Exception backtrace is missing when code only one line of $0

[zw963]

    A little wired when code only one line.

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 ???

No any clue point out what happen.

Although, add one line before it, will point out the correct line in backtrace.

x = 100
puts $0

 ╰─ $ 130  cr 1.cr 
Unhandled exception: Nil assertion failed (NilAssertionError)
  from /home/zw963/Crystal/share/crystal/src/nil.cr:108:5 in 'not_nil!'
  from 1.cr:2:6 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 ???

Originally posted by @zw963 in #4776 (comment)

[caspiano]

@zw963 could you please detail more about your environment and build you're running?
I cannot reproduce this on darwin/musl/glibc builds of crystal 1.6.0

[zw963]

@zw963 could you please detail more about your environment and build you're running? I cannot reproduce this on darwin/musl/glibc builds of crystal 1.6.0

What is your's output?

arch linux is here.

 ╰─ $ \cat 1.cr 
puts $0
 ╰─ $ cr version
Crystal 1.6.0 [41573fadb] (2022-10-06)

LLVM: 14.0.6
Default target: x86_64-pc-linux-gnu

no args when build

 ╰─ $ crystal 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 ???

[lbguilherme]

This is odd. I also use Arch Linux and I can't reproduce.

$ echo 'puts $0' > e.cr
$ cat e.cr
puts $0
$ crystal version
Crystal 1.6.0 (2022-10-10)

LLVM: 14.0.6
Default target: x86_64-pc-linux-gnu
$ crystal run e.cr
Unhandled exception: Nil assertion failed (NilAssertionError)
  from /usr/lib/crystal/nil.cr:108:5 in 'not_nil!'
  from e.cr:1:6 in '__crystal_main'
  from /usr/lib/crystal/crystal/main.cr:115:5 in 'main_user_code'
  from /usr/lib/crystal/crystal/main.cr:101:7 in 'main'
  from /usr/lib/crystal/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 ???

Do you have some non-standard linker?

[zw963]

Wired, this issue only happen on my self-compiled crystal compiler which compiler from my laptop directly use dynamic.

if compile use --static from Alpine, it works.

Could you please try compile with following config?

pacman -S automake \
                 git \
                 libevent \
                 gmp \
                 pcre \
                 openssl \
                 libtool \
                 libxml2 \
                 libyaml \
                 gmp \
                 llvm lld \
                 wasmer wasmtime \
                 libedit

make_arg='interpreter=1 stats=1'
    make clean && make crystal $make_arg
mkdir new_cr
DESTDIR=$PWD/new_cr make install

 ╰─ $ pacman -Q |egrep 'automake|libevent|gmp|pcre|openssl|libtool|libyaml|gmp|llvm|lld|wasm|libedit'
automake 1.16.5-1
gmp 6.2.1-2
lib32-gmp 6.2.1-1
lib32-llvm-libs 14.0.6-2
lib32-openssl 1:1.1.1.q-1
lib32-pcre2 10.40-3
libedit 20210910_3.1-1
libevent 2.1.12-2
libtool 2.4.7-5
libyaml 0.2.5-1
lld 14.0.6-1
llvm 14.0.6-3
llvm-libs 14.0.6-3
openssl 1.1.1.q-1
openssl-1.0 1.0.2.u-1
pcre 8.45-3
pcre2 10.40-3
python-pyopenssl 22.1.0-1
wasmer 2.3.0-2
wasmtime 1.0.1-1