fix 784: dont crash on huge in-memory bodies #19

Job	Run time
Soundness / API breakage check	3m 24s
Soundness / Broken symlinks check	3s
Soundness / License headers check	5s
Soundness / Documentation check	2m 27s
Soundness / Unacceptable language check	5s
Soundness / Format check	39s
Soundness / Python lint check	6s
Soundness / Shell check	35s
Soundness / YAML lint check	4s
Cxx interop / Cxx interop / Windows (6.0)	1s
Cxx interop / Cxx interop / Linux (5.9)	2m 2s
Cxx interop / Cxx interop / Windows (nightly-6.0)	1s
Cxx interop / Cxx interop / Linux (5.10)	2m 1s
Cxx interop / Cxx interop / Windows (nightly-main)	1s
Cxx interop / Cxx interop / Linux (6.0)	2m 16s
Cxx interop / Cxx interop / Linux (nightly-6.0)	2m 51s
Cxx interop / Cxx interop / Linux (nightly-main)	2m 54s
Unit tests / Unit tests / Windows (6.0)	3s
Unit tests / Unit tests / Windows (nightly-6.0)	2s
Unit tests / Unit tests / Linux (5.9)	2m 14s
Unit tests / Unit tests / Windows (nightly-main)	2s
Unit tests / Unit tests / Linux (5.10)	2m 22s
Unit tests / Unit tests / Linux (6.0)	4m 35s
Unit tests / Unit tests / Linux (nightly-6.0)	5m 8s
Unit tests / Unit tests / Linux (nightly-main)	5m 15s
	39m 16s

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