When compiling for Darwin, sigset is not initialized. When -Werror,-Wuninitialized-const-reference are enabled we see the error: asan_interceptors.cpp:260:38: error: variable 'sigset' is uninitialized when passed as a const reference argument here [-Werror,-Wuninitialized-const-reference] This fixes the error
Compiler-RT ================================ This directory and its subdirectories contain source code for the compiler support routines. Compiler-RT is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. ================================