Ruby

The doc says

winsize = [rows, columns] Tries to set console size. The effect depends on the platform and the running environment. You must require 'io/console' to use this method. https://docs.ruby-lang.org/en/2.4.0/IO.html#method-i-winsize-3D 

but it doesn't work.

require 'io/console' STDIN.winsize=[] #=> ArgumentError: wrong number of arguments (given 0, expected 2..4) STDIN.winsize=[24,80,1,2] #=> ok(args=4) STDIN.winsize=[24,80,nil,nil] #=> ok(args=4) STDIN.winsize=[24,80,1] #=> ok(args=3) STDIN.winsize=[24,80,nil] #=> ok(args=3) STDIN.winsize=[24,80] #=> args=2 unexpectedly throws TypeError: no implicit conversion of false into Integer 

OS: macOS Sierra 10.12.2 versions: ruby 2.4.0 -> TypeError ruby 2.3.1 -> TypeError ruby 2.0.0 -> ok 

// ext/io/console/console.c static VALUE console_set_winsize(VALUE io, VALUE size) { .... size = rb_Array(size); rb_check_arity(RARRAY_LENINT(size), 2, 4); sz = RARRAY_CONST_PTR(size); row = sz[0], col = sz[1], xpixel = sz[2], ypixel = sz[3]; ... #define SET(m) ws.ws_##m = NIL_P(m) ? 0 : (unsigned short)NUM2UINT(m)  SET(row); SET(col); SET(xpixel); SET(ypixel); // is using xpixel(==sz[2]) and ypixel(==sz[3]) ok? (RARRAY_LENINT(size) might be less than 4) // maybe sz[3] is 0(object_id of false?) when RARRAY_LENINT(size) is 2