• via Digitalmars-d-bugs (48/48) Jan 26 2015 https://issues.dlang.org/show_bug.cgi?id=14051

via Digitalmars-d-bugs <digitalmars-d-bugs puremagic.com> writes:

https://issues.dlang.org/show_bug.cgi?id=14051

          Issue ID: 14051
           Summary: Invariant gets invoked after destruction for structs
                    with File members
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: DMD
          Assignee: nobody puremagic.com
          Reporter: bayan.rafeh92 gmail.com

When a class with a File as a member of the class, the invariant block gets
invoked incorrectly, twice before destruction and once after destruction.

An example code snippet:

// Written by Ali Çehreli
import std.stdio;

void main(){
    writeln("entered main");
    auto a = new A();
    writeln("leaving main");
}

class A {
    File file;

    this() {
        writeln("this");
    }

    ~this() {
        writeln("~this");
    }

    invariant() {
        writeln("invariant");
    }
}

The previous code produces the following output:
entered main
this
invariant
leaving main
invariant
invariant    <-- ?
~this
invariant    <-- ?

The forum thread where this issue was found:

http://forum.dlang.org/thread/ossuvfmqthllgdpgzntm forum.dlang.org

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