From 781633fb1ad02cb8ac7f36bf0e9af4a56a49c4e5 Mon Sep 17 00:00:00 2001
From: Kyle Kelley <rgbkrk@gmail.com>
Date: Sat, 20 Jul 2024 15:59:28 -0700
Subject: [PATCH] repl: Ensure that the output's computed line height is at
 least 1 (#14877)

---
 crates/repl/src/outputs.rs | 3 ++-
 crates/repl/src/stdio.rs   | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/crates/repl/src/outputs.rs b/crates/repl/src/outputs.rs
index 17dc8b0180..2d61fd9864 100644
--- a/crates/repl/src/outputs.rs
+++ b/crates/repl/src/outputs.rs
@@ -553,9 +553,10 @@ impl LineHeight for ExecutionView {
         self.outputs
             .iter()
             .map(|output| output.num_lines(cx))
-            .fold(0, |acc, additional_height| {
+            .fold(0_u8, |acc, additional_height| {
                 acc.saturating_add(additional_height)
             })
+            .max(1)
     }
 }
 
diff --git a/crates/repl/src/stdio.rs b/crates/repl/src/stdio.rs
index 38a154e289..1500c8bc5f 100644
--- a/crates/repl/src/stdio.rs
+++ b/crates/repl/src/stdio.rs
@@ -88,7 +88,7 @@ impl TerminalOutput {
 
 impl LineHeight for TerminalOutput {
     fn num_lines(&self, _cx: &mut WindowContext) -> u8 {
-        self.handler.buffer.lines().count() as u8
+        self.handler.buffer.lines().count().max(1) as u8
     }
 }