Why the numbers are wrong, when I use range(1, 101) in Geany?

Question

When I use range(1, 101) in Geany, something strange happens. What's wrong?

This is my code:

for number in range(1, 101):
    print(number)

This is what I got in Geany:

7
7
7
8
8
8
8
8
8
86
87
88
89
90
91
92
93
94
95
96
97
98
99
10

I've tried the same code in terminal, it worked well. But in Geany, it didn't work. HELP!