diff --git a/docs/CONTRIBUTORS b/docs/CONTRIBUTORS
index af3f4e00d..338d08311 100644
--- a/docs/CONTRIBUTORS
+++ b/docs/CONTRIBUTORS
@@ -110,6 +110,7 @@ Ilya Barkov
 Iru Cai
 Ivan Vnučec
 Iztok Jeras
+JAEUK LEE
 Jaeuk Lee (이재욱)
 Jake Merdich
 Jakub Michalski
diff --git a/src/V3Width.cpp b/src/V3Width.cpp
index 46f2b0f0b..46fc29914 100644
--- a/src/V3Width.cpp
+++ b/src/V3Width.cpp
@@ -972,13 +972,9 @@ class WidthVisitor final : public VNVisitor {
     bool streamImplicitUseAllowed(const AstNodeStream* nodep) const {
         const AstNode* backp = nodep->backp();
         while (true) {
-            if (const AstArg* const argp = VN_CAST(backp, Arg)) {
-                backp = argp->backp();
-            } else if (const AstSFormatArg* const argp = VN_CAST(backp, SFormatArg)) {
-                backp = argp->backp();
-            } else if (VN_IS(backp, CvtArrayToArray) || VN_IS(backp, CvtArrayToPacked)
-                       || VN_IS(backp, CvtPackedToArray) || VN_IS(backp, CvtPackString)
-                       || VN_IS(backp, CvtUnpackedToQueue)) {
+            if (VN_IS(backp, Arg) || VN_IS(backp, SFormatArg) || VN_IS(backp, CvtArrayToArray)
+                || VN_IS(backp, CvtArrayToPacked) || VN_IS(backp, CvtPackedToArray)
+                || VN_IS(backp, CvtPackString) || VN_IS(backp, CvtUnpackedToQueue)) {
                 backp = backp->backp();
             } else {
                 break;
diff --git a/test_regress/t/t_display_stream_bad.out b/test_regress/t/t_display_stream_bad.out
index 823853243..f667f0005 100644
--- a/test_regress/t/t_display_stream_bad.out
+++ b/test_regress/t/t_display_stream_bad.out
@@ -1,42 +1,42 @@
-%Error: t/t_display_stream_bad.v:14:15: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
-                                      : ... note: In instance 't'
-                                      : ... Suggest use a cast
-   14 |     result = {<<{value}} + 1;
-      |               ^~
-        ... See the manual at https://verilator.org/verilator_doc.html?v=latest for more assistance.
-%Error: t/t_display_stream_bad.v:15:23: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
-                                      : ... note: In instance 't'
-                                      : ... Suggest use a cast
-   15 |     result = value + {<<{value}};
-      |                       ^~
-%Error: t/t_display_stream_bad.v:16:26: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
-                                      : ... note: In instance 't'
-                                      : ... Suggest use a cast
-   16 |     result = value[0] ? {<<{value}} : other;
-      |                          ^~
-%Error: t/t_display_stream_bad.v:17:16: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
-                                      : ... note: In instance 't'
-                                      : ... Suggest use a cast
-   17 |     result = {{<<{value}}};
-      |                ^~
-%Error: t/t_display_stream_bad.v:18:14: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
-                                      : ... note: In instance 't'
-                                      : ... Suggest use a cast
-   18 |     flag = ({<<{value}} == other);
-      |              ^~
 %Error: t/t_display_stream_bad.v:19:15: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
                                       : ... note: In instance 't'
                                       : ... Suggest use a cast
-   19 |     $display({<<{value}});
+   19 |     result = {<<{value}} + 1;
       |               ^~
-%Error: t/t_display_stream_bad.v:20:22: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
+        ... See the manual at https://verilator.org/verilator_doc.html?v=latest for more assistance.
+%Error: t/t_display_stream_bad.v:20:23: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
                                       : ... note: In instance 't'
                                       : ... Suggest use a cast
-   20 |     $display("%0d", {<<{value}});
+   20 |     result = value + {<<{value}};
+      |                       ^~
+%Error: t/t_display_stream_bad.v:21:26: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
+                                      : ... note: In instance 't'
+                                      : ... Suggest use a cast
+   21 |     result = value[0] ? {<<{value}} : other;
+      |                          ^~
+%Error: t/t_display_stream_bad.v:22:16: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
+                                      : ... note: In instance 't'
+                                      : ... Suggest use a cast
+   22 |     result = {{<<{value}}};
+      |                ^~
+%Error: t/t_display_stream_bad.v:23:14: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
+                                      : ... note: In instance 't'
+                                      : ... Suggest use a cast
+   23 |     flag = ({<<{value}} == other);
+      |              ^~
+%Error: t/t_display_stream_bad.v:24:15: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
+                                      : ... note: In instance 't'
+                                      : ... Suggest use a cast
+   24 |     $display({<<{value}});
+      |               ^~
+%Error: t/t_display_stream_bad.v:25:22: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
+                                      : ... note: In instance 't'
+                                      : ... Suggest use a cast
+   25 |     $display("%0d", {<<{value}});
       |                      ^~
-%Error: t/t_display_stream_bad.v:21:29: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
+%Error: t/t_display_stream_bad.v:26:29: Streaming concatenation cannot be used in an implicitly cast context (IEEE 1800-2023 11.4.17)
                                       : ... note: In instance 't'
                                       : ... Suggest use a cast
-   21 |     void'($sformatf("%0d", {<<{value}}));
+   26 |     void'($sformatf("%0d", {<<{value}}));
       |                             ^~
 %Error: Exiting due to
diff --git a/test_regress/t/t_display_stream_bad.v b/test_regress/t/t_display_stream_bad.v
index 9c534a277..6df222cf7 100644
--- a/test_regress/t/t_display_stream_bad.v
+++ b/test_regress/t/t_display_stream_bad.v
@@ -10,7 +10,12 @@ module t;
   int result;
   bit flag;
 
+  function automatic int passthrough(input int arg);
+    return arg;
+  endfunction
+
   initial begin
+    result = passthrough({<<{value}});
     result = {<<{value}} + 1;
     result = value + {<<{value}};
     result = value[0] ? {<<{value}} : other;