If trying to use an undefined label and an undefined macro, etk panics

[jochem-brouwer]

Min example:

%macro revert_if_neq() 
        push1 revert    # [revert, a != b]
%end

%revert_if_neq()
%revert()

Note: revert is used as macro and as label but is not defined.

Panic:

thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `Some(2)`,
 right: `Some(0)`', /home/jochem/.cargo/registry/src/github.com-1ecc6299db9ec823/etk-asm-0.2.1/src/asm.rs:691:17
stack backtrace:
   0: rust_begin_unwind
             at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/std/src/panicking.rs:575:5
   1: core::panicking::panic_fmt
             at /rustc/90743e7298aca107ddaa0c202a4d3604e29bfeb6/library/core/src/panicking.rs:65:14
   2: core::panicking::assert_failed_inner
   3: core::panicking::assert_failed
   4: etk_asm::asm::Assembler::expand_macro
   5: etk_asm::asm::Assembler::push
   6: etk_asm::ingest::SourceStack<W>::write
   7: etk_asm::ingest::Ingest<W>::ingest_file
   8: eas::main