Fix reverse mode complex error function #4921

Job	Run time
Enzyme CI LLVM 11 Release ubuntu-20.04	4m 14s
Enzyme CI LLVM 12 Release macOS	8m 7s
Enzyme CI LLVM 13 Release macOS XCode	5m 2s
Enzyme CI LLVM 11 Debug ubuntu-20.04	4m 0s
Enzyme CI LLVM 12 Debug macOS	5m 1s
Enzyme CI LLVM 12 Release ubuntu-20.04	4m 35s
Enzyme CI LLVM 13 Release macOS	5m 40s
Enzyme CI LLVM 13 Debug macOS	5m 34s
Enzyme CI LLVM 12 Debug ubuntu-20.04	4m 2s
Enzyme CI LLVM 14 Release macOS	7m 59s
Enzyme CI LLVM 13 Release ubuntu-20.04	4m 18s
Enzyme CI LLVM 14 Debug macOS	5m 37s
Enzyme CI LLVM 13 Debug ubuntu-20.04	3m 51s
Enzyme CI LLVM 15 Release macOS	5m 44s
Enzyme CI LLVM 14 Release ubuntu-20.04	4m 17s
Enzyme CI LLVM 15 Debug macOS	6m 4s
Enzyme CI LLVM 14 Debug ubuntu-20.04	3m 53s
Enzyme CI LLVM 16 Release macOS	6m 6s
Enzyme CI LLVM 15 Release ubuntu-20.04	4m 24s
Enzyme CI LLVM 16 Debug macOS	6m 40s
Enzyme CI LLVM 15 Debug ubuntu-20.04	4m 9s
Enzyme CI LLVM 16 Release ubuntu-20.04	4m 30s
Enzyme CI LLVM 16 Debug ubuntu-20.04	3m 47s
	1h 57m 34s

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