Tested on: iPhone11+iOS16.5/iPhoneXS+iOS15.4. Compile with: XCode12/13/14. I tried following code, compile with arch=arm64e only, and result in crash "EXC_BAD_ACCESS". at "LDRAA" std::cout << ""; The crash will not be triggered if: compile with arch=arm64 only compile with arch=arm64e only and tested on iOS<=14 not use any c++ I/O api

Compiler: XCode12/13/14 Tested On: iPhoneXS+iOS15.4 / iPhone11+iOS16.5 I tried to compile following code with arch=arm64e and run, it crashed with EXC_BAD_ACCESS at 'LDRAA', seems occur when trying to access c++ v-table. And this bug will not occur in following conditions. c++ I/O api is easy to trigger the bug. compile with arch=arm64 and run on arm64e device compile with arch=arm64e and run on arm64e device with iOS<=14 #include <fstream> #include <stringstream> int main(int argc, char** argv) { std::ifstream MyReadFile("/System/Library/CoreServices/SystemVersion.plist"); // crash1 std::stringstream stream; stream << std::hex << 0; // crash2 } I also tried c++11/14/17/20, it makes no difference.