patch 8.0.1309: cannot use 'balloonexpr' in a terminal commit https://github.com/vim/vim/commit/51b0f3701ecb440aa72ab6017c1df6940c0e0f6f Author: Bram Moolenaar <Bram@vim.org> Date: Sat Nov 18 18:52:04 2017 +0100 patch 8.0.1309: cannot use 'balloonexpr' in a terminal Problem: Cannot use 'balloonexpr' in a terminal. Solution: Add 'balloonevalterm' and add code to handle mouse movements in a terminal. Initial implementation for Unix with GUI.

--- a/src/feature.h
+++ b/src/feature.h
@@ -1328,6 +1328,13 @@
 # define FEAT_BEVAL_TIP		/* balloon eval used for toolbar tooltip */
 #endif
 
+/*
+ * +balloon_eval_term	Allow balloon expression evaluation in the terminal.
+ */
+#if defined(FEAT_BEVAL) && defined(UNIX) && defined(FEAT_TIMERS)
+# define FEAT_BEVALTERM
+#endif
+
 /* both Motif and Athena are X11 and share some code */
 #if defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA)
 # define FEAT_GUI_X11