Delete monitor block when variable is deleted

src/engine/blocks.js

@@ -250,9 +250,7 @@ class Blocks {
             if (optRuntime && this._blocks[e.blockId].topLevel) {
                 optRuntime.quietGlow(e.blockId);
             }
-            this.deleteBlock({
-                id: e.blockId
-            });
+            this.deleteBlock(e.blockId);
             break;
         case 'var_create':
             // New variables being created by the user are all global.
@@ -414,37 +412,37 @@ class Blocks {
 
     /**
      * Block management: delete blocks and their associated scripts.
-     * @param {!object} e Blockly delete event to be processed.
+     * @param {!string} blockId Id of block to delete
      */
-    deleteBlock (e) {
+    deleteBlock (blockId) {
         // @todo In runtime, stop threads running on this script.
 
         // Get block
-        const block = this._blocks[e.id];
+        const block = this._blocks[blockId];
 
         // Delete children
         if (block.next !== null) {
-            this.deleteBlock({id: block.next});
+            this.deleteBlock(block.next);
         }
 
         // Delete inputs (including branches)
         for (const input in block.inputs) {
             // If it's null, the block in this input moved away.
             if (block.inputs[input].block !== null) {
-                this.deleteBlock({id: block.inputs[input].block});
+                this.deleteBlock(block.inputs[input].block);
             }
             // Delete obscured shadow blocks.
             if (block.inputs[input].shadow !== null &&
                 block.inputs[input].shadow !== block.inputs[input].block) {
-                this.deleteBlock({id: block.inputs[input].shadow});
+                this.deleteBlock(block.inputs[input].shadow);
             }
         }
 
         // Delete any script starting with this block.
-        this._deleteScript(e.id);
+        this._deleteScript(blockId);
 
         // Delete block itself.
-        delete this._blocks[e.id];
+        delete this._blocks[blockId];
     }
 
     // ---------------------------------------------------------------------

src/engine/target.js

@@ -189,6 +189,7 @@ class Target extends EventEmitter {
         if (this.variables.hasOwnProperty(id)) {
             delete this.variables[id];
             if (this.runtime) {
+                this.runtime.monitorBlocks.deleteBlock(id);
                 this.runtime.requestRemoveMonitor(id);
             }
         }

test/unit/engine_blocks.js

@@ -421,9 +421,7 @@ test('delete', t => {
         inputs: {},
         topLevel: true
     });
-    b.deleteBlock({
-        id: 'foo'
-    });
+    b.deleteBlock('foo');
 
     t.type(b._blocks.foo, 'undefined');
     t.equal(b._scripts.indexOf('foo'), -1);
@@ -458,9 +456,7 @@ test('delete chain', t => {
         inputs: {},
         topLevel: false
     });
-    b.deleteBlock({
-        id: 'foo'
-    });
+    b.deleteBlock('foo');
     t.type(b._blocks.foo, 'undefined');
     t.type(b._blocks.foo2, 'undefined');
     t.type(b._blocks.foo3, 'undefined');
@@ -531,9 +527,7 @@ test('delete inputs', t => {
         inputs: {},
         topLevel: false
     });
-    b.deleteBlock({
-        id: 'foo'
-    });
+    b.deleteBlock('foo');
     t.type(b._blocks.foo, 'undefined');
     t.type(b._blocks.foo2, 'undefined');
     t.type(b._blocks.foo3, 'undefined');