When using copyFiles: HookWebpackError: Problem deleting JS entry for _tmp_copy: 0 files were deleted

[jusurb]

HookWebpackError: Problem deleting JS entry for _tmp_copy: 0 files were deleted ()
    at makeWebpackError (sfux/node_modules/webpack/lib/HookWebpackError.js:49:9)
    at sfux/node_modules/webpack/lib/Compilation.js:2383:12
    at eval (eval at create (sfux/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:30:1)
    at fn (sfux/node_modules/webpack/lib/Compilation.js:373:17)
    at Hook.eval [as callAsync] (eval at create (sfux/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:27:1)
    at Hook.CALL_ASYNC_DELEGATE [as _callAsync] (sfux/node_modules/tapable/lib/Hook.js:18:14)
    at cont (sfux/node_modules/webpack/lib/Compilation.js:2380:34)
    at sfux/node_modules/webpack/lib/Compilation.js:2426:10
    at sfux/node_modules/neo-async/async.js:2830:7
    at Object.each (sfux/node_modules/neo-async/async.js:2850:39)
-- inner error --
Error: Problem deleting JS entry for _tmp_copy: 0 files were deleted ()
    at sfux/node_modules/@symfony/webpack-encore/lib/webpack/delete-unused-entries-js-plugin.js:49:27
    at Set.forEach (<anonymous>)
    at deleteEntries (sfux/node_modules/@symfony/webpack-encore/lib/webpack/delete-unused-entries-js-plugin.js:18:28)
    at sfux/node_modules/@symfony/webpack-encore/lib/webpack/delete-unused-entries-js-plugin.js:59:17
    at sfux/node_modules/webpack/lib/Compilation.js:474:56
    at fn (sfux/node_modules/webpack/lib/Compilation.js:371:10)
    at Hook.eval [as callAsync] (eval at create (sfux/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:27:1)
    at Hook.CALL_ASYNC_DELEGATE [as _callAsync] (sfux/node_modules/tapable/lib/Hook.js:18:14)
    at cont (sfux/node_modules/webpack/lib/Compilation.js:2380:34)
    at sfux/node_modules/webpack/lib/Compilation.js:2426:10
caused by plugins in Compilation.hooks.processAssets
Error: Problem deleting JS entry for _tmp_copy: 0 files were deleted ()
    at sfux/node_modules/@symfony/webpack-encore/lib/webpack/delete-unused-entries-js-plugin.js:49:27
    at Set.forEach (<anonymous>)
    at deleteEntries (sfux/node_modules/@symfony/webpack-encore/lib/webpack/delete-unused-entries-js-plugin.js:18:28)
    at sfux/node_modules/@symfony/webpack-encore/lib/webpack/delete-unused-entries-js-plugin.js:59:17
    at sfux/node_modules/webpack/lib/Compilation.js:474:56
    at fn (sfux/node_modules/webpack/lib/Compilation.js:371:10)
    at Hook.eval [as callAsync] (eval at create (sfux/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:27:1)
    at Hook.CALL_ASYNC_DELEGATE [as _callAsync] (sfux/node_modules/tapable/lib/Hook.js:18:14)
    at cont (sfux/node_modules/webpack/lib/Compilation.js:2380:34)
    at sfux/node_modules/webpack/lib/Compilation.js:2426:10

this only occurs when using copyFiles:

.copyFiles([
    {
      from: './node_modules/bootstrap/dist/fonts/',
      to: 'fonts/[name].[hash:8].[ext]',
    },
  ])

files are webfonts ending in extensions: eot, woff, ttf, woff2

@symfony/webpack-encore@1.0.5
webpack 5.21.2
webpack-cli 4.5.0
webpack-dev-server 4.0.0-beta.0

[jusurb]

turns out

.configureFontRule({
    filename: 'images/[name].[hash:8][ext]',
    type: 'asset'
  })

was all i needed, so copyFiles is not required