[Issue 24630] New: Casting a bool pointer to a mutable pointer type is unsafe

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24630

          Issue ID: 24630
           Summary: Casting a bool pointer to a mutable pointer type is
                    unsafe
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: nick at geany.org

Inverse of issue 24582.

    bool v;
    auto bp = cast(byte*) &v;
    *bp = 2; // v is now invalid

Same goes for runtime cast from bool[] to byte[]. If the target element type is
const then the cast is safe.

PR incoming.

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