single line block formatting causes syntax error

[kt97679]

$ cat test.rb 
a = [11, 22].map do |x|
    x.to_s
end
puts(a.join)
$ ./tinyrb test.rb                                                                                                                                                                                                                                   
1122
$ cat test.rb 
a = [11, 22].map do |x| x.to_s; end
puts(a.join)
$ ./tinyrb test.rb 
SyntaxError: SyntaxError in test.rb at line 1 near token 'x' before text "a = [11, 22].map do |x| x"
$