From ef9c115245663a0ba8cc6aae428511fe98233062 Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom.smeding@gmail.com>
Date: Mon, 6 Apr 2020 23:13:52 +0200
Subject: Fix behaviour for commands on too-empty stack with non-empty buffer

---
 src/main.rs | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 3b8547f..42b9460 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -200,6 +200,10 @@ fn handle_key(key: Key, st: &mut State<'_>) -> Option<bool> {
                 if st.input_buffer.len() != 0 {
                     match st.input_buffer.parse::<Entry>() {
                         Ok(val) => {
+                            if st.stk.len() + 1 < nargs {
+                                return None;
+                            }
+
                             st.stk.push(val);
                             print!("{}\r{}{}",
                                    termion::clear::CurrentLine,
@@ -215,12 +219,13 @@ fn handle_key(key: Key, st: &mut State<'_>) -> Option<bool> {
                         Err(_) => return None,
                     }
                 } else {
+                    if st.stk.len() < nargs {
+                        return None;
+                    }
+
                     delay_lf = 0;
                 }
 
-                if st.stk.len() < nargs {
-                    return None;
-                }
                 let prevlen = st.stk.len();
                 let npushed = f(&mut st.stk);
                 let sizeincr = st.stk.len() as isize - prevlen as isize;
-- 
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