../include/hobbes/mc/encode.H:1625:53: runtime error: store to misaligned address 0x7ffcf203b3f2 for type 'const void *', which requires 8 byte alignment
0x7ffcf203b3f2: note: pointer points here
../lib/hobbes/lang/type.C:2365:9: runtime error: load of misaligned address 0x607000e849ab for type 'const int', which requires 4 byte alignment
0x607000e849ab: note: pointer points here
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placement new has to ensure buffer is properly aligned
reinterpret_cast<T*>(p) has to ensure p points to a legit T object, if T is not a byte-like type. Until we have std::bitcast in C++20, any casts in C++ won't start an object lift time, so this cast simply casts a memory space to a non-existing object. And reinterpret_cast has the alignment issue as well
Running
hobbes-testwith UBSan, got errors likereinterpret_cast<T*>(p)has to ensureppoints to a legitTobject, ifTis not a byte-like type. Until we havestd::bitcastin C++20, any casts in C++ won't start an object lift time, so this cast simply casts a memory space to a non-existing object. Andreinterpret_casthas the alignment issue as well