Compiler errors
Factor handbook > The implementation > Optimizing compiler

Next:Compiler specialization hints

After loading a vocabulary, you might see a message like:
:errors - print 2 compiler errors

This indicates that some words did not pass the stack checker. Stack checker error conditions are documented in Stack checker errors, and the stack checker itself in Stack effect checking.

Words to view errors:
:errors ( -- )

:linkage ( -- )

Compiler errors are reported using the Batch error reporting mechanism, and as a result, they are also are shown in the UI error list tool.