• d-bugmail puremagic.com (37/37) Feb 21 2022 https://issues.dlang.org/show_bug.cgi?id=22801

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=22801

          Issue ID: 22801
           Summary: [REG 2.099.0-beta.1] Can't return address of return
                    ref parameter from constructor
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: regression
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: snarwin+bugzilla gmail.com

Using -preview=dip1000, the following program compiles successfully when using
DMD 2.098.1, but fails when using DMD 2.099.0-beta.1:

---
struct Wrapper
{
    int* ptr;

    this(return ref int var)  safe
    {
        this.ptr = &var;
    }
}

void main()  safe
{
    int i;
    auto w = Wrapper(i);
}
---

The error message is:

---
bug.d(7): Error: address of variable `var` assigned to `this` with longer
lifetime
---

--