`iferror-nested`

Subject: IFERROR
Category: value
Formula: =IFERROR(IFERROR(1/0, 1/0), "both failed")
Canonical: both failed

Per-engine results

matches canonical diverges no fixture

Engine	Verdict	Value
gsheets	match	[object Object]
excel	match	[object Object]
lattice	match	both failed
ironcalc	match	both failed
hyperformula	match	both failed
libreoffice	diverge	—
formulas	match	both failed
pycel	diverge	#NAME?