FlameChart issues when call stack is deeper than 512

[downace]

I found already merged PR #275. But it's still not working.

I'm getting 500 response and error in logs:

TypeError: fwrite(): Argument #2 ($data) must be of type string, false given in /app/vendor/nyholm/psr7/src/Stream.php at line 228

I guess this is because returned array is JSON encoded before sending response, and depth parameter is not specified here:

        $response->getBody()->write(\json_encode($payload));

---

This happens only on first FlameChart request, before it's cached in filesystem. After that, I'm getting another error:

Modules\Profiler\Interfaces\Queries\FindFlameChartByUuidHandler::__invoke(): Return value must be of type array|string, null returned

The depth parameter is also not specified in this line:

server/app/modules/Profiler/Interfaces/Queries/FindFlameChartByUuidHandler.php

Lines 26 to 28 in 0a6773f

	if ($this->bucket->exists($file)) {
	return \json_decode($this->bucket->getContents($file), true);
	}

---

Solution that worked in my case: return JSON string directly instead of array:

         if ($this->bucket->exists($file)) {
-            return \json_decode($this->bucket->getContents($file), true);
+            return $this->bucket->getContents($file);
         }

-        $this->bucket->write($file, \json_encode($waterfall, 0, 5000));
+        $response = \json_encode($waterfall, 0, 5000);
+        $this->bucket->write($file, $response);
 
-        return $waterfall;
+        return $response;
     }