❯ ./bzl
[1] 38205 segmentation fault ./bzl
❯ lldb bzl
(lldb) target create "bzl"
Current executable set to '/Users/jschroeder/Downloads/bzl' (x86_64).
(lldb) run
Process 14378 launched: '/Users/jschroeder/Downloads/bzl' (x86_64)
Process 14378 stopped
* thread #1, stop reason = EXC_BAD_ACCESS (code=1, address=0x7ff7bff072fc)
frame #0: 0x000000000742abb1
-> 0x742abb1: cmpl $0x19, (%rsi)
0x742abb4: jne 0x742abff
0x742abb6: movq 0x20(%rsi), %r8
0x742abba: testq %r8, %r8
Target 0: (bzl) stopped.
(lldb) bt
* thread #1, stop reason = EXC_BAD_ACCESS (code=1, address=0x7ff7bff072fc)
* frame #0: 0x000000000742abb1