dumping bug explained?

[Richard Stallman]

    ** address@hidden, May 18: 22.0.99 emacs dumper (?) problem
    This seems to be caused by a binary incompatible change for the malloc
    implementation in glibc. The problem would occur when emacs is built
    on one system and used on another. See 
    https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=239344#c60
    for a possible complete explanation.

Are people sure that this is the cause of the problem?
If so, the only fix it needs is an entry in PROBLEMS.