[Issue 19881] New: Escaping reference to local through return scope with -dip1000 and @safe

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19881

          Issue ID: 19881
           Summary: Escaping reference to local through return scope with
                    -dip1000 and @safe
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: major
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: simen.kjaras at gmail.com

@safe int* fun(return scope int* input) {
    int local = 123;
    input = &local; // This line shouldn't compile

    return input;
}

@safe void main() {
    import std.stdio;
    int* p;
    p = fun(p);
    (*p).writeln; // 123
    (*p).writeln; // Random garbage
}

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