patch 9.0.0350: :echowindow does not work in a compiled function
Problem: :echowindow does not work in a compiled function.
Solution: Handle the expression at compile time.
diff --git a/src/vim9.h b/src/vim9.h
index 3ab1c5a..b32dbea 100644
--- a/src/vim9.h
+++ b/src/vim9.h
@@ -25,6 +25,7 @@
ISN_EXECUTE, // :execute with isn_arg.number items on top of stack
ISN_ECHOMSG, // :echomsg with isn_arg.number items on top of stack
ISN_ECHOCONSOLE, // :echoconsole with isn_arg.number items on top of stack
+ ISN_ECHOWINDOW, // :echowindow with isn_arg.number items on top of stack
ISN_ECHOERR, // :echoerr with isn_arg.number items on top of stack
ISN_RANGE, // compute range from isn_arg.string, push to stack
ISN_SUBSTITUTE, // :s command with expression