Problem: cannot change buffer in a popup #693

Job	Run time
macos (tiny, macos-12)	1m 11s
windows (HUGE, msvc, no, no, x64, stable)	6m 30s
macos (tiny, macos-14)	45s
windows (HUGE, mingw, yes, yes, x86, stable, yes)	2m 41s
linux (tiny, clang, native)	8s
macos (normal, macos-12)	6m 27s
windows (HUGE, msvc, no, yes, x86)	8m 13s
linux (tiny, gcc, native)	10s
macos (normal, macos-14)	4m 41s
windows (HUGE, mingw, yes, no, x64, yes)	3m 28s
linux (normal, clang, native)	12s
macos (huge, macos-12)	1m 9s
windows (NORMAL, msvc, yes, no, x86)	6m 15s
linux (normal, gcc, native)	8s
macos (huge, macos-14)	43s
windows (NORMAL, mingw, no, yes, x64)	9m 3s
linux (huge, clang, native)	11s
windows (TINY, msvc, yes, yes, x64)	1m 55s
linux (huge, gcc, native)	12s
windows (TINY, mingw, no, no, x86)	2m 46s
linux (tiny, clang, nogui)	8s
linux (tiny, gcc, nogui)	6s
linux (normal, gcc, i386, ./src/shadow)	8s
linux (huge, gcc, uchar, testgui, true, dynamic)	12s
linux (huge, clang, asan, 5.1)	11s
linux (huge, gcc, unittests, true)	11s
linux (normal, gcc, vimtags)	9s
	57m 53s

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