fix(middleware): log invalid filetype (#3292)
fix(middleware): log invalid filetype (#3292)

Fixes #3291
karma-runner/karma,johnjbarton/karma,johnjbarton/karma,karma-runner/karma,johnjbarton/karma,david-garcia-nete/karma,maksimr/karma,maksimr/karma,karma-runner/karma,david-garcia-nete/karma,karma-runner/karma,johnjbarton/karma,david-garcia-nete/karma,maksimr/karma