Index: docs/TestingGuide.rst =================================================================== --- docs/TestingGuide.rst +++ docs/TestingGuide.rst @@ -460,7 +460,10 @@ Example: ``/home/user/llvm.build/test/MC/ELF/Output/foo_test.s.tmp`` ``%T`` - Directory of ``%t``. + Directory of ``%t``. Deprecated. Shouldn't be used, because it can be easily + misused and cause race conditions between tests. + + Use ``rm -rf %t && mkdir %t`` instead if a temporary directory is necessary. Example: ``/home/user/llvm.build/test/MC/ELF/Output``