Using ember-moment in Ember 3.18 fails to produce production build about ember-moment HOT 8 CLOSED

We have the same problem with [email protected] and sometimes get the following error (only in production build):

...
Merge error: conflicting capitalizations:
moment/locale/en-SG.js in /tmp/broccoli-14632r7VYmVxi9CXp/out-118-broccoli_persistent_filter_mapper
moment/locale/en-sg.js in /tmp/broccoli-14632r7VYmVxi9CXp/out-118-broccoli_persistent_filter_mapper
Remove one of the files and re-add it with matching capitalization.
...

The problem seems to be moment itself. Since moment@^2.25.0 the file en-SG.js was renamed to en-sg.js.

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@deanmraz, it is easier with yarn. In your package.json add block

  "resolutions": {
    "moment": "2.24.0"
  }

and then yarn install

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@deanmraz I confirm the error with moment@^2.25.0.
Just specify "moment": "2.24.0" for submodules.
instruction for yarn, instruction for npm

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@dmaok How would you implement that? It looks like npm pulled both versions of moment 2.24.0 & 2.25.0.

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@dmaok that worked, thank you!

This is a good short term fix, but what is the ideal solution? Does this need to be fixed in this repo or the actual moment repo?

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According to terser/terser#684 this is a moment issue though there isn't a specific ticket there yet https://github.com/moment/moment/issues

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Fixed in [email protected] - thanks to @jrjohnson

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@jasonmit confirmed! thanks everyone for the help

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