Sorry for the nonsensical title. Iβm a little drunk. Anyway, hereβs a crash: ==15384==ERROR: AddressSanitizer: attempting to call malloc_usable_size() for pointer which is not owned: 0x0000004df3e0 #0 0x7ff6c5231fd4 in __sanitizer::BufferedStackTrace::UnwindImpl(unsigned __int64, unsigned __int64, void *, bool, unsigned int) C:\src\llvm_package_1100-final\llvm-project\compiler-rt\lib\asan\asan_stack.cpp:77 #1 0x7ff6c524d646 in __asan::asan_malloc_usable_size(void const *, unsigned __int64, unsigned __int64) C:\src\llvm_package_1100-final\llvm-project\compiler-rt\lib\asan\asan_allocator.cpp:986...