[FIX] component: propagate errors to caller

Errors from mounted/willPatch/patched should be returned to caller
(either mount or render functions)

part of #410

src/component/component.ts

@@ -444,13 +444,9 @@ export class Component<T extends Env, Props extends {}> {
     }
     __owl__.isMounted = true;
     __owl__.currentFiber = null;
-    try {
-      this.mounted();
-      if (__owl__.mountedCB) {
-        __owl__.mountedCB();
-      }
-    } catch (e) {
-      console.error(e); // TODO : add a test
+    this.mounted();
+    if (__owl__.mountedCB) {
+      __owl__.mountedCB();
     }
   }
 

src/component/fiber.ts

@@ -196,16 +196,12 @@ export class Fiber {
     this._walk(doWork);
     let component: Component<any, any> = this.component;
     const patchLen = patchQueue.length;
-    try {
-      for (let i = 0; i < patchLen; i++) {
-        component = patchQueue[i].component;
-        if (component.__owl__.willPatchCB) {
-          component.__owl__.willPatchCB();
-        }
-        component.willPatch();
+    for (let i = 0; i < patchLen; i++) {
+      component = patchQueue[i].component;
+      if (component.__owl__.willPatchCB) {
+        component.__owl__.willPatchCB();
       }
-    } catch (e) {
-      console.error(e);
+      component.willPatch();
     }
     for (let i = 0; i < patchLen; i++) {
       const fiber = patchQueue[i];
@@ -213,16 +209,12 @@ export class Fiber {
       component.__patch(fiber.vnode);
       component.__owl__.currentFiber = null;
     }
-    try {
-      for (let i = patchLen - 1; i >= 0; i--) {
-        component = patchQueue[i].component;
-        component.patched();
-        if (component.__owl__.patchedCB) {
-          component.__owl__.patchedCB();
-        }
+    for (let i = patchLen - 1; i >= 0; i--) {
+      component = patchQueue[i].component;
+      component.patched();
+      if (component.__owl__.patchedCB) {
+        component.__owl__.patchedCB();
       }
-    } catch (e) {
-      console.error(e);
     }
   }
 

src/component/scheduler.ts

@@ -59,7 +59,11 @@ export class Scheduler {
       }
       if (task.fiber.counter === 0) {
         if (!task.fiber.error) {
-          task.fiber.complete();
+          try {
+            task.fiber.complete();
+          } catch (e) {
+            task.fiber.handleError(e);
+          }
         }
         task.callback();
         return false;

src/qweb/expression_parser.ts

@@ -164,7 +164,7 @@ const TOKENIZERS = [
   tokenizeNumber,
   tokenizeOperator,
   tokenizeSymbol,
-  tokenizeStatic,
+  tokenizeStatic
 ];
 
 /**