[BUG] 子任务返回主任务时报错

[c-sunc6]

Problem (one or two sentences)

子任务返回主任务时报错

Context (who is affected and when)

子任务返回主任务时报错

Reproduction steps

子任务返回主任务时报错

Expected result

子任务返回主任务时报错

Actual result

子任务返回主任务时报错

Variations tried (optional)

子任务返回主任务时报错

App Version

v3.51.0

API Provider (optional)

None

Model Used (optional)

No response

Roo Code Task Links (optional)

No response

Relevant logs or errors (optional)

出现了错误 (v3.51.0)
请通过在以下位置报告此错误来帮助我们改进 我们的 GitHub Issues 页面

复制并粘贴以下错误信息，将其作为提交内容的一部分：

错误堆栈：
TypeError: n.replace is not a function
    at countMarkdownHeadings (../../../../webview-ui/src/utils/markdown.ts:10:32)
    at hasComplexMarkdown (../../../../webview-ui/src/utils/markdown.ts:22:8)
    at hasComplexMarkdown (../../../../webview-ui/src/components/chat/OpenMarkdownPreviewButton.tsx:14:6)
    at Nh (../../../../node_modules/.pnpm/react-dom@18.3.1_react@18.3.1/node_modules/react-dom/cjs/react-dom.production.min.js:160:136)
    at gj (../../../../node_modules/.pnpm/react-dom@18.3.1_react@18.3.1/node_modules/react-dom/cjs/react-dom.production.min.js:196:257)
    at bj (../../../../node_modules/.pnpm/react-dom@18.3.1_react@18.3.1/node_modules/react-dom/cjs/react-dom.production.min.js:194:203)
    at Fk (../../../../node_modules/.pnpm/react-dom@18.3.1_react@18.3.1/node_modules/react-dom/cjs/react-dom.production.min.js:296:99)
    at tj (../../../../node_modules/.pnpm/react-dom@18.3.1_react@18.3.1/node_modules/react-dom/cjs/react-dom.production.min.js:279:388)
    at tj (../../../../node_modules/.pnpm/react-dom@18.3.1_react@18.3.1/node_modules/react-dom/cjs/react-dom.production.min.js:279:319)
    at tj (../../../../node_modules/.pnpm/react-dom@18.3.1_react@18.3.1/node_modules/react-dom/cjs/react-dom.production.min.js:279:179)
组件堆栈：

    at https://vscode-remote+attached-002dcontainer-002b7b22636f6e7461696e65724e616d65223a222f73696d5f7632227d.vscode-resource.vscode-cdn.net/root/.vscode-server/extensions/rooveterinaryinc.roo-cline-3.51.0/webview-ui/build/assets/index.js:2750:9414
    at div
    at div
at Cao (../../../../webview-ui/src/components/chat/ChatRow.tsx:169:1)
    at div
    at https://vscode-remote+attached-002dcontainer-002b7b22636f6e7461696e65724e616d65223a222f73696d5f7632227d.vscode-resource.vscode-cdn.net/root/.vscode-server/extensions/rooveterinaryinc.roo-cline-3.51.0/webview-ui/build/assets/index.js:2750:10334
    at div
    at div
    at https://vscode-remote+attached-002dcontainer-002b7b22636f6e7461696e65724e616d65223a222f73696d5f7632227d.vscode-resource.vscode-cdn.net/root/.vscode-server/extensions/rooveterinaryinc.roo-cline-3.51.0/webview-ui/build/assets/index.js:261:39510
    at div
at dYt (../../../../node_modules/.pnpm/react-virtuoso@4.12.7_react-dom@18.3.1_react@18.3.1__react@18.3.1/node_modules/react-virtuoso/dist/index.mjs:2470:24)
    at div
    at https://vscode-remote+attached-002dcontainer-002b7b22636f6e7461696e65724e616d65223a222f73696d5f7632227d.vscode-resource.vscode-cdn.net/root/.vscode-server/extensions/rooveterinaryinc.roo-cline-3.51.0/webview-ui/build/assets/index.js:261:42379
    at https://vscode-remote+attached-002dcontainer-002b7b22636f6e7461696e65724e616d65223a222f73696d5f7632227d.vscode-resource.vscode-cdn.net/root/.vscode-server/extensions/rooveterinaryinc.roo-cline-3.51.0/webview-ui/build/assets/index.js:261:44530
    at https://vscode-remote+attached-002dcontainer-002b7b22636f6e7461696e65724e616d65223a222f73696d5f7632227d.vscode-resource.vscode-cdn.net/root/.vscode-server/extensions/rooveterinaryinc.roo-cline-3.51.0/webview-ui/build/assets/index.js:261:35648
    at div
    at div
at Alo (../../../../webview-ui/src/components/chat/ChatView.tsx:69:3)
at Bbo (../../../../webview-ui/src/App.tsx:69:5)
at d (../../../../node_modules/.pnpm/@radix-ui+react-context@1.1.2_@types+react@18.3.23_react@18.3.1/node_modules/@radix-ui/react-context/dist/index.mjs:27:14)
at X3t (../../../../node_modules/.pnpm/@radix-ui+react-tooltip@1.2.6_@types+react-dom@18.3.7_@types+react@18.3.23__@types+reac_99504aa956c623e0884a4e3cb215669a/node_modules/@radix-ui/react-tooltip/dist/index.mjs:29:4)
at A3 (../../../../webview-ui/src/components/ui/tooltip.tsx:8:47704)
at G6t (../../../../node_modules/.pnpm/@tanstack+react-query@5.76.1_react@18.3.1/node_modules/@tanstack/react-query/build/modern/QueryClientProvider.js:20:2)
at SHt (../../../../webview-ui/src/i18n/TranslationContext.tsx:16:70)
at xHt (../../../../webview-ui/src/context/ExtensionStateContext.tsx:192:86)
at jbo (../../../../webview-ui/src/components/ErrorBoundary.tsx:18:2)
at i (../../../../node_modules/.pnpm/react-i18next@15.5.1_i18next@25.2.1_typescript@5.8.3__react-dom@18.3.1_react@18.3.1__react@18.3.1_typescript@5.8.3/node_modules/react-i18next/dist/es/withTranslation.js:6:4)
at Wbo (../../../../webview-ui/src/App.tsx:319:25)

[roomote-v0]

I've analyzed this issue. The error TypeError: n.replace is not a function occurs in countMarkdownHeadings() at webview-ui/src/utils/markdown.ts:10 because message.text can be a non-string truthy value at runtime (e.g. when returning from a subtask to the parent task). The current guard if (!text) return 0 only catches falsy values, not non-string types.

Proposed fix:

1. In webview-ui/src/utils/markdown.ts, update the countMarkdownHeadings function to add a typeof check: if (!text || typeof text !== "string") return 0
2. Add a corresponding test case to verify the function handles non-string inputs gracefully

This is a minimal, defensive fix that prevents the crash without changing any upstream data flow.

Please mention @roomote in a comment saying that you approve this plan, and I'll proceed with the implementation.

[c-sunc6]

@roomote approve this plan

[roomote-v0]

Thanks for approving the plan! I'll proceed with the implementation now -- adding a typeof guard in countMarkdownHeadings and a test for non-string inputs. I'll open a PR shortly.

[roomote-v0]

Opened PR #11882 with the fix: added a typeof guard in countMarkdownHeadings so non-string values no longer crash the UI. Tests included. Feedback welcome!