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Ensure cache miss to fix ESM compiling #283

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nickhudkins
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@nickhudkins nickhudkins commented Apr 28, 2020

In this discussion: #234 that introduced the change to cacheKey in localNameCache, the author referenced a comment you made here:
#230 (comment)

in which, you indicated that the false value there was to ensure that the traversal would continue again until you either picked up the import or dynamically injected it (I think?)

When the code was changed to account for this it failed to maintain the same behavior in the case that localName was intentionally left false.

This change ensures that the previous behavior (allowing the intentionally set false to fall through the cache lookup) remains, while ensuring a false value in the cache does not ALSO fall through.

Pardon the lack of supporting test. The only way I was able to reproduce this issue was when I was using rollup / babel to compile. I am still investigating what this difference is specifically to hopefully introduce a failing test prior to this commit.

@nickhudkins
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@probablyup welp, I am fully at a loss for how to test this. Do you have any guidance? I am also happy to cowboy it and say "It works with rollup, thanks"

@marvinhagemeister
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Can confirm that this fixes the issue for me 👍

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@quantizor quantizor left a comment

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Looks good to me! Thanks @nickhudkins

@quantizor quantizor merged commit b1dcfda into styled-components:master Jul 29, 2020
khmm12 added a commit to khmm12/babel-plugin-styled-components that referenced this pull request Jul 30, 2020
quantizor pushed a commit that referenced this pull request Jul 30, 2020
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3 participants