fix(tables): guard date coercion against out-of-range values

Author: TheodoreSpeaks

apps/sim/lib/table/__tests__/validation.test.ts

@@ -343,6 +343,20 @@ describe('Validation', () => {
       expect(data.created).toBe(date.toISOString())
     })
 
+    it('nulls an out-of-range epoch number for an optional date column without throwing', () => {
+      const data = { name: 'Acme', founded: 2000, created: 1e20 }
+      const result = coerceRowToSchema(data, schema)
+      expect(result.valid).toBe(true)
+      expect(data.created).toBeNull()
+    })
+
+    it('nulls an invalid Date instance for an optional date column without throwing', () => {
+      const data = { name: 'Acme', founded: 2000, created: new Date('not-a-date') }
+      const result = coerceRowToSchema(data, schema)
+      expect(result.valid).toBe(true)
+      expect(data.created).toBeNull()
+    })
+
     it('leaves already-correct values untouched and passes through json', () => {
       const data = { name: 'Acme', founded: 2000, metadata: { k: 'v' } }
       const result = coerceRowToSchema(data, schema)

apps/sim/lib/table/validation.ts

@@ -289,13 +289,17 @@ function coerceValueToColumnType(
         if (normalized === 'false') return { ok: true, value: false }
       }
       return { ok: false }
-    case 'date':
-      if (value instanceof Date) return { ok: true, value: value.toISOString() }
+    case 'date': {
       if (typeof value === 'string' && !Number.isNaN(Date.parse(value))) return { ok: true, value }
-      if (typeof value === 'number' && Number.isFinite(value)) {
-        return { ok: true, value: new Date(value).toISOString() }
-      }
+      // Date instances and epoch numbers may still be out of the representable
+      // range (>±8.64e15ms) — guard `toISOString()`, which throws RangeError on
+      // an Invalid Date, so an over-range value degrades to `{ ok: false }`
+      // rather than crashing the write.
+      const date =
+        value instanceof Date ? value : typeof value === 'number' ? new Date(value) : null
+      if (date && !Number.isNaN(date.getTime())) return { ok: true, value: date.toISOString() }
       return { ok: false }
+    }
     default:
       return { ok: true, value }
   }