Cascade messages returned from OnException middleware (supersedes #3000)

src/Http/Wolverine.Http.Tests/OnExceptionTests.cs

@@ -152,4 +152,23 @@ public async Task middleware_on_exception_handler()
         problem.ShouldNotBeNull();
         problem!.Title.ShouldBe("Global Error Handler");
     }
+
+    // PR #3000 regression: an HTTP-endpoint OnException with an *extra* injected parameter
+    // (the author's literal ILogger example) alongside the exception still resolves the
+    // parameter and returns its ProblemDetails response.
+    [Fact]
+    public async Task on_exception_with_extra_injected_parameter()
+    {
+        var result = await Scenario(x =>
+        {
+            x.Get.Url("/on-exception/injected-parameter");
+            x.StatusCodeShouldBe(500);
+            x.ContentTypeShouldBe("application/problem+json");
+        });
+
+        var problem = await result.ReadAsJsonAsync<Microsoft.AspNetCore.Mvc.ProblemDetails>();
+        problem.ShouldNotBeNull();
+        problem!.Title.ShouldBe("Injected Parameter Error");
+        problem.Detail.ShouldBe("Injected parameter error");
+    }
 }

src/Http/WolverineWebApi/OnExceptionEndpoints.cs

@@ -1,4 +1,5 @@
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Logging;
 using Wolverine.Http;
 
 namespace WolverineWebApi;
@@ -198,6 +199,30 @@ public static ProblemDetails OnException(Exception ex)
 
 #endregion
 
+// Probe (PR #3000 regression): does an HTTP-endpoint OnException support an *extra*
+// injected parameter alongside the exception (the author's literal ILogger example),
+// returning a ProblemDetails response?
+public static class InjectedParameterExceptionEndpoints
+{
+    [WolverineGet("/on-exception/injected-parameter")]
+    public static string EndpointThatThrowsForInjection()
+    {
+        throw new CustomHttpException("Injected parameter error");
+    }
+
+    public static ProblemDetails OnException(CustomHttpException ex,
+        ILogger<CustomHttpException> logger)
+    {
+        logger.LogError(ex, "Handled in OnException with an injected logger");
+        return new ProblemDetails
+        {
+            Status = 500,
+            Detail = ex.Message,
+            Title = "Injected Parameter Error"
+        };
+    }
+}
+
 #region sample_on_exception_void_return
 /// <summary>
 /// OnException with void return — exception is still swallowed