Problem: Vim9: dereferences NULL pointer in check_type_is_value() #764

Job	Run time
macos (tiny, macos-12)	1m 16s
macos (tiny, macos-14)	59s
windows (HUGE, msvc, no, no, x64, stable)	6m 53s
windows (HUGE, mingw, yes, yes, x86, stable, yes)	10m 49s
macos (normal, macos-12)	6m 35s
linux (tiny, clang, native)	2m 44s
windows (HUGE, msvc, no, yes, x86)	8m 3s
linux (tiny, gcc, native)	6m 37s
macos (normal, macos-14)	4m 42s
linux (normal, clang, native)	6m 3s
macos (huge, macos-12)	14m 25s
windows (HUGE, mingw, yes, no, x64, yes)	10m 9s
linux (normal, gcc, native)	9m 48s
macos (huge, macos-14)	12m 35s
windows (NORMAL, msvc, yes, no, x86)	6m 23s
linux (huge, clang, native)	9m 50s
windows (NORMAL, mingw, no, yes, x64)	9m 16s
linux (huge, gcc, native)	16m 3s
windows (TINY, msvc, yes, yes, x64)	1m 41s
linux (tiny, clang, nogui)	2m 12s
windows (TINY, mingw, no, no, x86)	2m 21s
linux (tiny, gcc, nogui)	6m 7s
linux (normal, gcc, i386, ./src/shadow)	11m 54s
linux (huge, gcc, uchar, testgui, true, dynamic)	14m 48s
linux (huge, clang, asan, 5.1)	17m 41s
linux (huge, gcc, unittests, true)	5m 50s
linux (normal, gcc, vimtags)	7m 40s
	3h 33m 24s

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