Dec 05 20:00:47.890 INFO testing jeremyBanks/tprime against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 05 20:00:47.891 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-1/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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"`
Dec 05 20:00:48.426 INFO [stdout] 4a3e8b801c17dc6c90bfcbba506e5d8c2602922767d129895ac09cb7e684b770
Dec 05 20:00:48.428 INFO running `"docker" "start" "-a" "4a3e8b801c17dc6c90bfcbba506e5d8c2602922767d129895ac09cb7e684b770"`
Dec 05 20:00:49.784 INFO [stderr] usermod: no changes
Dec 05 20:00:49.820 INFO [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
Dec 05 20:00:49.974 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.15
Dec 05 20:00:49.977 INFO [stderr]    Compiling rand_core v0.2.1
Dec 05 20:00:49.977 INFO [stderr]    Compiling web-sys v0.0.1
Dec 05 20:00:49.977 INFO [stderr]    Compiling proc-macro2 v0.4.9
Dec 05 20:00:49.980 INFO [stderr]    Compiling serdebug v1.0.5
Dec 05 20:00:49.980 INFO [stderr]    Compiling env_logger v0.5.12
Dec 05 20:00:52.232 INFO [stderr]    Compiling rand v0.5.5
Dec 05 20:00:52.442 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 05 20:00:52.442 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.9/src/unstable.rs:347:27
Dec 05 20:00:52.442 INFO [stderr]     |
Dec 05 20:00:52.442 INFO [stderr] 347 |             Span::Nightly(proc_macro::Span::def_site())
Dec 05 20:00:52.442 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 20:00:52.442 INFO [stderr]     |
Dec 05 20:00:52.442 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 05 20:00:52.442 INFO [stderr] 
Dec 05 20:00:52.464 INFO [stderr] error: aborting due to previous error
Dec 05 20:00:52.464 INFO [stderr] 
Dec 05 20:00:52.464 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 05 20:00:52.476 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 05 20:00:52.476 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 05 20:00:56.360 INFO [stderr] error: build failed
Dec 05 20:00:56.360 INFO [stderr] su: No module specific data is present
Dec 05 20:00:57.021 INFO running `"docker" "inspect" "4a3e8b801c17dc6c90bfcbba506e5d8c2602922767d129895ac09cb7e684b770"`
Dec 05 20:00:57.314 INFO running `"docker" "rm" "-f" "4a3e8b801c17dc6c90bfcbba506e5d8c2602922767d129895ac09cb7e684b770"`
Dec 05 20:00:57.660 INFO [stdout] 4a3e8b801c17dc6c90bfcbba506e5d8c2602922767d129895ac09cb7e684b770