lib/nanoc/base/services/compiler/phases/resume.rb in nanoc-4.9.6 vs lib/nanoc/base/services/compiler/phases/resume.rb in nanoc-4.9.7

@@ -3,10 +3,12 @@
 module Nanoc::Int::Compiler::Phases
   # Provides functionality for suspending and resuming item rep compilation (using fibers).
   class Resume < Abstract
     include Nanoc::Int::ContractsSupport
 
+    DONE = Object.new
+
     def initialize(wrapped:)
       super(wrapped: wrapped)
     end
 
     contract Nanoc::Int::ItemRep, C::KeywordArgs[is_outdated: C::Bool], C::Func[C::None => C::Any] => C::Any
@@ -20,12 +22,16 @@
         when Nanoc::Int::Errors::UnmetDependency
           Nanoc::Int::NotificationCenter.post(:compilation_suspended, rep, res)
           raise(res)
         when Proc
           fiber.resume(res.call)
+        when DONE # rubocop:disable Lint/EmptyWhen
+          # ignore
         else
-          # TODO: raise
+          raise Nanoc::Int::Errors::InternalInconsistency.new(
+            "Fiber yielded object of unexpected type #{res.class}",
+          )
         end
       end
 
       Nanoc::Int::NotificationCenter.post(:compilation_ended, rep)
     end
@@ -38,9 +44,10 @@
 
       @fibers[rep] ||=
         Fiber.new do
           yield
           @fibers.delete(rep)
+          DONE
         end
 
       @fibers[rep]
     end
   end