Task part of #44745.

src/vs/workbench/parts/tasks/common/problemMatcher.ts

@@ -1068,7 +1068,7 @@ class ProblemPatternRegistryImpl implements IProblemPatternRegistry {
 				}
 				resolve(undefined);
 			});
-		});
+		}, () => { });
 	}
 
 	public onReady(): TPromise<void> {
@@ -1611,7 +1611,7 @@ class ProblemMatcherRegistryImpl implements IProblemMatcherRegistry {
 				}
 				resolve(undefined);
 			});
-		});
+		}, () => { });
 	}
 
 	public onReady(): TPromise<void> {

src/vs/workbench/parts/tasks/common/taskDefinitionRegistry.ts

@@ -105,7 +105,7 @@ class TaskDefinitionRegistryImpl implements ITaskDefinitionRegistry {
 				}
 				resolve(undefined);
 			});
-		});
+		}, () => { });
 	}
 
 	public onReady(): TPromise<void> {