Log the invalid format string to help grepping it in the logs.

lib/src/srslog/formatters/json_formatter.cpp

@@ -32,6 +32,7 @@ void json_formatter::format(detail::log_entry_metadata&& metadata, fmt::memory_b
         fmt::vprintf(buffer, fmt::to_string_view(metadata.fmtstring), args);
       } catch (...) {
         fmt::print(stderr, "srsLog error - Invalid format string: \"{}\"\n", metadata.fmtstring);
+        fmt::format_to(buffer, " -> srsLog error - Invalid format string: \"{}\"", metadata.fmtstring);
 #ifdef STOP_ON_WARNING
         std::abort();
 #endif
@@ -69,6 +70,7 @@ void json_formatter::format_context_begin(const detail::log_entry_metadata& md,
         fmt::vprintf(buffer, fmt::to_string_view(md.fmtstring), args);
       } catch (...) {
         fmt::print(stderr, "srsLog error - Invalid format string: \"{}\"\n", md.fmtstring);
+        fmt::format_to(buffer, " -> srsLog error - Invalid format string: \"{}\"", md.fmtstring);
 #ifdef STOP_ON_WARNING
         std::abort();
 #endif

lib/src/srslog/formatters/text_formatter.cpp

@@ -70,6 +70,7 @@ void text_formatter::format(detail::log_entry_metadata&& metadata, fmt::memory_b
         fmt::vprintf(buffer, fmt::to_string_view(metadata.fmtstring), args);
       } catch (...) {
         fmt::print(stderr, "srsLog error - Invalid format string: \"{}\"\n", metadata.fmtstring);
+        fmt::format_to(buffer, " -> srsLog error - Invalid format string: \"{}\"", metadata.fmtstring);
 #ifdef STOP_ON_WARNING
         std::abort();
 #endif
@@ -117,6 +118,7 @@ void text_formatter::format_context_end(const detail::log_entry_metadata& md,
       fmt::vprintf(buffer, fmt::to_string_view(md.fmtstring), args);
     } catch (...) {
       fmt::print(stderr, "srsLog error - Invalid format string: \"{}\"\n", md.fmtstring);
+      fmt::format_to(buffer, " -> srsLog error - Invalid format string: \"{}\"", md.fmtstring);
 #ifdef STOP_ON_WARNING
       std::abort();
 #endif