From 396ceebf0dc021da2fa7cc38a7daf9e25bd1ede7 Mon Sep 17 00:00:00 2001
From: Wilfried Goesgens <willi@arangodb.com>
Date: Wed, 13 Nov 2019 10:24:10 +0100
Subject: [PATCH] "run with --log v8=debug" to see the stacktraces of logged
 error messages (#10373)

---
 lib/V8/v8-utils.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/V8/v8-utils.cpp b/lib/V8/v8-utils.cpp
index 98a08a2e71..8c8ad3010e 100644
--- a/lib/V8/v8-utils.cpp
+++ b/lib/V8/v8-utils.cpp
@@ -5113,6 +5113,15 @@ void TRI_LogV8Exception(v8::Isolate* isolate, v8::TryCatch* tryCatch) {
 
       LOG_TOPIC("cb0bd", ERR, arangodb::Logger::FIXME) << "!" << l;
     }
+    auto stacktraceV8 =
+      tryCatch->StackTrace(TRI_IGETC).FromMaybe(v8::Local<v8::Value>());
+    TRI_Utf8ValueNFC stacktrace(isolate, stacktraceV8);
+
+    if (*stacktrace && stacktrace.length() > 0) {
+      LOG_TOPIC("cb0bf", DEBUG, arangodb::Logger::V8) << "!" <<
+        "stacktrace: " + std::string(*stacktrace) + "\n";
+    }
+
   }
 }