LDC-E0103 — Retired Unicode-slice refusal

What it means

Not emitted on any current engine surface.

This code once refused identifiers in scripts outside the early character slice. The reader now accepts those identifiers, so no input reaches for this refusal anymore: the code survives only as a declared literal in the reader’s own tests. If you meet it in old output, read it as “this name was once outside the supported script range” and re-run the input on the current engine instead of working around it.