Nov 16 20:11:28.540 INFO testing mattdeboard/prepend_line against try#2e026d6e5d7621634147ad4c8074f1d964dbb1be for pr-55982
Nov 16 20:11:28.540 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-5/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/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 +2e026d6e5d7621634147ad4c8074f1d964dbb1be-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 20:11:29.089 INFO [stdout] 3c5e64e5f75feed3b27d97cdc4de141b540e79a5a8278d8584507041dd065ddd
Nov 16 20:11:29.091 INFO running `"docker" "start" "-a" "3c5e64e5f75feed3b27d97cdc4de141b540e79a5a8278d8584507041dd065ddd"`
Nov 16 20:11:31.147 INFO [stderr] usermod: no changes
Nov 16 20:11:31.311 INFO [stderr]    Compiling proc-macro2 v0.4.12
Nov 16 20:11:31.311 INFO [stderr]    Compiling uuid v0.1.18
Nov 16 20:11:32.993 INFO [stderr]    Compiling mktemp v0.3.1
Nov 16 20:11:34.385 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Nov 16 20:11:34.385 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Nov 16 20:11:34.385 INFO [stderr]     |
Nov 16 20:11:34.385 INFO [stderr] 346 |             Span::Nightly(proc_macro::Span::def_site())
Nov 16 20:11:34.386 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 16 20:11:34.386 INFO [stderr]     |
Nov 16 20:11:34.386 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Nov 16 20:11:34.386 INFO [stderr] 
Nov 16 20:11:34.405 INFO [stderr] error: aborting due to previous error
Nov 16 20:11:34.405 INFO [stderr] 
Nov 16 20:11:34.406 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Nov 16 20:11:34.451 INFO [stderr] error: Could not compile `proc-macro2`.
Nov 16 20:11:34.452 INFO [stderr] 
Nov 16 20:11:34.452 INFO [stderr] To learn more, run the command again with --verbose.
Nov 16 20:11:34.453 INFO [stderr] su: No module specific data is present
Nov 16 20:11:35.831 INFO running `"docker" "inspect" "3c5e64e5f75feed3b27d97cdc4de141b540e79a5a8278d8584507041dd065ddd"`
Nov 16 20:11:36.153 INFO running `"docker" "rm" "-f" "3c5e64e5f75feed3b27d97cdc4de141b540e79a5a8278d8584507041dd065ddd"`
Nov 16 20:11:36.455 INFO [stdout] 3c5e64e5f75feed3b27d97cdc4de141b540e79a5a8278d8584507041dd065ddd