[PRISM] Fix error handling in `pm_parse_prism`

Following changes made in ruby/prism#2365 this implements error handling
for when `pm_string_mapped_init` returns `false`.

Related: ruby/prism#2207

1 files changed, 16 insertions, 0 deletions

diff --git a/test/ruby/test_compile_prism.rb b/test/ruby/test_compile_prism.rb
index e09192a4b2..c48b7ac085 100644
--- a/test/ruby/test_compile_prism.rb
+++ b/test/ruby/test_compile_prism.rb
@@ -2678,6 +2678,22 @@ end
       assert_prism_eval(":però")
     end
 
+    def test_parse_file
+      assert_nothing_raised do
+        RubyVM::InstructionSequence.compile_file_prism(__FILE__)
+      end
+
+      error = assert_raise Errno::ENOENT do
+        RubyVM::InstructionSequence.compile_file_prism("idontexist.rb")
+      end
+
+      assert_equal "No such file or directory - idontexist.rb", error.message
+
+      assert_raise TypeError do
+        RubyVM::InstructionSequence.compile_file_prism(nil)
+      end
+    end
+
     private
 
     def compare_eval(source, raw:)