https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65126
--- Comment #1 from vries at gcc dot gnu.org ---
Presumably same thing happens for pr47218.C, which saves temps:
...
/* { dg-options "-save-temps" } */
...
And cleans them up:
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// { dg-final { cleanup-saved-temps }
...
but also has additional sources:
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/* { dg-additional-sources "pr47218-1.C" } */
...
Of which the temps are not cleaned up:
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pr47218-1.o pr47218-1.ii pr47218-1.s
...
