QIcon::addFile() differs between Qt versions in whether entries for nonexistent files keep the icon non-null (Ubuntu CI failure). Assert on what matters: no usable pixmap or size is produced.
- common: Html doc<->HTML conversion (17), OIIOUtils (6) - cli: CLIProgressDialog rendering and CLITaskDialog (8) - timeline: undo commands for pointer/ripple/split/track/workarea (43) and general commands (22) - task: project import/load, import error dialog, cache tasks (13) - codec: OIIO decoder/encoder, planar file device, FFmpeg encoder (15) - ui: HumanStrings (6), icons (4), StyleManager (4)