error conformance + fixes to problems found in fuzz testing #471

Job	Run time
clang_tidy/c++11/Debug	50m 4s
clang_tidy/c++11/Debug	49m 48s
clang_tidy/c++11/Debug	50m 44s
clang_tidy/c++11/Debug	51m 32s
clang_tidy/c++11/ReleaseWithDebInfo	51m 41s
clang_tidy/c++11/ReleaseWithDebInfo	50m 0s
clang_tidy/c++11/ReleaseWithDebInfo	51m 1s
clang_tidy/c++11/ReleaseWithDebInfo	50m 23s
	6h 45m 13s

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