
Nov 27 20:07:46.925 INFO running `"docker" "inspect" "1df9b4eb4580c23ec0dfd1c23c3fb66c9ed61f02781eb20cb9daba8bd1986e99"`
Nov 27 20:07:47.274 INFO running `"docker" "rm" "-f" "1df9b4eb4580c23ec0dfd1c23c3fb66c9ed61f02781eb20cb9daba8bd1986e99"`
Nov 27 20:07:47.539 INFO [stdout] 1df9b4eb4580c23ec0dfd1c23c3fb66c9ed61f02781eb20cb9daba8bd1986e99