File Search Pattern Matching Fails in Claude Code

Bug Description
Looks like Claude finds some paths, but searching for patterns in files doesn't work. This is similar to #5062 but looks like there's other problems with the search too.

Environment Info

• Platform: win32
• Terminal: rider
• Version: 1.0.67
• Feedback ID: 8ae4e0ac-4076-4388-adf1-cf635363dd46

Errors

[{"error":"Error: Plugin source missing\n    at vSG (B:/~BUN/root/claude.exe:1283:30201)\n    at vSG (B:/~BUN/root/claude.exe:1283:30900)\n    at Dv9 (B:/~BUN/root/claude.exe:1284:4916)\n    at Dv9 (B:/~BUN/root/claude.exe:1284:4980)\n    at Wv9 (B:/~BUN/root/claude.exe:1284:2196)\n    at Wv9 (B:/~BUN/root/claude.exe:1284:2499)\n    at <anonymous> (B:/~BUN/root/claude.exe:1285:3605)\n    at <anonymous> (B:/~BUN/root/claude.exe:1285:3800)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-08-06T22:47:35.040Z"},{"error":"Error: Failed to copy executable from C:\\Users\\Pannoniae\\.local\\share\\claude\\versions\\1.0.70 to C:\\Users\\Pannoniae\\.local\\bin\\claude.exe: Error: EPERM: operation not permitted, unlink 'C:\\Users\\Pannoniae\\.local\\bin\\claude.exe'\n    at C8Y (B:/~BUN/root/claude.exe:2290:19851)\n    at <anonymous> (B:/~BUN/root/claude.exe:2290:19418)\n    at <anonymous> (B:/~BUN/root/claude.exe:2290:19435)\n    at PtG (B:/~BUN/root/claude.exe:2290:17344)\n    at processTicksAndRejections (native:7:39)\n    at spawnSync (unknown)\n    at spawnSync (node:child_process:226:22)\n    at execSync (node:child_process:275:109)\n    at L6 (B:/~BUN/root/claude.exe:709:5217)\n    at pI0 (B:/~BUN/root/claude.exe:709:5508)","timestamp":"2025-08-06T22:47:35.347Z"},{"error":"Error: Failed to copy executable from C:\\Users\\Pannoniae\\.local\\share\\claude\\versions\\1.0.70 to C:\\Users\\Pannoniae\\.local\\bin\\claude.exe: Error: EPERM: operation not permitted, unlink 'C:\\Users\\Pannoniae\\.local\\bin\\claude.exe'\n    at C8Y (B:/~BUN/root/claude.exe:2290:19851)\n    at <anonymous> (B:/~BUN/root/claude.exe:2290:19418)\n    at <anonymous> (B:/~BUN/root/claude.exe:2290:19435)\n    at PtG (B:/~BUN/root/claude.exe:2290:17344)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-08-06T22:49:48.407Z"},{"error":"Error: Request was aborted.\n    at new tW (unknown:1:28)\n    at new IY (B:/~BUN/root/claude.exe:1173:12072)\n    at new pJ (B:/~BUN/root/claude.exe:1173:12860)\n    at makeRequest (B:/~BUN/root/claude.exe:1190:3652)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-08-06T22:50:12.506Z"},{"error":"Error: Failed to copy executable from C:\\Users\\Pannoniae\\.local\\share\\claude\\versions\\1.0.70 to C:\\Users\\Pannoniae\\.local\\bin\\claude.exe: Error: EPERM: operation not permitted, unlink 'C:\\Users\\Pannoniae\\.local\\bin\\claude.exe'\n    at C8Y (B:/~BUN/root/claude.exe:2290:19851)\n    at <anonymous> (B:/~BUN/root/claude.exe:2290:19418)\n    at <anonymous> (B:/~BUN/root/claude.exe:2290:19435)\n    at PtG (B:/~BUN/root/claude.exe:2290:17344)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-08-06T22:51:07.084Z"}]