[LyX/master] Avoid loop in math parsing function

[Juergen Spitzmueller]

commit 003bbd3483c9697a3d5105b26cb43a95ef20a0e8
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Thu Jul 25 09:18:01 2024 +0200

    Avoid loop in math parsing function
---
 src/Encoding.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Encoding.cpp b/src/Encoding.cpp
index 675834f63f..33ae59045c 100644
--- a/src/Encoding.cpp
+++ b/src/Encoding.cpp
@@ -663,7 +663,13 @@ docstring Encodings::convertLaTeXCommands(docstring const 
& str, bool const for_
                                        if (cmd.empty())
                                                break;
                                        // go on ...
+                                       docstring oldrem = rem;
                                        ret += 
fromLaTeXCommand(from_ascii("\\") + cmd, MATH_CMD, termination, rem);
+                                       if (oldrem == rem) {
+                                               // Result unchanged, output
+                                               ret += rem;
+                                               break;
+                                       }
                                }
                                mret = docstring();
                        }
-- 
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