Fixed crash when sublist is nil.

2023-02-27 08:28:57 -05:00
parent 46485d8790
commit d05123066c
1 changed files with 10 additions and 9 deletions
--- a/Sources/SwiftMath/MathRender/MTMathListBuilder.swift
+++ b/Sources/SwiftMath/MathRender/MTMathListBuilder.swift
@@ -260,15 +260,16 @@ public struct MTMathListBuilder {
                    spacesAllowed = command == "text"
                    let oldFontStyle = currentFontStyle
                    currentFontStyle = fontStyle
-                    let sublist = self.buildInternal(true)!
-                    // Restore the font style.
-                    currentFontStyle = oldFontStyle
-                    spacesAllowed = oldSpacesAllowed
-
-                    prevAtom = sublist.atoms.last
-                    list.append(sublist)
-                    if oneCharOnly {
-                        return list
+                    if let sublist = self.buildInternal(true) {
+                        // Restore the font style.
+                        currentFontStyle = oldFontStyle
+                        spacesAllowed = oldSpacesAllowed
+                        
+                        prevAtom = sublist.atoms.last
+                        list.append(sublist)
+                        if oneCharOnly {
+                            return list
+                        }
                    }
                    continue
                }