Hello, I was trying out
[ASAN](https://github.com/google/sanitizers/wiki/AddressSanitizer) with a
minimal example:
import os, strutils, algorithm
var
data: array[1000, int]
proc main: int =
fill data, -1
let idx = parseInt(paramStr(1))
result = data[idx + 100]
echo main()
Run
Compiled with `nim c --panics:on --gc:arc -d:useMalloc -t:"-fsanitize=address"
-l:"-fsanitize=address" -d:danger -g test.nim` Compile and links just fine
(`gcc-libs` are indeed installed in my system, for example `ThreadSanitizer`
works as expected).
When I try to give it faulty output:
`./test 1000`
outputs `0`, without an asan report. Similarly this example triggers no
warnings:
type
Array = object
data: ptr UncheckedArray[int]
proc `=destroy`*(x: var Array) =
if x.data != nil:
dealloc(x.data)
proc init(x: var Array) =
x.data = cast[typeof(x.data)](alloc(1000 * sizeof(int)))
proc main =
var
arr: Array
echo arr.data[0]
main()
Run
