Adding exception handlers

python/lib/dependabot/python/update_checker/poetry_version_resolver.rb

@@ -364,6 +364,7 @@ class PoetryErrorHandler < UpdateChecker
 
       # server response error codes while accessing package index
       SERVER_ERROR_CODES = T.let({
+        server500: /500 Server Error/,
         server502: /502 Server Error/,
         server503: /503 Server Error/,
         server504: /504 Server Error/
@@ -409,6 +410,7 @@ def sanitize_url(url)
       # rubocop:disable Metrics/PerceivedComplexity
       sig { params(error: Exception).void }
       def handle_poetry_error(error)
+        debugger
         Dependabot.logger.warn(error.message)
 
         if (msg = error.message.match(PoetryVersionResolver::INCOMPATIBLE_CONSTRAINTS) ||

python/spec/dependabot/python/update_checker/poetry_version_resolver_spec.rb

@@ -486,6 +486,22 @@
       end
     end
 
+    context "with private registry authentication 504 Server Error" do
+      let(:response) do
+        "Creating virtualenv pylossmap-m4-85W1Y-py3.13 in /home/dependabot/.cache/pypoetry/virtualenvs
+        Updating dependencies
+        Resolving dependencies...
+        
+        500 Server Error: Internal Server Error for url: http://acc-py-repo.cern.ch:8081/repository/vr-py-releases/simple/jinja2/"
+      end
+      it "raises a helpful error" do
+        expect { poetry_error_handler }.to raise_error(Dependabot::InconsistentRegistryResponse) do |error|
+          expect(error.message)
+            .to include("http://acc-py-repo.cern.ch")
+        end
+      end
+    end
+
     context "with private registry authentication 504 Server Error" do
       let(:response) do
         "Creating virtualenv alk-service-import-product-TbrdR40A-py3.8 in /home/dependabot/.cache/pypoetry/virtualenvs