[BUG] Address Sanitizer builds crash irregularly

[vrakesh]

Bug description

I have been expermenting to learn Mojo pointers

Here is the example code I am testing with sanitizer build

filename: pointers.mojo

# Purpose of this code is to understand pointers in mojo

fn main():
    alias num_elements = 3
    var intp: Pointer[Int] = Pointer[Int].alloc(num_elements)
    # assign some values to int
    for i in range(num_elements):
        intp[i] = i
    var sum_int: Int = 0
    print("sum of")
    for i in range(num_elements):
        print(i)
        sum_int += intp[i]
    print("is", sum_int)
    intp.free()

Consecutive runs of a binary build with

mojo build --sanitize address pointers.mojo

produce the following output

$ ./pointers 
sum of
0
1
2
is 3
$ ./pointers 
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
AddressSanitizer:DEADLYSIGNAL
Segmentation fault (core dumped)
$ ./pointers 
sum of
0
1
2
is 3

Steps to reproduce

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System information

- What OS did you do install Mojo on ?
Linux
- Provide version information for Mojo by pasting the output of `mojo -v`
mojo 24.2.1 (2f0dcf11)
- Provide Modular CLI version by pasting the output of `modular -v`
mojo 24.2.1 (2f0dcf11)