Function contains infinite loops, and it seems everything is ok

I wrote function, that input array is list of intervals and returns nonoverlapping intervals.
Here is the function:

def mergeOverlappingIntervals(intervals):
    new=[]
    i=0
    while i <len(intervals):    
        if intervals[i][1]<intervals[i+1][0]:
            new.append(intervals[i])
            i+=1
        else:
            p1=i
            p2=i
            while intervals[i][1]<=intervals[i+1][0]:
              i+=1
              p2+=1
            new.append([intervals[p1][0],intervals[p2][1]])
            i=p2
    return new  

but this function contains infinite loops. It is unclear to me, why this function contains infinite loops and does not get expected outputs.
Example of inputs:

interval=[
    [1, 2],
    [3, 5],
    [4, 7],
    [6, 8],
    [9, 10]
  ]

outputs=[
  [1, 2],
  [3, 8],
  [9, 10]
]

>Solution :

Your inner while loop uses the wrong condition. You want to merge two intervals when intervals[i][1] is greater than or equal to, not less than or equal to, intervals[i+1][0].

while intervals[i][1] >= intervals[i+1][0]:
    i += 1
    p2 += 1

There may be other issues, but this one stands out as the primary problem.