• d-bugmail puremagic.com (40/40) Dec 16 2017 https://issues.dlang.org/show_bug.cgi?id=18090

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=18090

          Issue ID: 18090
           Summary: missleading Error-Message when assigning pointers in
                     safe struct
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: mephisto nordhoff-online.de

file: app.d
~~~~~~~~~~~~~~~~~~~~~

void main() {
    A a = A( true);
}

 safe

struct A {
    bool *lala;

    this( bool i) {
        lala = &aVar;
    }

    bool aVar = true;
}

~~~~~~~~~~~~~~~~~~~~~


$ dmd --version
DMD64 D Compiler v2.077.1
...
$
$ dmd app.d 
app.d(13): Error: address of variable this assigned to this with longer
lifetime
$



The error message makes sense, but it may take a while to see the problem.
Maybe it would be worth mentioning that `this` is a value type who can be
copied.

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