error conformance + fixes to problems found in fuzz testing #472

Job	Run time
clang_tidy/c++11/Debug	51m 53s
clang_tidy/c++11/Debug	52m 27s
clang_tidy/c++11/Debug	49m 59s
clang_tidy/c++11/Debug	52m 8s
clang_tidy/c++11/ReleaseWithDebInfo	50m 19s
clang_tidy/c++11/ReleaseWithDebInfo	50m 9s
clang_tidy/c++11/ReleaseWithDebInfo	49m 20s
clang_tidy/c++11/ReleaseWithDebInfo	50m 9s
	6h 46m 24s

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