Problem: cannot change buffer in a popup #698

Job	Run time
macos (tiny, macos-12)	1m 33s
linux (tiny, clang, native)	2m 22s
macos (tiny, macos-14)	53s
windows (HUGE, msvc, no, no, x64, stable)	5m 56s
macos (normal, macos-12)	7m 37s
macos (normal, macos-14)	4m 46s
windows (HUGE, mingw, yes, yes, x86, stable, yes)	10m 38s
linux (tiny, gcc, native)	2m 19s
macos (huge, macos-12)	15m 0s
linux (normal, clang, native)	5m 20s
windows (HUGE, msvc, no, yes, x86)	8m 45s
macos (huge, macos-14)	13m 18s
linux (normal, gcc, native)	5m 12s
windows (HUGE, mingw, yes, no, x64, yes)	10m 15s
windows (NORMAL, msvc, yes, no, x86)	5m 37s
linux (huge, clang, native)	8m 57s
windows (NORMAL, mingw, no, yes, x64)	8m 47s
linux (huge, gcc, native)	11m 38s
windows (TINY, msvc, yes, yes, x64)	1m 55s
linux (tiny, clang, nogui)	1m 48s
windows (TINY, mingw, no, no, x86)	2m 24s
linux (tiny, gcc, nogui)	2m 15s
linux (normal, gcc, i386, ./src/shadow)	6m 8s
linux (huge, gcc, uchar, testgui, true, dynamic)	10m 40s
linux (huge, clang, asan, 5.1)	16m 17s
linux (huge, gcc, unittests, true)	3m 33s
linux (normal, gcc, vimtags)	2m 24s
	2h 56m 17s

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