Can't locate object method "first" via package "B::OP"

[tobyink]

I get this error when deparsing some coderefs.

If you want to see where I've encountered it, it occurs in t/20-unit/Type-Library/recursive-type-definitions.t of the Type-Tiny 1.010000 test suite. It's only being caused by a line of debugging output visible when prove --verboseis run, not an actual test, so I'll just be commenting out that line for now so the test suite can pass.