Tests

A bunch of Coverity warnings fixes #301

Job	Run time
Upgrade test (gcc, fuse3, ubuntu-24.04, stable-5.0)	51s
Upgrade test (gcc, fuse3, ubuntu-24.04, stable-6.0)	49s
Test suite (aarch64) (gcc, fuse, ubuntu-22.04)	41s
Test suite (x86_64) (gcc, fuse, ubuntu-22.04)	24s
Upgrade test (gcc, fuse3, ubuntu-24.04, main)	1m 48s
Test suite (aarch64) (gcc, fuse, ubuntu-24.04)	1m 0s
Test suite (x86_64) (gcc, fuse, ubuntu-24.04)	45s
Test suite (aarch64) (gcc, fuse3, ubuntu-22.04)	40s
Test suite (x86_64) (gcc, fuse3, ubuntu-22.04)	18s
Test suite (aarch64) (gcc, fuse3, ubuntu-24.04)	59s
Test suite (x86_64) (gcc, fuse3, ubuntu-24.04)	38s
Test suite (aarch64) (clang, fuse, ubuntu-22.04)	1m 5s
Test suite (x86_64) (clang, fuse, ubuntu-22.04)	20s
Test suite (aarch64) (clang, fuse, ubuntu-24.04)	1m 18s
Test suite (x86_64) (clang, fuse, ubuntu-24.04)	48s
Test suite (aarch64) (clang, fuse3, ubuntu-22.04)	59s
Test suite (x86_64) (clang, fuse3, ubuntu-22.04)	22s
Test suite (aarch64) (clang, fuse3, ubuntu-24.04)	1m 19s
Test suite (x86_64) (clang, fuse3, ubuntu-24.04)	42s
	15m 46s

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