Function rustc_const_eval::const_eval::try_destructure_const

pub(crate) fn try_destructure_const<'tcx>(
    tcx: TyCtxt<'tcx>, 
    param_env: ParamEnv<'tcx>, 
    val: Const<'tcx>
) -> InterpResult<'tcx, DestructuredConst<'tcx>>

This function should never fail for validated constants. However, it is also invoked from the pretty printer which might attempt to format invalid constants and in that case it might fail.