errorinfo constructor test

src/error-demo/error-demo.cc

@@ -23,6 +23,16 @@ int main()
         logger->logEI(e.info());
     }
 
+
+    // ErrorInfo constructor
+    try {
+        auto e = Error("generic error");
+        throw DemoError(e.info());
+    } catch (Error &e) {
+        logger->logEI(e.info());
+    }
+
+
     // For completeness sake, info through vomit levels.
     // But this is maybe a heavy format for those.
     logger->logEI(

src/libstore/binary-cache-store.cc

@@ -284,7 +284,7 @@ void BinaryCacheStore::narFromPath(const StorePath & storePath, Sink & sink)
     try {
         getFile(info->url, *decompressor);
     } catch (NoSuchBinaryCacheFile & e) {
-        throw SubstituteGone(e.what());
+        throw SubstituteGone(e.info());
     }
 
     decompressor->finish();

src/libstore/remote-store.cc

@@ -365,7 +365,7 @@ void RemoteStore::queryPathInfoUncached(const StorePath & path,
             } catch (Error & e) {
                 // Ugly backwards compatibility hack.
                 if (e.msg().find("is not valid") != std::string::npos)
-                    throw InvalidPath(e.what());
+                    throw InvalidPath(e.info());
                 throw;
             }
             if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 17) {

src/libutil/error.hh

@@ -83,6 +83,7 @@ class BaseError : public std::exception
 protected:
     string prefix_; // used for location traces etc.
     ErrorInfo err;
+
     std::optional<string> what_;
     const string& calcWhat()
     {