executable_real? (aka access) test fails on GHA though it passes locally

[maxirmx]

# test 2  executable_real? (aka access) 
 print "executable_real?(\"/__tebako_memfs__/local/level-1/level-2/file-2.txt\") ... "
 r = File.executable_real?("/__tebako_memfs__/local/level-1/level-2/file-2.txt")
 raise "executable_real? returned '#{r}' while 'false' was expected" if r
 print "OK(failure)\n"

Also it looks like Ruby uses eaccess if it is available, but eaccess is not patched.