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git-svn-id: https://svn.r-project.org/R/trunk@63305 00db46b3-68df-0310-9c12-caf00c1e9a41
fix PR15377

git-svn-id: https://svn.r-project.org/R/trunk@63306 00db46b3-68df-0310-9c12-caf00c1e9a41
fix PR#15344, 15191

git-svn-id: https://svn.r-project.org/R/trunk@63307 00db46b3-68df-0310-9c12-caf00c1e9a41