Ignore the rest of the line after else (bug #3006)

CHANGELOG.md

@@ -3,6 +3,7 @@
 
     Bug #2969: Scripted items can stack
     Bug #2987: Editor: some chance and AI data fields can overflow
+    Bug #3006: 'else if' operator breaks script compilation
     Bug #3282: Unintended behaviour when assigning F3 and Windows keys
     Bug #3623: Fix HiDPI on Windows
     Bug #3733: Normal maps are inverted on mirrored UVs

components/compiler/controlparser.cpp

@@ -179,6 +179,14 @@ namespace Compiler
             scanner.scan (mLineParser);
             return true;
         }
+        else if (mState==IfElseJunkState)
+        {
+            getErrorHandler().warning ("Ignoring extra text after else", loc);
+            SkipParser skip (getErrorHandler(), getContext());
+            scanner.scan (skip);
+            mState = IfElseBodyState;
+            return true;
+        }
 
         return Parser::parseName (name, loc, scanner);
     }
@@ -207,8 +215,7 @@ namespace Compiler
                 return true;
             }
         }
-        else if (mState==IfBodyState || mState==IfElseifBodyState || mState==IfElseBodyState ||
-            mState==IfElseJunkState)
+        else if (mState==IfBodyState || mState==IfElseifBodyState || mState==IfElseBodyState)
         {
             if (parseIfBody (keyword, loc, scanner))
                 return true;
@@ -218,6 +225,14 @@ namespace Compiler
             if ( parseWhileBody (keyword, loc, scanner))
                 return true;
         }
+        else if (mState==IfElseJunkState)
+        {
+            getErrorHandler().warning ("Ignoring extra text after else", loc);
+            SkipParser skip (getErrorHandler(), getContext());
+            scanner.scan (skip);
+            mState = IfElseBodyState;
+            return true;
+        }
 
         return Parser::parseKeyword (keyword, loc, scanner);
     }
@@ -250,8 +265,9 @@ namespace Compiler
                 default: ;
             }
         }
-        else if (code==Scanner::S_open && mState==IfElseJunkState)
+        else if (mState==IfElseJunkState)
         {
+            getErrorHandler().warning ("Ignoring extra text after else", loc);
             SkipParser skip (getErrorHandler(), getContext());
             scanner.scan (skip);
             mState = IfElseBodyState;