[Issue 22372] Loop index incorrectly optimised out for -release -O

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22372

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
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                 CC|                            |bugzilla at digitalmars.com

--- Comment #10 from Walter Bright <bugzilla at digitalmars.com> ---
A simplified version:

import core.stdc.stdio;

struct S { int a1, a2, a3; }

void throws2ndCall(ref S x)
{
    __gshared bool b;
    if (b)
        throw new Exception("n == 1");
    b = true;
}

void main()
{
    S[] arr = [S(), S()];
    size_t i;
    try
    {
        for (i = 0; i < 2; i++)
            throws2ndCall(arr[i]);
    }
    catch (Exception o)
    {
        printf("Exception: i = %lu\n", i);  // prints 0
        assert(i == 1);  // this fails
    }
}

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