In init_copy, set shape after copying ivars
GC uses shapes to determine IV buffer width. Since allocation can trigger GC, we need to ensure we only set the shape once we've fully allocated new memory for the IV buffer, otherwise the GC can end up trying to mark invalid memory.
Added by jemmai (Jemma Issroff) about 3 years ago
In init_copy, set shape after copying ivars
GC uses shapes to determine IV buffer width. Since allocation can
trigger GC, we need to ensure we only set the shape once we've fully
allocated new memory for the IV buffer, otherwise the GC can end up
trying to mark invalid memory.