fix 784: dont crash on huge in-memory bodies #22

Job	Run time
Soundness / API breakage check	3m 25s
Soundness / Documentation check	2m 11s
Soundness / Unacceptable language check	5s
Soundness / License headers check	5s
Soundness / Broken symlinks check	8s
Soundness / Format check	34s
Soundness / Shell check	33s
Soundness / YAML lint check	4s
Soundness / Python lint check	4s
Cxx interop / Cxx interop / Linux (5.9)	2m 8s
Cxx interop / Cxx interop / Linux (5.10)	2m 7s
Cxx interop / Cxx interop / Linux (6.0)	2m 13s
Cxx interop / Cxx interop / Linux (nightly-6.0)	2m 45s
Cxx interop / Cxx interop / Linux (nightly-main)	2m 50s
Cxx interop / Cxx interop / Windows (6.0)	4s
Cxx interop / Cxx interop / Windows (nightly-6.0)	3s
Cxx interop / Cxx interop / Windows (nightly-main)	2s
Unit tests / Unit tests / Linux (5.9)	4m 18s
Unit tests / Unit tests / Linux (5.10)	4m 21s
Unit tests / Unit tests / Linux (6.0)	4m 41s
Unit tests / Unit tests / Linux (nightly-6.0)	5m 10s
Unit tests / Unit tests / Linux (nightly-main)	5m 9s
Unit tests / Unit tests / Windows (6.0)	2s
Unit tests / Unit tests / Windows (nightly-6.0)	2s
Unit tests / Unit tests / Windows (nightly-main)	2s
	43m 6s

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