When Vim reports errors within a function it typically reports relative line numbers. For example:
Error detected while processing function Foo: line 11: E123: Blah blah
Here indicating the issue is at line 11 relative to start of function Foo. Guess this is a result of how Vim load functions etc. – but is there a way to make it report absolute line numbers? As in line-number of script-file holding the function.