Prism accepts invalid usage of == with newline that Ruby rejects

[Earlopain]

Example code:

1 if 2 == 3 ==
4

Ruby:

test.rb:1: syntax error, unexpected == (SyntaxError)
1 if 2 == 3 ==
            ^~

Prism:

#<Prism::LexResult:0x00007ba5316a4f80
 @comments=[],
 @data_loc=nil,
 @errors=[],
 @magic_comments=[],
 @source=#<Prism::ASCIISource:0x00007ba531554e78 @offsets=[0, 15, 17], @source="1 if 2 == 3 ==\n4\n", @start_line=1>,
 @value=
  [[INTEGER(1,0)-(1,1)("1"), 2],
   [KEYWORD_IF_MODIFIER(1,2)-(1,4)("if"), 1025],
   [INTEGER(1,5)-(1,6)("2"), 2],
   [EQUAL_EQUAL(1,7)-(1,9)("=="), 1],
   [INTEGER(1,10)-(1,11)("3"), 2],
   [EQUAL_EQUAL(1,12)-(1,14)("=="), 1],
   [IGNORED_NEWLINE(1,14)-(2,0)("\n"), 1],
   [INTEGER(2,0)-(2,1)("4"), 2],
   [NEWLINE(2,1)-(3,0)("\n"), 1],
   [EOF(3,0)-(3,0)(""), 1]],
 @warnings=
  [#<Prism::ParseWarning @type=:void_statement @message="possibly useless use of == in void context" @location=#<Prism::Location @start_offset=0 @length=16 start_line=1> @level=:verbose>]>