diff --git a/src/vs/editor/contrib/hover/browser/modesContentHover.ts b/src/vs/editor/contrib/hover/browser/modesContentHover.ts
index ee34fbc1c66..e0476023296 100644
--- a/src/vs/editor/contrib/hover/browser/modesContentHover.ts
+++ b/src/vs/editor/contrib/hover/browser/modesContentHover.ts
@@ -7,6 +7,7 @@
 import 'vs/css!vs/base/browser/ui/progressbar/progressbar';
 import * as nls from 'vs/nls';
 import URI from 'vs/base/common/uri';
+import {onUnexpectedError} from 'vs/base/common/errors';
 import {$} from 'vs/base/browser/dom';
 import {TPromise} from 'vs/base/common/winjs.base';
 import {renderMarkedString} from 'vs/base/browser/htmlContentRenderer';
@@ -244,7 +245,7 @@ export class ModesContentHoverWidget extends ContentHoverWidget {
 				.forEach(contents => {
 					const renderedContents = renderMarkedString(contents, {
 						actionCallback: (content) => {
-							this._openerService.open(URI.parse(content));
+							this._openerService.open(URI.parse(content)).then(void 0, onUnexpectedError);
 						},
 						codeBlockRenderer: (modeId, value): string | TPromise<string> => {
 							const mode = this._modeService.getMode(modeId || this._editor.getModel().getModeId());
diff --git a/src/vs/editor/contrib/hover/browser/modesGlyphHover.ts b/src/vs/editor/contrib/hover/browser/modesGlyphHover.ts
index 44e4ab30fd1..0e5d5818e9d 100644
--- a/src/vs/editor/contrib/hover/browser/modesGlyphHover.ts
+++ b/src/vs/editor/contrib/hover/browser/modesGlyphHover.ts
@@ -12,6 +12,7 @@ import {$} from 'vs/base/browser/dom';
 import {renderMarkedString} from 'vs/base/browser/htmlContentRenderer';
 import {IOpenerService, NullOpenerService} from 'vs/platform/opener/common/opener';
 import URI from 'vs/base/common/uri';
+import {onUnexpectedError} from 'vs/base/common/errors';
 import {TPromise} from 'vs/base/common/winjs.base';
 import {IModeService} from 'vs/editor/common/services/modeService';
 import {tokenizeToString} from 'vs/editor/common/modes/textToHtmlTokenizer';
@@ -154,7 +155,7 @@ export class ModesGlyphHoverWidget extends GlyphHoverWidget {
 
 		messages.forEach((msg) => {
 			const renderedContents = renderMarkedString(msg.value, {
-				actionCallback: content => this.openerService.open(URI.parse(content)),
+				actionCallback: content => this.openerService.open(URI.parse(content)).then(undefined, onUnexpectedError),
 				codeBlockRenderer: (modeId, value): string | TPromise<string> => {
 					const mode = this.modeService.getMode(modeId || this._editor.getModel().getModeId());
 					const getMode = mode => mode ? TPromise.as(mode) : this.modeService.getOrCreateMode(modeId);
diff --git a/src/vs/platform/opener/browser/openerService.ts b/src/vs/platform/opener/browser/openerService.ts
index 8fccde38545..7d08710899c 100644
--- a/src/vs/platform/opener/browser/openerService.ts
+++ b/src/vs/platform/opener/browser/openerService.ts
@@ -68,6 +68,6 @@ export class OpenerService implements IOpenerService {
 			});
 		}
 
-		return TPromise.as(promise).then(undefined, err => { }); // !ignores all errors
+		return TPromise.as(promise);
 	}
 }