[Bug] Segmentation fault in Bun runtime during parallel execution

Bun crashing continuously during parallelization since todays CC update. Other reports note a potential relation with a recent windows update as well.

Bug Description
panic(main thread): Segmentation fault at address 0xFFFFFFFFFFFFFFFF
oh no: Bun has crashed. This indicates a bug in Bun, not your code.

To send a redacted crash report to Bun's team,
please file a GitHub issue using the link below: continued crashes during parallelization from bun

Environment Info

• Platform: win32
• Terminal: windows-terminal
• Version: 2.1.50
• Feedback ID: 42640204-418d-43fa-bc55-176ecc5cbd5d

Errors

[{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at S6H (B:/~BUN/root/claude.exe:1886:15122)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-21T07:30:17.738Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at S6H (B:/~BUN/root/claude.exe:1886:15122)\n    at async W (B:/~BUN/root/claude.exe:2842:15249)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-21T07:30:18.208Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at S6H (B:/~BUN/root/claude.exe:1886:15122)\n    at async U (B:/~BUN/root/claude.exe:2842:15782)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-21T07:30:18.210Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at S6H (B:/~BUN/root/claude.exe:1886:15122)\n    at async W (B:/~BUN/root/claude.exe:2842:15249)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-21T07:30:32.323Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at S6H (B:/~BUN/root/claude.exe:1886:15122)\n    at async U (B:/~BUN/root/claude.exe:2842:15782)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-21T07:30:32.324Z"}]