sfdx force:source:retrieve -m LightningComponentBundle

[sf9y]

Summary

Short summary of what is going on or to provide context.

sfdx force:source:retrieve -m LightningComponentBundle fails with the error

Cannot read property 'fileName' of undefined

Steps To Reproduce:

Repository to reproduce: dreamhouse-lwc

NOTE: If your issue is not reproducable by dreamhouse-lwc, i.e. requires specific metadata or files, we require a link to a simple Salesforce project repository with a script to setup a scratch org that reproduces your problem.

1. This is step 1.
2. sfdx force:source:retrieve -m LightningComponentBundle

Expected result

Describe what should have happened.

Retrieves the source

Actual result

Describe what actually happened instead.

Nothing retrieved

Additional information

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SFDX CLI Version(to find the version of the CLI engine run sfdx --version):

sfdx-cli/7.66.2 darwin-x64 node-v13.10.1

SFDX plugin Version(to find the version of the CLI plugin run sfdx plugins --core)

salesforcedx 49.2.3 (core)
├─ salesforce-alm 49.3.0 (core)
├─ @salesforce/sfdx-plugin-lwc-test 0.1.7 (core)
├─ salesforcedx-templates 48.32.0 (core)
└─ custom-metadata 1.0.7 (core)
sfdx-cli 7.66.2 (core)

OS and version:
macOS

[shetzel]

Duplicate of #496