Pharborist errors reported multiple times

For some reason when Pharborist encounters a parse error, it's spitting it out multiple times. See various examples at #2425401: [meta] Attempt to upgrade several modules to Drupal 8 and see what breaks, such as:

Error at 2673:70 in /Users/webchick/Sites/8.x/modules/mollom/mollom.module: invalid expression                                                                  [error]
Error at 2673:70 in /Users/webchick/Sites/8.x/modules/mollom/mollom.module: invalid expression                                                                  [error]
Error at 2673:70 in /Users/webchick/Sites/8.x/modules/mollom/mollom.module: invalid expression                                                                  [error]
Error at 2673:70 in /Users/webchick/Sites/8.x/modules/mollom/mollom.module: invalid expression                                                                  [error]
Error at 2673:70 in /Users/webchick/Sites/8.x/modules/mollom/mollom.module: invalid expression                                                                  [error]
Error at 2673:70 in /Users/webchick/Sites/8.x/modules/mollom/mollom.module: invalid expression                                                                  [error]