Keep stack frames that have no parameter list

src/Verify.Tests/ScrubStackTrace.cs

@@ -31,6 +31,34 @@ at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& complete
         return Verify(scrubbed);
     }
 
+    // NativeAOT renders unresolved frames with no parameter list
+    [Fact]
+    public Task NoParens()
+    {
+        var scrubbed = ScrubStackTrace.Scrub(
+            """
+            System.Exception: Boom
+               at MyApp!<BaseAddress>+0x1a2b3c
+               at MyApp.Program.Main(String[] args) in /src/Program.cs:line 12
+               at MyApp!<BaseAddress>+0x4d5e6f
+            """);
+        return Verify(scrubbed);
+    }
+
+    [Fact]
+    public Task NoParens_RemoveParams()
+    {
+        var scrubbed = ScrubStackTrace.Scrub(
+            """
+            System.Exception: Boom
+               at MyApp!<BaseAddress>+0x1a2b3c
+               at MyApp.Program.Main(String[] args) in /src/Program.cs:line 12
+               at MyApp!<BaseAddress>+0x4d5e6f
+            """,
+            removeParams: true);
+        return Verify(scrubbed);
+    }
+
     [Fact]
     public Task WhiteSpace()
     {

src/Verify.Tests/ScrubStackTraceTests.NoParens.verified.txt

@@ -0,0 +1,4 @@
+System.Exception: Boom
+at MyApp!<BaseAddress>+0x1a2b3c
+at MyApp.Program.Main(String[] args)
+at MyApp!<BaseAddress>+0x4d5e6f

src/Verify.Tests/ScrubStackTraceTests.NoParens_RemoveParams.verified.txt

@@ -0,0 +1,4 @@
+System.Exception: Boom
+at MyApp!<BaseAddress>+0x1a2b3c
+at MyApp.Program.Main(...)
+at MyApp!<BaseAddress>+0x4d5e6f

src/Verify/Serialization/Scrubbers/ScrubStackTrace.cs

@@ -36,6 +36,16 @@ public static string Scrub(string stackTrace, bool removeParams = false)
             var indexOfLeft = span.IndexOf('(');
 
             var indexOfRight = span.IndexOf(')');
+
+            // Not every frame has a parameter list. NativeAOT renders unresolved frames
+            // as `at MyApp!<BaseAddress>+0x1a2b3c`, which has nothing to trim.
+            if (indexOfLeft == -1 ||
+                indexOfRight == -1)
+            {
+                builder.AppendLineN(span);
+                continue;
+            }
+
             if (removeParams)
             {
                 var next = indexOfLeft + 1;

src/todo.md

@@ -61,7 +61,7 @@ All six resolved 2026-08-16 (five fixed here; the inline item resolved as by-des
 
 ## Minor / edge cases
 
-- [ ] **Stack-trace scrubber destroys paren-less `at` frames** (NativeAOT: `at MyApp!<BaseAddress>+0x1a2b3c`).
+- [x] **Stack-trace scrubber destroys paren-less `at` frames** (NativeAOT: `at MyApp!<BaseAddress>+0x1a2b3c`).
   `Verify/Serialization/Scrubbers/ScrubStackTrace.cs:36-58` — `IndexOf('(')`/`')'` return −1, slice keeps zero chars → frame becomes an empty line, or the literal `...)` with `removeParams: true`.
 
 - [ ] **MSTest source generator ignores `record` test classes.**