1 files changed, 9 insertions, 0 deletions
diff --git a/tool/lib/iseq_loader_checker.rb b/tool/lib/iseq_loader_checker.rb
index 3f07b3a999..73784f8450 100644
--- a/tool/lib/iseq_loader_checker.rb
+++ b/tool/lib/iseq_loader_checker.rb
@@ -76,6 +76,15 @@ class RubyVM::InstructionSequence
     # return value
     i2_bin if CHECK_TO_BINARY
   end if CHECK_TO_A || CHECK_TO_BINARY
+
+  if opt == "prism"
+    # If RUBY_ISEQ_DUMP_DEBUG is "prism", we'll set up
+    # InstructionSequence.load_iseq to intercept loading filepaths to compile
+    # using prism.
+    def self.load_iseq(filepath)
+      RubyVM::InstructionSequence.compile_file_prism(filepath)
+    end
+  end
 end
 
 #require_relative 'x'; exit(1)