fix 784: dont crash on huge in-memory bodies #15

Job	Run time
Soundness / Broken symlinks check	6s
Soundness / API breakage check	3m 22s
Soundness / Documentation check	2m 23s
Soundness / Format check	52s
Soundness / License headers check	3s
Soundness / Shell check	42s
Soundness / Unacceptable language check	3s
Soundness / Python lint check	31s
Soundness / YAML lint check	5s
Cxx interop / Cxx interop / Linux (5.9)	2m 2s
Cxx interop / Cxx interop / Windows (6.0)	2s
Cxx interop / Cxx interop / Linux (5.10)	2m 7s
Cxx interop / Cxx interop / Windows (nightly-6.0)	7s
Cxx interop / Cxx interop / Linux (6.0)	2m 16s
Cxx interop / Cxx interop / Windows (nightly-main)	6s
Cxx interop / Cxx interop / Linux (nightly-6.0)	2m 55s
Unit tests / Unit tests / Linux (5.9)	1m 58s
Cxx interop / Cxx interop / Linux (nightly-main)	2m 52s
Unit tests / Unit tests / Linux (5.10)	2m 6s
Unit tests / Unit tests / Windows (6.0)	2s
Unit tests / Unit tests / Linux (6.0)	4m 38s
Unit tests / Unit tests / Linux (nightly-6.0)	5m 12s
Unit tests / Unit tests / Windows (nightly-6.0)	3s
Unit tests / Unit tests / Linux (nightly-main)	5m 20s
Unit tests / Unit tests / Windows (nightly-main)	1s
	39m 54s

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