Stop mask error upon running DRC in Eagle 7.3.0
Change the font of the name to be 'Vector', not 'Proportional' - you can do this by smashing the component with the smash tool and then editing the text. Otherwise Eagle requires clearance around the text. 

Alternatively, and especially in this case, you should move the C1 name label into the free space near the component so that it doesn't overlap the stop layers and importantly isn't partly covered by the IC outline otherwise readability is affected. Again this is done using the smash tool which allows the text to be moved separately from the component.