Fix exhaustiveness bug #178

Job	Run time
Select platforms	1s
linux-cross-compile / build (aarch64)	2m 17s
linux-cross-compile / build (arm)	2m 16s
linux-x64-hs-minimal / build (debug)	2m 15s
linux-x64 / build (debug)	2m 17s
linux-cross-compile / build (s390x)	2m 15s
docs / build (debug)	2m 15s
linux-x64 / build (release)	2m 16s
linux-cross-compile / build (ppc64le)	2m 14s
linux-cross-compile / build (riscv64)	1m 51s
linux-x64-hs-nopch / build (debug)	2m 16s
linux-x64-hs-optimized / build (debug)	2m 16s
linux-x64-hs-zero / build (debug)	2m 16s
linux-x86 / build (debug)	2m 15s
macos-aarch64 / build (debug)	2m 23s
windows-aarch64 / build (debug)	2m 2s
linux-x86 / build (release)	2m 16s
macos-x64 / build (debug)	2m 17s
macos-aarch64 / build (release)	2m 20s
windows-aarch64 / build (release)	2m 14s
macos-x64 / build (release)	2m 15s
windows-x64 / build (debug)	1s
windows-x64 / build (release)	1s
windows-x64	1s
linux-x64	1s
linux-x86	1s
macos-x64	1s
macos-aarch64	1s
Remove bundle artifacts	5s
	44m 59s

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