  Small-scale eruptions could play an important role in coronal heating,
generation of solar energetic particles (SEPs), and mass source of the solar
wind. However, they are poorly observed, and their characteristics,
distributions, and origins remain unclear. Here a mini coronal dimming was
captured by the recently launched Solar Orbiter spacecraft. The observations
indicate that a minifilament eruption results in the dimming and takes away
approximately $(1.65\pm0.54)\times10^{13}$ g of mass, which also exhibits
similar features as the sources of SEP events. The released magnetic free
energy is of the order of $\sim10^{27}$ erg. Our results suggest that weak
constraining force makes the flux rope associated with the minifilament easily
enter a torus-unstable domain. We discuss that weak magnetic constraints from
low-altitude background fields may be a general condition for the quiet-Sun
eruptions, which provide a possible mechanism for the transport of coronal
material and energy from the lower to the middle or even higher corona.
