Function calls are not supported on conditional breakpoints

1. What version of Delve are you using (dlv version)? Delve Debugger Version: 1.3.2 Build: 3c266810757cd4abafe46fc6c9203aeeef5e15bf

2. What version of Go are you using? (go version)? Go 1.13.4

3. What operating system and processor architecture are you using? windows/amd64

4. What did you do? Run the following app in debug mode:

package main

import (
	"fmt"
	"runtime"
)

func factorial(n int, withBreak bool) int {
	if withBreak {
		runtime.Breakpoint()
	}

	if n == 0 {
		return 1
	} else {
		return n * factorial(n-1, withBreak)
	}
}

func main() {
	factorial(10, false)
	fmt.Println("the end")
}

Then run the following commands in delve:

b main.go:16
cond 1 factorial(n, false) == 6
c

1. What did you expect to see? I'd expect the execution to stop at the breakpoint when the condition is met.

2. What did you see instead?

Command failed: error evaluating expression: function calls not allowed without using 'call'