[Caching] Prefix-map supplementary output file map keys#2132
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With caching + prefix mapping, a few insertions into the supplementary output file map used the original (unmapped) source path as the key, producing a phantom entry alongside the correctly remapped one. Route every key through the caching prefix map so the file map matches the paths the frontend sees. rdar://175888979
cachemeifyoucan
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artemcm,
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owenv
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@swift-ci please test |
artemcm
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May 7, 2026
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With caching + prefix mapping, a few insertions into the supplementary output file map used the original (unmapped) source path as the key, producing a phantom entry alongside the correctly remapped one. Route every key through the caching prefix map so the file map matches the paths the frontend sees.
rdar://175888979