lib/prism/ffi.rb in prism-0.21.0 vs lib/prism/ffi.rb in prism-0.22.0

@@ -158,11 +158,16 @@
       # Yields a pm_string_t pointer to the given block.
       def self.with(filepath, &block)
         pointer = FFI::MemoryPointer.new(SIZEOF)
 
         begin
-          raise unless LibRubyParser.pm_string_mapped_init(pointer, filepath)
-          yield new(pointer)
+          raise TypeError unless filepath.is_a?(String)
+
+          if LibRubyParser.pm_string_mapped_init(pointer, filepath)
+            yield new(pointer)
+          else
+            raise SystemCallError.new(filepath, FFI.errno)
+          end
         ensure
           LibRubyParser.pm_string_free(pointer)
           pointer.free
         end
       end