Wrap `main` content in try block for exception safety.

example/example.cpp

@@ -33,6 +33,7 @@ void mdc_example();
 #include "spdlog/fmt/ostr.h"  // support for user defined types
 
 int main(int, char *[]) {
+    try {
         // Log levels can be loaded from argv/env using "SPDLOG_LEVEL"
         load_levels_example();
 
@@ -58,8 +59,8 @@ int main(int, char *[]) {
         spdlog::set_level(spdlog::level::info);
 
         // Backtrace support
-    // Loggers can store in a ring buffer all messages (including debug/trace) for later inspection.
-    // When needed, call dump_backtrace() to see what happened:
+        // Loggers can store in a ring buffer all messages (including debug/trace) for later
+        // inspection. When needed, call dump_backtrace() to see what happened:
         spdlog::enable_backtrace(10);  // create ring buffer with capacity of 10  messages
         for (int i = 0; i < 100; i++) {
             spdlog::debug("Backtrace message {}", i);  // not logged..
@@ -67,7 +68,6 @@ int main(int, char *[]) {
         // e.g. if some error happened:
         spdlog::dump_backtrace();  // log them now!
 
-    try {
         stdout_logger_example();
         basic_example();
         rotating_example();