debug: improve breakpoint handling

fixes #8642

src/vs/workbench/parts/debug/common/debugModel.ts

@@ -864,12 +864,16 @@ export class Model implements IModel {
 		this._onDidChangeBreakpoints.fire();
 	}
 
-	public addBreakpoints(uri: uri, rawData: IRawBreakpoint[], adapterData: any = undefined): void {
-		this.breakpoints = this.breakpoints.concat(rawData.map(rawBp =>
-			new Breakpoint(uri, rawBp.lineNumber, rawBp.column, rawBp.enabled, rawBp.condition, rawBp.hitCondition, adapterData)));
+	public addBreakpoints(uri: uri, rawData: IRawBreakpoint[], fireEvent = true): Breakpoint[] {
+		const newBreakpoints = rawData.map(rawBp => new Breakpoint(uri, rawBp.lineNumber, rawBp.column, rawBp.enabled, rawBp.condition, rawBp.hitCondition, undefined));
+		this.breakpoints = this.breakpoints.concat(newBreakpoints);
 		this.breakpointsActivated = true;
 		this.breakpoints = distinct(this.breakpoints, bp => `${bp.uri.toString()}:${bp.lineNumber}:${bp.column}`);
-		this._onDidChangeBreakpoints.fire();
+		if (fireEvent) {
+			this._onDidChangeBreakpoints.fire();
+		}
+
+		return newBreakpoints;
 	}
 
 	public removeBreakpoints(toRemove: IBreakpoint[]): void {

src/vs/workbench/parts/debug/electron-browser/debugService.ts

@@ -373,13 +373,14 @@ export class DebugService implements debug.IDebugService {
 
 			if (event.body.reason === 'new' && event.body.breakpoint.source) {
 				const source = process.getSource(event.body.breakpoint.source);
-				this.model.addBreakpoints(source.uri, [{
+				const bps = this.model.addBreakpoints(source.uri, [{
 					column: event.body.breakpoint.column,
 					enabled: true,
-					lineNumber: event.body.breakpoint.line
-				}], source.raw.adapterData);
-				const newBreakpoint = this.model.getBreakpoints().filter(bp => bp.idFromAdapter === event.body.breakpoint.id).pop();
-				this.model.updateBreakpoints({ [newBreakpoint.getId()]: event.body.breakpoint });
+					lineNumber: event.body.breakpoint.line,
+				}], false);
+				if (bps.length === 1) {
+					this.model.updateBreakpoints({ [bps[0].getId()]: event.body.breakpoint });
+				}
 			}
 
 			if (event.body.reason === 'removed') {