debugger - cannot turn off optimizations

[csta]

I on a mac book air M1, with
Mojo 24.2, and lldb-1500.0.404.7,

and when I run various combinations of --no-optimization or --debug-level <doc listed value> and --debug-info-language <doc listed value>,
like,
mojo build --debug-level line-tables --no-optimization --debug-info-language Mojo mojo_test1.mojo
mojo debug mojo_test1

I get warnings that my exec was compiled with optimizations,

Current executable set to 'XXXXXXXXXX/mojotesting/mojo_test1' (arm64).
(lldb) breakpoint set --name main
Breakpoint 1: where = mojo_test1`stdlib.builtin._startup.__mojo_main_prototype(...) + 4 at _startup.mojo:132:4, address = 0x0000000100058a38
(lldb) r
Process 9355 launched: 'XXXXXXXXXX/mojotesting/mojo_test1' (arm64)
Process 9355 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
    frame #0: 0x0000000100058a38 mojo_test1`stdlib.builtin._startup.__mojo_main_prototype(...) at _startup.mojo:132:4 [opt]
warning: mojo_test1 was compiled with optimization - stepping may behave oddly; variables may not be available.

and as the warning suggests, stepping does behave oddly.

Thanks