runtime/expr: fix malformed empty record from record spread #4359
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A record spread expression that produces an empty record (e.g., "{...a}"
evaluated with "this" bound to a Zed primitive value) results in a
zed.Value with malformed bytes, which can cause a panic elsewhere. Fix
this in recordSpreadExpr.Eval by returning a well-formed zed.Value.
For better or worse, we don't have any existing tests for malformed
zed.Values, so I'm not adding one here.
Closes #4349.
mattnibs
approved these changes
Feb 2, 2023
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A record spread expression that produces an empty record (e.g., "{...a}" evaluated with "this" bound to a Zed primitive value) results in a zed.Value with malformed bytes, which can cause a panic elsewhere. Fix this in recordSpreadExpr.Eval by returning a well-formed zed.Value.
For better or worse, we don't have any existing tests for malformed zed.Values, so I'm not adding one here.
Closes #4349.