# 1.cr
puts $0
╰─ $ cr run 1.cr
Unhandled exception: Nil assertion failed (NilAssertionError)
from /home/zw963/Crystal/share/crystal/src/nil.cr:108:5 in 'not_nil!'
from /home/zw963/Crystal/share/crystal/src/crystal/once.cr:44 in '__crystal_main'
from /home/zw963/Crystal/share/crystal/src/crystal/main.cr:115:5 in 'main_user_code'
from /home/zw963/Crystal/share/crystal/src/crystal/main.cr:101:7 in 'main'
from /home/zw963/Crystal/share/crystal/src/crystal/main.cr:127:3 in 'main'
from /usr/lib/libc.so.6 in '??'
from /usr/lib/libc.so.6 in '__libc_start_main'
from ../sysdeps/x86_64/start.S:117 in '_start'
from ???
i know i made a mistake, what i want is, PROGRAM_NAME
, it same as $0
in Ruby.
But, above error really surprising, why backtrace missing the puts $0
line?