dev: Improve template debugging in development

lib/builder/builder.js

@@ -335,23 +335,28 @@ export default class Builder extends Tapable {
       this.options.build.watch.push(src)
       // Render template to dst
       const fileContent = await readFile(src, 'utf8')
-      const template = _.template(fileContent, {
+      let content
-        imports: {
+      try {
-          serialize,
+        const template = _.template(fileContent, {
-          hash,
+          imports: {
-          r,
+            serialize,
-          wp,
+            hash,
-          wChunk,
+            r,
-          resolvePath: this.nuxt.resolvePath.bind(this.nuxt),
+            wp,
-          relativeToBuild: this.relativeToBuild
+            wChunk,
-        }
+            resolvePath: this.nuxt.resolvePath.bind(this.nuxt),
-      })
+            relativeToBuild: this.relativeToBuild
-      const content = template(Object.assign({}, templateVars, {
+          }
-        options: options || {},
+        })
-        custom,
+        content = template(Object.assign({}, templateVars, {
-        src,
+          options: options || {},
-        dst
+          custom,
-      }))
+          src,
+          dst
+        }))
+      } catch (err) {
+        throw new Error(`Could not compile template ${src}: ${err.message}`)
+      }
       const path = r(this.options.buildDir, dst)
       // Ensure parent dir exits
       await mkdirp(dirname(path))