Glossary of Common Compiler Errors

This mini glossary standardizes the diagnostics used in keyword sheets.

Typical messageMeaningRecommended action
unexpected tokenGrammar expected another form.Check the canonical syntax of the keyword.
type mismatchA provided type does not match the expected contract.Align input and output types before execution.
unknown symbolReference to an undeclared or out-of-scope name.Check space, use, share, and the order of declaration.
incomplete branchIncomplete coverage of a conditional flow.Add the missing case (otherwise) or simplify the logic.
unsafe context requiredA sensitive instruction is used outside an authorized area.Wrap it in unsafe and add the required guards.
invalid entrypointPoorly declared entry point.Correct the form entry ... at ....