fix: Make JsonMaterialDecorator IO error more explicit (#1500)

This has caused confusion because the error doesn't mention which file it's actually trying to open.
acts-project · Sep 7, 2022 · 087ed98 · 087ed98
1 parent 433a379
commit 087ed98
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/Plugins/Json/include/Acts/Plugins/Json/JsonMaterialDecorator.hpp b/Plugins/Json/include/Acts/Plugins/Json/JsonMaterialDecorator.hpp
@@ -50,7 +50,8 @@ class JsonMaterialDecorator : public IMaterialDecorator {
     ACTS_VERBOSE("Reading JSON material description from: " << jFileName);
     std::ifstream ifj(jFileName.c_str());
     if (!ifj.good()) {
-      throw std::runtime_error{"Unable to open input JSON material file"};
+      throw std::runtime_error{"Unable to open input JSON material file: " +
+                               jFileName};
     }
     nlohmann::json jin;