Incorrect type hints cause segfault.

The following code provides a type hint that indicates that the variable a should be a list of integers while the actual type is int. Then codon gets a segfault. CPython can normally print "1" with this test.

test.py
```
a = 1 # a: int
a: list[int]
print(a)
```
The actual output: Segmentation Fault
The expected output: 1

Reproduce step:
> download the Pre-built binaries for Linux
> Type " codon run --release test.py" in the console.

Environment:
Ubuntu 18.04
Codon v0.16.0
CPython 3.10.8