Fix uncaught exception caused by invalid UTF-8 data

.github/workflows/build.yml

@@ -2,7 +2,7 @@ name: build
 
 on:
   push:
-    branches: [ master ]
+    branches: [ master, dev ]
     tags: [ 'v*' ]
   pull_request:
     branches: [ master ]

CHANGES.md

@@ -1,5 +1,11 @@
 # redsea changelog
 
+## 1.0.1 (2024-xx-xx)
+
+* Fixes:
+  * Fix a crash (uncaught exception) when attempting to serialize a string that's
+    invalid UTF-8
+
 ## 1.0 (2024-06-27)
 
 * New features:

meson.build

@@ -1,5 +1,5 @@
 project('redsea', 'cpp', default_options : ['warning_level=3', 'buildtype=release', 'optimization=3'],
-        version: '1.0')
+        version: '1.0.1')
 
 # Store version number to be compiled in
 conf = configuration_data()

src/groups.cc

@@ -312,7 +312,18 @@ void Station::updateAndPrint(const Group& group, std::ostream& stream) {
     }
   }
 
-  stream << json_ << std::endl << std::flush;
+  try {
+    // nlohmann::operator<< throws if a string contains non-UTF8 data.
+    // It's better to throw while writing to a stringstream; otherwise
+    // incomplete JSON objects could get printed.
+    std::stringstream output_proxy_stream;
+    output_proxy_stream << json_ << std::endl << std::flush;
+    stream << output_proxy_stream.str();
+  } catch (const std::exception& e) {
+    nlohmann::ordered_json json_from_exception;
+    json_from_exception["debug"] = std::string(e.what());
+    stream << json_from_exception;
+  }
 }
 
 uint16_t Station::getPI() const {