[BUG] When Claude Code is running a Task tool and a sub-agent is processing something, something happens and Claude Code crashes.

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Other: <!-- specify -->
• [ ] Google Vertex AI
• Claude CLI version: 1.0.51 (Claude Code)
• Operating System: Ubuntu 24.04.2 LTS (Windows 11, WSL2)
• Terminal: bash

Bug Description

Steps to Reproduce

Expected Behavior

Actual Behavior

Additional Context

Here is the full crash log from the terminal:

file:///home/ubuntu/.nvm/versions/node/v22.17.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:627
`),D.add(A.uuid)}}async getAllTranscripts(){await this.loadAllSessions();let A=[...this.messages.values()],B=new Set(A.map((Q)=>Q.parentUuid));return A.filter((Q)=>!B.has(Q.uuid)).map((Q)=>this.getTranscript(Q)).filter((Q)=>Q.length)}getTranscript(A){let B=[],Q=A;while(Q)B.unshift(Q),Q=Q.parentUuid?this.messages.get(Q.parentUuid):void 0;return B}async getLastLog(A){let{messages:B}=await hu1(A);if(B.size===0)return null;let D=Array.from(B.values()).sort((G,F)=>new Date(F.timestamp).getTime()-new Date(G.timestamp).getTime())[0];if(!D)return null;let I=[],Z=D;while(Z)I.unshift(Z),Z=Z.parentUuid?B.get(Z.parentUuid):void 0;return I}getAllCheckpoints(A){let B=new Map,Q=A[A.length-1]?.sessionId;if(Q){let D=this.checkpoints.get(Q)?.values()||[];for(let I of D)B.set(I.commit,I)}return Array.from(B.values())}loadAllSessions=L0(async()=>{let A=rF1(vu1),B=v1();if(this.didLoad)return this;try{B.statSync(A)}catch{return this}let D=B.readdirSync(A).filter((Z)=>Z.isFile()&&Z.name.endsWith(".jsonl")).map((Z)=>Ko(A,Z.name)),I=await Promise.all(D.sort((Z,G)=>{let F=B.statSync(Z),Y=B.statSync(G);return F.mtime.getTime()-Y.mtime.getTime()}).map(async(Z)=>{let G=PK(M9Q(Z,".jsonl"));if(!G)return{sessionId:G,sessionMessages:new Set};let F=new Map,Y=new Map,W=new Map;try{await B.stat(Z);for(let J of await zy1(Z))if(J.type==="user"||J.type==="assistant"||J.type==="attachment"||J.type==="system")F.set(J.uuid,J);else if(J.type==="summary"&&J.leafUuid)Y.set(J.leafUuid,J.summary);else if(J.type==="checkpoint")W.set(J.commit,J)}catch{}return{sessionId:G,sessionMessages:F,summaries:Y,checkpoints:W}}));for(let{sessionId:Z,sessionMessages:G,summaries:F,checkpoints:Y}of I){if(!Z)continue;for(let[W,J]of G.entries())this.messages.set(W,J);for(let[W,J]of F.entries())this.summaries.set(W,J);this.checkpoints.set(Z,Array.from(Y.values()))}return this.didLoad=!0,this})}async function oF1(A){let B=Fw0(A);return await wq().insertMessageChain(B),B[B.length-1]?.uuid||null}async function tF1(A){await wq().insertMessageChain(Fw0(A),!0)}async function bu1(A){await wq().insertCheckpoint(A)}async function Qw0(){let A=wq();A.sessionFile=sF1()}function O9Q(A){let B=A.find((I)=>I.type==="user");if(!B||B.type!=="user")return"No prompt";let Q=B.message?.content,D="";if(typeof Q==="string")D=Q;else if(Array.isArray(Q))D=Q.find((Z)=>Z.type==="text")?.text||"No prompt";else D="No prompt";if(D=D.replace(/\n/g," ").trim(),D.length>45)D=D.slice(0,45)+"...";return D}function T9Q(A){return A.map((B)=>{let{isSidechain:Q,parentUuid:D,...I}=B;return I})}function Dw0(A,B=0,Q,D){let I=A[A.length-1],Z=A[0],G=O9Q(A),F=new Date(Z.timestamp),Y=new Date(I.timestamp),W=D?.map((J)=>({commit:J.commit,timestamp:new 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gu1(B)}var P9Q=L0(async(A)=>{let{messages:B,checkpoints:Q}=await hu1(A);return{messageSet:new Set(B.keys()),checkpointSet:new Set(Q.keys())}},(A)=>A);async function Gw0(A){let B=await wq().getLastLog(A);if(B!==null&&B!==void 0){let Q=B[B.length-1],{summaries:D,checkpoints:I}=await hu1(A),Z=Q?D.get(Q.uuid):void 0;return Dw0(B,0,Z,Array.from(I.values()))}return null}function Fw0(A){return A.filter((B)=>{if(B.type==="progress")return!1;if(B.type==="attachment"&&Aw0()!=="ant")return!1;return!0})}var eF1=[],_9Q=100;function j9Q(A){return A.toISOString().replace(/[:.]/g,"-")}var du1=j9Q(new Date);function y9Q(){return mu1(Kz.errors(),du1+".txt")}var uu1=!1;function b1(A){if(uu1)return;uu1=!0;try{if(process.env.CLAUDE_CODE_USE_BEDROCK||process.env.CLAUDE_CODE_USE_VERTEX||process.env.DISABLE_ERROR_REPORTING||process.env.CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC)return;if(x4(!1))console.error(A);let B=A.stack||A.message,Q={error:B,timestamp:new 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RangeError: Invalid string length
    at Socket.<anonymous> (file:///home/ubuntu/.nvm/versions/node/v22.17.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:627:8993)
    at Socket.emit (node:events:530:35)
    at Socket.emit (node:domain:489:12)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)

Node.js v22.17.0