com.unity.burst 1.3.0-preview.4 Package Notes

Debug information for types
Debug information for local variables
Debug information for function parameters
Support for `fixed` statements. These are useful when interacting with `fixed` buffers in structs, to get at the pointer data underneath.
A fast-math optimization for comparisons that benefits the BurstBenchmarks that nxrightthere has put together.
DOTS Runtime Jobs will now generate both `MarshalToBurst` and `MarshalFromBurst` functions when job structs in .Net builds are not blittable.
DOTS Runtime Job Marshalling generation is now controllable via the commandline switch `--generate-job-marshalling-methods`.

Made it clear that the Burst aliasing intrinsics are tied to optimizations being enabled for a compilation.
Restore unwind information for all builds
Print a info message if compiling a function pointer with missing MonoPInvokeCallback attribute (this can lead to runtime issues on IL2CPP with Burst disabled). The message will be converted to a warning in future releases

Fixed an issue where DOTS Runtime generated job marshalling functiosn may throw a `FieldAccessException` when scheduling private and internal job structs.
Fix a bug that prevented entry point method names (and their declaring type names) from having a leading underscore
vector/array/pointer debug data now utilizes the correct size information
DOTS Runtime will now only generate job marshaling functions on Windows, as all other platforms rely on Mono which does not require job marshalling.
`ldobj` / `stobj` of large structs being copied to stack-allocated variables could cause compile-time explosions that appeared to the user like the compiler had hung. Worked around these by turning them into memcpy's underneath in LLVM.
Don't always use latest tool chain on certain platforms.
Fix a crash when compiling job or function pointer that was previously cached, then unloaded, then reloaded
Fixed compiler error in array element access when index type is not `Int32`
Fix `set1_xxx` style x86 intrinsics generated compile time errors

Native debugger feature is only available on windows host platform at the moment.

com.unity.burst 1.3.0-preview.4