Nov 16 20:11:36.532 INFO testing mattdeboard/prepend_line against master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c for pr-55982
Nov 16 20:11:36.533 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-5/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 16 20:11:37.007 INFO [stdout] 3bd36997240a8b6b2ad4967116068ab28dc0cf7e6336135281042dd9b74ede7d
Nov 16 20:11:37.010 INFO running `"docker" "start" "-a" "3bd36997240a8b6b2ad4967116068ab28dc0cf7e6336135281042dd9b74ede7d"`
Nov 16 20:11:39.247 INFO [stderr] usermod: no changes
Nov 16 20:11:39.455 INFO [stderr]    Compiling proc-macro2 v0.4.12
Nov 16 20:11:39.455 INFO [stderr]    Compiling ryu v0.2.3
Nov 16 20:11:39.455 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.16
Nov 16 20:11:39.467 INFO [stderr]    Compiling log v0.4.3
Nov 16 20:11:39.471 INFO [stderr]    Compiling rand v0.3.22
Nov 16 20:11:40.675 INFO [stderr]    Compiling uuid v0.1.18
Nov 16 20:11:42.759 INFO [stderr]    Compiling mktemp v0.3.1
Nov 16 20:11:43.433 INFO [stderr]    Compiling serde_json v1.0.26
Nov 16 20:11:45.222 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Nov 16 20:11:45.222 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Nov 16 20:11:45.222 INFO [stderr]     |
Nov 16 20:11:45.222 INFO [stderr] 346 |             Span::Nightly(proc_macro::Span::def_site())
Nov 16 20:11:45.222 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 20:11:45.222 INFO [stderr]     |
Nov 16 20:11:45.222 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Nov 16 20:11:45.222 INFO [stderr] 
Nov 16 20:11:45.247 INFO [stderr] error: aborting due to previous error
Nov 16 20:11:45.247 INFO [stderr] 
Nov 16 20:11:45.247 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Nov 16 20:11:45.263 INFO [stderr] error: Could not compile `proc-macro2`.
Nov 16 20:11:45.264 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Nov 16 20:11:47.892 INFO [stderr] error: build failed
Nov 16 20:11:47.895 INFO [stderr] su: No module specific data is present
Nov 16 20:11:48.385 INFO running `"docker" "inspect" "3bd36997240a8b6b2ad4967116068ab28dc0cf7e6336135281042dd9b74ede7d"`
Nov 16 20:11:48.689 INFO running `"docker" "rm" "-f" "3bd36997240a8b6b2ad4967116068ab28dc0cf7e6336135281042dd9b74ede7d"`
Nov 16 20:11:48.991 INFO [stdout] 3bd36997240a8b6b2ad4967116068ab28dc0cf7e6336135281042dd9b74ede7d