Context function + overloading error

Question
1

Consider this code:

def withInt(unused: Boolean = false)(n: Int): Int = n + 1
def withInt(n: Int): Int                          = withInt()(n)

withInt(0) // OK

The idea is that the second function lets me write withInt(0) instead of withInt()(0).

Now, the same thing doesn’t work with context functions:

def withContext(unused: Boolean = false)(code: Int ?=> Int): Int = code(using 42)
def withContext(code: Int ?=> Int): Int                          = withContext()(code)

withContext()(summon[Int]) // OK
withContext(summon[Int]) // rejected

It only works if the second function uses a different name, e.g., withContext2.

I don’t understand why the two cases behave differently. Is that expected? (Probably not: why let me define a method that I cannot call?)

(Note also that withContext(summon[Int]) and withContext(0) give me two different errors: one related to contexts and the other to overloaded names).