fix 784: dont crash on huge in-memory bodies #20

Job	Run time
Soundness / API breakage check	3m 26s
Soundness / Broken symlinks check	3s
Soundness / Documentation check	2m 26s
Soundness / Format check	39s
Soundness / License headers check	9s
Soundness / Unacceptable language check	2s
Soundness / Python lint check	6s
Soundness / Shell check	36s
Soundness / YAML lint check	3s
Cxx interop / Cxx interop / Linux (5.9)	2m 14s
Cxx interop / Cxx interop / Linux (5.10)	2m 5s
Cxx interop / Cxx interop / Windows (6.0)	3s
Cxx interop / Cxx interop / Linux (6.0)	2m 11s
Cxx interop / Cxx interop / Windows (nightly-6.0)	2s
Unit tests / Unit tests / Linux (5.9)	4m 20s
Cxx interop / Cxx interop / Linux (nightly-6.0)	2m 49s
Cxx interop / Cxx interop / Windows (nightly-main)	1s
Cxx interop / Cxx interop / Linux (nightly-main)	2m 50s
Unit tests / Unit tests / Linux (5.10)	4m 15s
Unit tests / Unit tests / Linux (6.0)	4m 28s
Unit tests / Unit tests / Windows (6.0)	3s
Unit tests / Unit tests / Linux (nightly-6.0)	5m 1s
Unit tests / Unit tests / Windows (nightly-6.0)	3s
Unit tests / Unit tests / Linux (nightly-main)	5m 5s
Unit tests / Unit tests / Windows (nightly-main)	1s
	43m 1s

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