diff -u gparted-0.1/debian/changelog gparted-0.1/debian/changelog
--- gparted-0.1/debian/changelog
+++ gparted-0.1/debian/changelog
@@ -1,3 +1,12 @@
+gparted (0.1-0ubuntu9) UNRELEASED; urgency=low
+
+  * debian/patches/safe-apply-operations.patch: If an operation fails to
+    apply, cancel immediately rather than blundering on and potentially
+    letting later actions in the operations list damage existing filesystems
+    (closes: Malone #46961).
+
+ -- Colin Watson <cjwatson@ubuntu.com>  Tue, 30 May 2006 12:21:29 +0100
+
 gparted (0.1-0ubuntu8) dapper; urgency=low
 
   * debian/patches/installer-mode.patch: Only emit "- FORMAT" instructions
only in patch2:
unchanged:
--- gparted-0.1.orig/debian/patches/safe-apply-operations.patch
+++ gparted-0.1/debian/patches/safe-apply-operations.patch
@@ -0,0 +1,100 @@
+diff -Nur gparted-0.1/include/GParted_Core.h gparted-0.1.new/include/GParted_Core.h
+--- gparted-0.1/include/GParted_Core.h	2006-05-30 12:47:00.000000000 +0100
++++ gparted-0.1.new/include/GParted_Core.h	2006-05-30 12:47:02.000000000 +0100
+@@ -47,7 +47,7 @@
+ 	
+ 	int get_estimated_time( const Operation & operation ) ;
+ 
+-	void Apply_Operation_To_Disk( Operation & operation );
++	bool Apply_Operation_To_Disk( Operation & operation );
+ 	
+ 	bool Create( const Device & device, Partition & new_partition ) ;
+ 	bool format( const Partition & partition ) ;
+diff -Nur gparted-0.1/src/GParted_Core.cc gparted-0.1.new/src/GParted_Core.cc
+--- gparted-0.1/src/GParted_Core.cc	2006-05-30 12:47:00.000000000 +0100
++++ gparted-0.1.new/src/GParted_Core.cc	2006-05-30 12:47:02.000000000 +0100
+@@ -507,34 +507,46 @@
+ 	return -1 ; //pulsing
+ }
+ 
+-void GParted_Core::Apply_Operation_To_Disk( Operation & operation )
++bool GParted_Core::Apply_Operation_To_Disk( Operation & operation )
+ {
+ 	switch ( operation .operationtype )
+ 	{
+ 		case DELETE:
+-			if ( ! Delete( operation .partition_original ) ) 
++			if ( ! Delete( operation .partition_original ) ) {
+ 				Show_Error( String::ucompose( _("Error while deleting %1"), operation .partition_original .partition ) ) ;
++				return false;
++			}
+ 														
+ 			break;
+ 		case CREATE:
+-			if ( ! Create( operation .device, operation .partition_new ) ) 
++			if ( ! Create( operation .device, operation .partition_new ) ) {
+ 				Show_Error( String::ucompose( _("Error while creating %1"), operation .partition_new .partition ) );
++				return false;
++			}
+ 											
+ 			break;
+ 		case RESIZE_MOVE:
+-			if ( ! Resize( operation .device, operation .partition_original, operation .partition_new ) )
++			if ( ! Resize( operation .device, operation .partition_original, operation .partition_new ) ) {
+ 				Show_Error( String::ucompose( _("Error while resizing/moving %1"), operation .partition_new .partition ) ) ;
++				return false;
++			}
+ 											
+ 			break;
+ 		case FORMAT:
+-			if ( ! format( operation .partition_new ) ) 
++			if ( ! format( operation .partition_new ) ) {
+ 				Show_Error( String::ucompose( _("Error while formattting filesystem of %1"), operation .partition_new .partition ) ) ;
++				return false;
++			}
+ 										
+ 			break;
+ 		case COPY:
+-			if ( ! Copy( operation .copied_partition_path, operation .partition_new ) ) 
++			if ( ! Copy( operation .copied_partition_path, operation .partition_new ) ) {
+ 				Show_Error( String::ucompose( _("Error while copying %1"), operation .partition_new .partition ) ) ;
++				return false;
++			}
+ 	}
++
++	return true;
+ }
+ 
+ bool GParted_Core::Create( const Device & device, Partition & new_partition ) 
+diff -Nur gparted-0.1/src/Win_GParted.cc gparted-0.1.new/src/Win_GParted.cc
+--- gparted-0.1/src/Win_GParted.cc	2006-05-30 12:47:00.000000000 +0100
++++ gparted-0.1.new/src/Win_GParted.cc	2006-05-30 12:47:38.000000000 +0100
+@@ -1489,7 +1489,7 @@
+ 		//reread devices and their layouts...
+ 		menu_gparted_refresh_devices( ) ;
+ 
+-		return true;
++		return apply;
+ 	}
+ 	else
+ 		return false;
+@@ -1502,13 +1502,15 @@
+ 
+ void Win_GParted::apply_operations_thread( )
+ { 
+-	for ( unsigned int t = 0 ; t < operations .size( ) && apply ; t++ )
++	for ( unsigned int t = 0 ; t < operations .size( ) ; t++ )
+ 	{ 			
+-		dialog_progress ->Set_Current( operations[ t ] .str_operation,
+-					       gparted_core .get_estimated_time( operations[ t ] ) );
++		if ( apply )
++			dialog_progress ->Set_Current( operations[ t ] .str_operation,
++						       gparted_core .get_estimated_time( operations[ t ] ) );
+ 		dispatcher( ) ;
+ 		
+-		gparted_core .Apply_Operation_To_Disk( operations[ t ] );
++		if ( apply && ! gparted_core .Apply_Operation_To_Disk( operations[ t ] ) )
++			apply = false ;
+ 	}
+ 	dispatcher( );
+ }