From c86752e39dd015aa66c741be3e2312c6f0e69ef1 Mon Sep 17 00:00:00 2001
From: Daniel Schadt <kingdread@gmx.de>
Date: Tue, 10 Dec 2019 14:48:54 +0100
Subject: avoid crashing with empty build templates

This would occur if e.g. only the profession was given.
---
 src/render.rs | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/render.rs')

diff --git a/src/render.rs b/src/render.rs
index bb38399..90eff14 100644
--- a/src/render.rs
+++ b/src/render.rs
@@ -19,6 +19,9 @@ quick_error! {
             cause(err)
             from()
         }
+        EmptyBuild {
+            description("The build template contains nothing worth rendering")
+        }
     }
 }
 
@@ -284,6 +287,9 @@ impl<'r> Renderer<'r> {
         build: &BuildTemplate,
     ) -> Result<RgbaImage, RenderError> {
         let images = self.construct_parts(build)?;
+        if images.is_empty() {
+            return Err(RenderError::EmptyBuild);
+        }
         self.merge_parts(&images)
     }
 
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