Fix printing multiple warning messages for unused fields in [registries] table #12439
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Cargo currently prints the same warning message multiple times for unexpected fields in the
[registries.<registry>]
or[registry]
tables. This is because Cargo warns each time that the structure is deserialized fromConfig
. Depending on which code path is taken I've seen the warning printed up to 6 times.Config
struct.A test is added to ensure both
[registries]
and[registry]
only warn once for unexpected fields.