Here are some more sanitizer fixes, this time from trying with clang-11. These should go on top of jk/asan-build-fix if you want to get a successful run with "make CC=clang-11 SANITIZE=address,undefined test". I don't think any of them is indicative of a current bug in practice, but the UBSan stuff makes me worried that an aggressive compiler might do the wrong thing in some case. [1/4]: merge-recursive: silence -Wxor-used-as-pow warning [2/4]: avoid computing zero offsets from NULL pointer [3/4]: xdiff: avoid computing non-zero offset from NULL pointer [4/4]: obstack: avoid computing offsets from NULL pointer compat/obstack.h | 6 ++++-- merge-recursive.c | 19 ++++++++++++++----- sequencer.c | 6 +++--- unpack-trees.c | 2 +- xdiff-interface.c | 12 ++++++++---- 5 files changed, 30 insertions(+), 15 deletions(-) -Peff
