Per the golang specification:

At package level, initialization dependencies determine the evaluation order of individual initialization expressions in variable declarations. Otherwise, when evaluating the operands of an expression, assignment, or return statement, all function calls, method calls, and communication operations are evaluated in lexical left-to-right order.

This means that this code

return imp.insertionCount, channelQuorumError(processingErrChan, 2)

will return zero per the go language spec.