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alexanderankin
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Mar 8, 2026
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This change preserves all instances of the same @Arggroup across all commands it is applied to.
fixes #2407
It looks like when an ArgGroup is reused, it is overwritten in argGroupElementsByType when being parsed (but not in argGroupElementsByVar which has actual unique keys). This means when iterating through argGroupElementsByVar later in the process, it hits ArgGroupBuilders that were not fully populated in connectModel() (which iterates over argGroupElementsByType), leading to a failure to fully realize the ArgGroupSpec in its constructor (when args.isEmpty() and subgroups.isEmpty()).