[LyX/2.3.x] Do not load mathrsfs if unicode-math is required (#12734)

[Juergen Spitzmueller]

commit f5457342c439b20e84fa43f2aedea87762fb80b8
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Sat Apr 15 12:35:22 2023 +0200

    Do not load mathrsfs if unicode-math is required (#12734)
    
    The latter provides \mathscr and the packages clash
    
    (cherry picked from commit a15bc829d10e73fd89d2d4baacb63bd34fc9d966)
---
 src/mathed/InsetMathFont.cpp |    2 +-
 status.23x                   |    2 ++
 2 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/src/mathed/InsetMathFont.cpp b/src/mathed/InsetMathFont.cpp
index 6611590..c918d32 100644
--- a/src/mathed/InsetMathFont.cpp
+++ b/src/mathed/InsetMathFont.cpp
@@ -128,7 +128,7 @@ void InsetMathFont::validate(LaTeXFeatures & features) const
 		if (fontname == "text" || fontname == "textnormal"
 		    || (fontname.length() == 6 && fontname.substr(0, 4) == "text"))
 			features.require("amstext");
-		if (fontname == "mathscr")
+		if (fontname == "mathscr" && !features.isRequired("unicode-math"))
 			features.require("mathrsfs");
 		if (fontname == "textipa")
 			features.require("tipa");
diff --git a/status.23x b/status.23x
index f28c289..461cef0 100644
--- a/status.23x
+++ b/status.23x
@@ -43,6 +43,8 @@ What's new
 
 - Fix leaking of linespace settings between paragraphs if they have
   different aligment (bug 12638).
+  
+- Do not load mathrsfs if unicode-math is required (bug 12734).
 
 
 * USER INTERFACE