Merge pull request #487 from isuruf/subs-except #332

Job	Run time
build (Debug, yes, 3.12, yes, ubuntu-20.04, gcc)	3m 58s
build (Debug, yes, 3.11, yes, ubuntu-20.04, gcc)	3m 49s
build (Debug, yes, 3.10, yes, ubuntu-20.04, gcc)	4m 3s
build (Debug, yes, 3.9, yes, ubuntu-20.04, gcc)	3m 54s
build (Release, 3.8, yes, ubuntu-20.04, gcc)	4m 43s
build (Release, 3.8, yes, gmpxx, no, ubuntu-20.04, gcc)	4m 47s
build (Release, 3.8, yes, ubuntu-20.04, gcc)	4m 51s
build (Release, yes, 3.8, ubuntu-20.04, gcc)	4m 45s
build (Release, 3.9, yes, ubuntu-20.04, gcc)	4m 44s
build (Release, 3.9, yes, flint, yes, ubuntu-20.04, gcc)	5m 11s
build (Debug, 3.8, yes, yes, ubuntu-20.04, clang)	3m 24s
build (Release, 3.8, yes, ubuntu-20.04, clang)	4m 12s
build (Debug, 3.10, yes, 14, yes, boostmp, -k "not integer_nthroot", ubuntu-22.04, deb http://apt...	5m 38s
build (Debug, 3.8, yes, 5, macos-13, clang)	8m 12s
build (Release, 3.9, no, macos-13, clang)	7m 37s
build (Debug, 3.8, no, macos-13, gcc)	5m 51s
build (Release, 3.8, macos-13, gcc)	7m 15s
build (Release, 3.11, ubuntu-20.04, yes, yes, yes, yes, yes, yes, flint, yes, gcc)	4m 55s
	1h 31m 49s

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