Fix illegal connections in stacks after a healing delete (issue 15).

blockly_compressed.js

@@ -1013,7 +1013,7 @@ Blockly.BUMP_DELAY,a);Blockly.fireUiEvent(window,"resize")}a&&a.workspace.fireCh
 Blockly.Block.prototype.unselect=function(){goog.asserts.assertObject(this.svg_,"Block is not rendered.");Blockly.selected=null;this.svg_.removeSelect();Blockly.fireUiEvent(this.workspace.getCanvas(),"blocklySelectChange")};
 Blockly.Block.prototype.dispose=function(a,b,c){this.rendered=!1;this.unplug(a,!1);b&&this.svg_&&this.svg_.disposeUiEffect();this.workspace&&!c&&(this.workspace.removeTopBlock(this),this.workspace=null);Blockly.selected==this&&(Blockly.selected=null,Blockly.terminateDrag_());Blockly.ContextMenu.currentBlock==this&&Blockly.ContextMenu.hide();for(a=this.childBlocks_.length-1;0<=a;a--)this.childBlocks_[a].dispose(!1);b=this.getIcons();for(a=0;a<b.length;a++)b[a].dispose();for(a=0;b=this.inputList[a];a++)b.dispose();
 this.inputList=[];b=this.getConnections_(!0);for(a=0;a<b.length;a++)c=b[a],c.targetConnection&&c.disconnect(),b[a].dispose();this.svg_&&(this.svg_.dispose(),this.svg_=null);Blockly.Realtime.isEnabled()&&!Blockly.Realtime.withinSync&&Blockly.Realtime.removeBlock(this)};
-Blockly.Block.prototype.unplug=function(a,b){b=b&&!!this.getParent();if(this.outputConnection)this.outputConnection.targetConnection&&this.setParent(null);else{var c=null;this.previousConnection&&this.previousConnection.targetConnection&&(c=this.previousConnection.targetConnection,this.setParent(null));var d=this.getNextBlock();if(a&&d){var e=this.nextConnection.targetConnection;d.setParent(null);c&&c.connect(e)}}b&&this.moveBy(Blockly.SNAP_RADIUS*(Blockly.RTL?-1:1),2*Blockly.SNAP_RADIUS)};
+Blockly.Block.prototype.unplug=function(a,b){b=b&&!!this.getParent();if(this.outputConnection)this.outputConnection.targetConnection&&this.setParent(null);else{var c=null;this.previousConnection&&this.previousConnection.targetConnection&&(c=this.previousConnection.targetConnection,this.setParent(null));var d=this.getNextBlock();if(a&&d){var e=this.nextConnection.targetConnection;d.setParent(null);c&&c.checkType_(e)&&c.connect(e)}}b&&this.moveBy(Blockly.SNAP_RADIUS*(Blockly.RTL?-1:1),2*Blockly.SNAP_RADIUS)};
 Blockly.Block.prototype.getRelativeToSurfaceXY=function(){var a=0,b=0;if(this.svg_){var c=this.svg_.getRootElement();do var d=Blockly.getRelativeXY_(c),a=a+d.x,b=b+d.y,c=c.parentNode;while(c&&c!=this.workspace.getCanvas())}return{x:a,y:b}};Blockly.Block.prototype.moveBy=function(a,b){var c=this.getRelativeToSurfaceXY();this.svg_.getRootElement().setAttribute("transform","translate("+(c.x+a)+", "+(c.y+b)+")");this.moveConnections_(a,b);Blockly.Realtime.blockChanged(this)};
 Blockly.Block.prototype.getHeightWidth=function(){var a=this.svg_.height,b=this.svg_.width,c=this.getNextBlock();c&&(c=c.getHeightWidth(),a+=c.height-4,b=Math.max(b,c.width));return{height:a,width:b}};
 Blockly.Block.prototype.onMouseDown_=function(a){if(!this.isInFlyout){Blockly.svgResize();Blockly.terminateDrag_();this.select();Blockly.hideChaff();if(Blockly.isRightButton(a))this.showContextMenu_(a);else if(this.isMovable()){Blockly.removeAllRanges();Blockly.setCursorHand_(!0);var b=this.getRelativeToSurfaceXY();this.startDragX=b.x;this.startDragY=b.y;this.startDragMouseX=a.clientX;this.startDragMouseY=a.clientY;Blockly.Block.dragMode_=1;Blockly.Block.onMouseUpWrapper_=Blockly.bindEvent_(document,

core/block.js

@@ -427,7 +427,7 @@ Blockly.Block.prototype.unplug = function(healStack, bump) {
       // Disconnect the next statement.
       var nextTarget = this.nextConnection.targetConnection;
       nextBlock.setParent(null);
-      if (previousTarget) {
+      if (previousTarget && previousTarget.checkType_(nextTarget)) {
         // Attach the next statement to the previous statement.
         previousTarget.connect(nextTarget);
       }