If an error occurs inside a function (1) the error is reported, (2) the function interrupts, (3) the caller of the function continues to run.
f = function
print "f 1"
ERROR
print "f 2"
end function
g = function
print "g 1"
f
print "g 2"
end function
g
Running the program prints:
g 1
f 1
Runtime Error: Undefined Identifier: 'ERROR' is unknown in this context [line 4]
g 2
Not observed in Mini Micro.