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Gareth Rees 764c0e1235 In mps_arena_roots_walk, don't call traceaddwhite to whiten a segment, as this calls segwhiten which has undesirable side-effects, including breaking formatting objects walking. instead, call segsetwhite to make the segment white, and set the trace's white summary to the universe. ... Add cross-reference from second-stage test in _mps_fix2 so that if the white set test is changed, the roots walking code can be changed to match. In walkt0, add a smoke test for mps_arena_roots_walk. Copied from Perforce Change: 194507		2018-07-07 22:23:24 +01:00
mps	In mps_arena_roots_walk, don't call traceaddwhite to whiten a segment, as this calls segwhiten which has undesirable side-effects, including breaking formatting objects walking. instead, call segsetwhite to make the segment white, and set the trace's white summary to the universe.	2018-07-07 22:23:24 +01:00