Store heap interval as field in AllocationsContext in order to skip useless panics

[grishasobol]

File Location(s)

core/src/memory.rs

Proposal

/// Pages allocations context for the running program.
#[derive(Debug)]
pub struct AllocationsContext {
    /// Pages which has been in storage before execution
    init_allocations: IntervalsTree<WasmPage>,
    allocations: IntervalsTree<WasmPage>,
    heap: Option<Interval<WasmPage>>, // static_pages..max_pages, None if heap is empty
}