catch and ignore the exception when SYCL_*_TRACE is malformed

Author: Piotr Balcer

source/ur/ur.cpp

@@ -17,7 +17,15 @@ bool PrintTrace = [] {
   const char *UrRet = std::getenv("SYCL_UR_TRACE");
   const char *PiRet = std::getenv("SYCL_PI_TRACE");
   const char *Trace = UrRet ? UrRet : (PiRet ? PiRet : nullptr);
-  const int TraceValue = Trace ? std::stoi(Trace) : 0;
+  int TraceValue = 0;
+  if (Trace) {
+    try {
+      TraceValue = std::stoi(Trace);
+    } catch (...) {
+      // no-op, we don't have a logger yet to output an error.
+    }
+  }
+
   if (TraceValue == -1 || TraceValue == 2) {
     return true;
   }