<cfbolz>
arigo_: ok, I went back to basics and ignored the black->white assertion error that PYPY_GC_DEBUG produced. I may be making some progress now
<cfbolz>
yes, I got it :-(
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<cfbolz>
arigo_: it's a bug in writebarrier_before_copy
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<cfbolz>
arigo_: basically the logic in writebarrier_before_copy is only concerned with whether its correct for young/old objects
<cfbolz>
it does not consider at all that the write barrier is also used in *inc*minimark to find out which objects need to turned from black to grey and traced again