merge revision(s) 97426e15d721119738a548ecfa7232b1d027cd34: [Backport #18627]

	[Bug #18627] Fix crash when including module

	During lazy sweeping, the iclass could be a dead object that has not yet
	been swept. However, the chain of superclasses of the iclass could
	already have been swept (and become a new object), which would cause a
	crash when trying to read the object.
	---
	 class.c | 48 ++++++++++++++++++++++++++++++------------------
	 1 file changed, 30 insertions(+), 18 deletions(-)

0 files changed, 0 insertions, 0 deletions