running 1 test TrueClass : OK TrueClass true : ERROR: Method not found: undefined method `method_defined?` for Class TrueClass#& : OK TrueClass#^ : OK TrueClass#to_s : OK TrueClass#| : OK OK: 5, FAIL: 0, ERROR: 1, WARN: 0, SKIP: 0, STRESS: 0 thread 'spec_true' (2576) panicked at mrubyedge/tests/mruby_spec/mod.rs:78:5: true.rb: upstream assertions failed note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace test spec_true ... FAILED failures: failures: spec_true test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 49 filtered out; finished in 0.00s