i take it back, it's only one line of the defmt linker script it doesn't like.

```
/* `1` specifies the start address of this virtual (`(INFO)`) section */
  /* Tag number 0 is reserved for special uses, like as a format sequence terminator. */
  .defmt 1 (INFO) :
  {
    /* For some reason the `1` above has no effect, but this does */
    . = 1; 
```

the `. = 1;` line yields: Error: dot expression evaluation in .defmt with permissions NONE is not supported */
removing that and it no longer complains, but the assertion `ASSERT(__DEFMT_MARKER_END < 65534, ".defmt section cannot contain more than 65534 interned strings");` fails.
which makes sense, because the linker is no longer putting the DEFMT markers where they belong.

i am super glad we've got all of these linker asserts, trying to verify this stuff by eye is tedious.