running 1 test
Proc : OK
Proc.new : 
thread 'spec_proc' (2540) panicked at mrubyedge/src/yamrb/prelude/proc.rs:21:17:
index out of bounds: the len is 0 but the index is 0
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
test spec_proc ... FAILED

failures:

failures:
    spec_proc

test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 49 filtered out; finished in 0.00s