http://d.puremagic.com/issues/show_bug.cgi?id=11393

           Summary: GC realloc and free don't ignore interior pointers
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: druntime
        AssignedTo: nobody@puremagic.com
        ReportedBy: safety0ff.bugz@gmail.com


--- Comment #0 from safety0ff.bugz <safety0ff.bugz@gmail.com> 2013-10-30 18:29:45 PDT ---
The documentation / spec [1][2] states that realloc and free should do nothing when they're passed interior pointers.

Currently realloc / free still operate on the underlying memory blocks regardless.

I started working on the fix for realloc but decided that it should really be discussed before spending more time on it.

Discuss :)

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[1] http://dlang.org/phobos/core_memory.html#.GC.realloc [2] http://dlang.org/phobos/core_memory.html#.GC.free

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--- Comment #1 from safety0ff.bugz <safety0ff.bugz@gmail.com> 2013-10-30 18:41:25 PDT ---
I suppose this should have been spit into two bugs, but for now we can keep the discussion focused.

The reason fixing realloc requires discussion is that fixing this may break exiting code in the case where it is passed an interior pointer with a non zero size parameter.

Fixing the case where the pointer is internal and either realloc is called with size zero or free is called does not break existing code unless the GC is disabled, where it will cause memory leaks.

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--- Comment #2 from safety0ff.bugz <safety0ff.bugz@gmail.com> 2013-11-03 11:25:28 PST ---
Discussion thread: http://forum.dlang.org/thread/qmiayckycycetnumulbn@forum.dlang.org

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