From: Enrico Forestieri <forenr@lyx.org>
Date: Thu, 12 Apr 2012 14:25:38 +0000 (+0200)
Subject: Fix bug #8105: Crash when deleting math macro from the inside
X-Git-Tag: 2.1.0beta1~1933^2~42
X-Git-Url: https://git.lyx.org/gitweb/?a=commitdiff_plain;h=d07f9eec20c8709b648a494586d4b03f75cfef47;p=lyx.git

Fix bug #8105: Crash when deleting math macro from the inside

It seems that parameterless macros are not wrapped into a MathAtom.
Rather than touching the macro code (which is tantamount to opening
a can of worms, IMHO), I prefer this solution.
---

diff --git a/src/CursorSlice.cpp b/src/CursorSlice.cpp
index c4b1c72f80..b4352e3ba4 100644
--- a/src/CursorSlice.cpp
+++ b/src/CursorSlice.cpp
@@ -23,7 +23,7 @@
 #include "insets/Inset.h"
 
 #include "mathed/InsetMath.h"
-#include "mathed/MathData.h"
+#include "mathed/MathMacro.h"
 
 #include "support/lassert.h"
 
@@ -61,8 +61,10 @@ Paragraph & CursorSlice::paragraph() const
 pos_type CursorSlice::lastpos() const
 {
 	LASSERT(inset_, /**/);
-	return inset_->asInsetMath() ? cell().size() 
-		: (text()->empty() ? 0 : paragraph().size());
+	InsetMath const * math = inset_->asInsetMath();
+	bool paramless_macro = math && math->asMacro() && !math->asMacro()->nargs();
+	return math ? (paramless_macro ? 0 : cell().size()) 
+		    : (text()->empty() ? 0 : paragraph().size());
 }