Fix undefined type during chunk streaming (RooCodeInc#1464)

* Fix undefined type when parsing response chunk in stream

* Fix undefined type when parsing response chunk in stream

* remove Cline.ts changes

---------

Co-authored-by: 0xtoshii <[email protected]>

Author: octohedron

src/api/providers/anthropic.ts

@@ -133,7 +133,7 @@ export class AnthropicHandler implements ApiHandler {
 		}
 
 		for await (const chunk of stream) {
-			switch (chunk.type) {
+			switch (chunk?.type) {
 				case "message_start":
 					// tells us cache reads/writes/input/output
 					const usage = chunk.message.usage

src/api/providers/bedrock.ts

@@ -120,7 +120,7 @@ export class AwsBedrockHandler implements ApiHandler {
 		)
 
 		for await (const chunk of stream) {
-			switch (chunk.type) {
+			switch (chunk?.type) {
 				case "message_start":
 					const usage = chunk.message.usage
 					yield {

src/api/providers/vertex.ts

@@ -154,7 +154,7 @@ export class VertexHandler implements ApiHandler {
 		}
 
 		for await (const chunk of stream) {
-			switch (chunk.type) {
+			switch (chunk?.type) {
 				case "message_start":
 					const usage = chunk.message.usage
 					yield {