From 33013af37ac2e28c194d569f44e31574ed54f1c4 Mon Sep 17 00:00:00 2001
From: Laurenz <laurmaedje@gmail.com>
Date: Fri, 27 Jan 2023 19:27:32 +0100
Subject: [PATCH] Error message when font doesn't support math

---
 library/src/math/mod.rs | 3 +++
 src/model/eval.rs       | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/library/src/math/mod.rs b/library/src/math/mod.rs
index 2cc8fa9e..1d94661a 100644
--- a/library/src/math/mod.rs
+++ b/library/src/math/mod.rs
@@ -198,6 +198,9 @@ impl Layout for FormulaNode {
                 Some(font)
             })
         else {
+            if let Some(span) = self.body.span() {
+                bail!(span, "current font does not support math");
+            }
             return Ok(Fragment::frame(Frame::new(Size::zero())))
         };
 
diff --git a/src/model/eval.rs b/src/model/eval.rs
index 3e1ccfa6..538fa687 100644
--- a/src/model/eval.rs
+++ b/src/model/eval.rs
@@ -553,7 +553,8 @@ impl Eval for ast::Math {
             self.exprs()
                 .map(|expr| Ok(expr.eval(vm)?.display_in_math()))
                 .collect::<SourceResult<_>>()?,
-        ))
+        )
+        .spanned(self.span()))
     }
 }