Robert Hensing d262efc240 libexpr: improve error messages for builtins.genericClosure ...

Show which element(s) are involved at each error point:

- When an element is missing the "key" attribute, show the element
- When an element is not an attribute set, show the element
- When comparing keys fails, show both elements being compared
- When calling operator fails, show which element was being processed

This provides concrete context using ValuePrinter with errorPrintOptions.

Note: errorPrintOptions uses maxDepth=10 by default, which may print
quite deeply nested structures in error messages. This could potentially
be overwhelming, but follows the existing default for error contexts.

2025-11-06 22:28:49 +01:00

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