VSCode Debugger Breakpoints jump

[bibble235]

Hi

I am having problems setting breakpoints when using the debugger in VS Code. I can step through manually but cannot seem to set breakpoints. Before starting to debug I can add a breakpoint at 50

But when I run the code the breakpoint changes to a different line number outside of the loop line 54. Removed the target and reflashed in case the code is out of sync but do not understand. 

If I attempt to add a breakpoint in says

New install (because 24.04 came out) but it did not work on the old install either.

Thanks all - as ever

[bibble235]

I think this maybe me. Noticed 

[profile.dev]
opt-level = 3

 In my code. When at PC will check

[Tesla DeLorean]

Is this built with or without optimization?

[bibble235]

[profile.dev]
opt-level = 0

Setting to no optimization in Cargo.toml and all works.