Quoted hole value cannot be converted to syntax

Why this fires¶

A ${value} hole received a value that has no safe source representation in that quote. Primitive values and Syntax<K> nodes can be inserted directly; arbitrary records and runtime objects cannot.

Fix it¶

Extract a primitive field, or build an explicit structured template.

let label = info.name
return quote expr { ${label} }

For a source identifier, use syntax.ident(text) instead of inserting a string.