Handle additional memory requests made by `RCOMBBASE` #4494

Job	Run time
rustfmt	12s
Clippy	48s
no-std (stable, wasm32-unknown-unknown)	1m 10s
Check Rust stable on ubuntu with --all-targets --no-default-features	41s
no-std (nightly, wasm32-unknown-unknown)	56s
Check Rust stable on ubuntu with --all-targets	41s
Test Rust stable on ubuntu with --profile test-release	5m 23s
Test Rust nightly on windows-2022	0s
Check Rust stable on ubuntu with --all-targets --all-features	41s
Test Rust stable on ubuntu with --profile test-release --doc	3m 2s
Check Rust nightly on ubuntu with --all-targets --no-default-features	44s
Test Rust nightly on ubuntu with --profile test-release	5m 34s
Check Rust nightly on ubuntu with --all-targets	48s
Test Rust nightly on ubuntu with --profile test-release --doc	3m 7s
Check Rust nightly on ubuntu with --all-targets --all-features	47s
	24m 34s

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