`ds align` fails in already-aligned sections

[ISSOtm]

issotm /tmp% rgbasm a.asm
error: a.asm(5):
    Section's alignment fails required alignment (offset from section start = $0002)
error: Assembly aborted (1 error)!
1 issotm /tmp% bat a.asm
───────┬─────────────────────────────────────────────────
       │ File: a.asm
───────┼─────────────────────────────────────────────────
   1   │ SECTION "test", ROM0
   2   │
   3   │ align 4
   4   │ dw 42
   5   │ ds align[8,$C2]
───────┴─────────────────────────────────────────────────

This should have generated suitable padding, but apparently it fails to.

[Rangi42]

ds align[8,$C2] correctly puts 0 padding bytes there (since the alignment [4, 2] at that point is trivially compatible with [8, $C2]). However, when it declares that the new alignment is [8, $C2], the sanity check in sect_AlignPC is wrong somehow and complains. (Replacing ds align with manual ds N and then align 8, $C2, there's no value of N that would currently satisfy sect_AlignPC.)

[ISSOtm]

My guess is that it computes the alignment as align[8, 2], when it could decrete align[8,$C2] just fine.