-- The elts of [ModSummary] all have distinct
-- (Modules, IsBoot) identifiers, unless the Bool is true
-- in which case there can be repeats
downsweep hsc_env old_summaries excl_mods allow_dup_roots
= -- catch error messages and return them
-- The elts of [ModSummary] all have distinct
-- (Modules, IsBoot) identifiers, unless the Bool is true
-- in which case there can be repeats
downsweep hsc_env old_summaries excl_mods allow_dup_roots
= -- catch error messages and return them