Fixes#7830
When a failing test expression selected a value out of a local variable
via a ground ref (e.g. tc.data), the pretty --var-values output only
showed the base variable's full value rather than the selected value
being compared. Resolution previously only worked for refs the compiler
rewrites into locals (calls, arithmetic, variable-keyed refs); plain
ground object selections stay inline and were never resolved.
Handle ast.Ref terms in PrettyEvent's var walker: resolve a ground ref
whose base is a bound local against the local bindings and report the
selected value at the ref's location, while still descending to report
the base variable too.
Signed-off-by: Sebastian Spaink <sebastianspaink@gmail.com>
Sebastian Spaink
632d60e11e