Don't allocate in exception handler #3048

Job	Run time
docs-pr	7s
spell check with typos	6s
check license headers	6s
code-checks / linux-checks	2m 12s
code-checks / windows-checks	19s
build-guests (debug) / build-guests	59s
build-guests (release) / build-guests	2m 12s
report-ci-status	4s
benchmarks	0s
run-examples	0s
fuzzing	0s
build-test	0s
	6m 5s

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