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Potential fix for code scanning alert no. 13: Local scope variable shadows member #345

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merged 2 commits into from
Mar 11, 2025

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krishnprakash
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Potential fix for https://github.com/krishnprakash/codeql/security/code-scanning/13

To fix the problem, we need to rename the local variable parent in the Emit method to avoid shadowing the member variable parent. This will make the code clearer and prevent any potential confusion or bugs related to variable shadowing.

  • Rename the local variable parent in the Emit method to a different name, such as localParent.
  • Update all references to the local variable within the Emit method to use the new name.

Suggested fixes powered by Copilot Autofix. Review carefully before merging.

…adows member

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Signed-off-by: Phileco <[email protected]>
@github-actions github-actions bot added the C# label Mar 11, 2025
@@ -118,9 +118,9 @@
}
}

private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location loc, IEntity parent, Type type)
private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location loc, IEntity localParent, Type type)

Check notice

Code scanning / CodeQL

Local scope variable shadows member

Local scope variable 'loc' shadows [TypeMention.loc](1).

Copilot Autofix AI 14 days ago

To fix the problem, we need to rename the local variable loc in the Emit method to avoid shadowing the member variable loc. This will make the code clearer and prevent any potential confusion or bugs related to variable shadowing.

  • In general terms, we should rename the local variable to something unique that does not conflict with any member variables.
  • Specifically, we will rename the local variable loc in the Emit method to location.
  • This change will be made in the file csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs on line 121.
  • No additional methods, imports, or definitions are needed to implement this change.
Suggested changeset 1
csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs

Autofix patch

Autofix patch
Run the following command in your local git repository to apply this patch
cat << 'EOF' | git apply
diff --git a/csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs b/csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs
--- a/csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs
+++ b/csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs
@@ -120,6 +120,6 @@
 
-        private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location loc, IEntity localParent, Type type)
+        private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location location, IEntity localParent, Type type)
         {
             trapFile.type_mention(this, type.TypeRef, localParent);
-            trapFile.type_mention_location(this, Context.CreateLocation(loc));
+            trapFile.type_mention_location(this, Context.CreateLocation(location));
         }
EOF
@@ -120,6 +120,6 @@

private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location loc, IEntity localParent, Type type)
private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location location, IEntity localParent, Type type)
{
trapFile.type_mention(this, type.TypeRef, localParent);
trapFile.type_mention_location(this, Context.CreateLocation(loc));
trapFile.type_mention_location(this, Context.CreateLocation(location));
}
Copilot is powered by AI and may make mistakes. Always verify output.
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@@ -118,9 +118,9 @@
}
}

private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location loc, IEntity parent, Type type)
private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location loc, IEntity localParent, Type type)

Check notice

Code scanning / CodeQL

Local scope variable shadows member

Local scope variable 'type' shadows [TypeMention.type](1).

Copilot Autofix AI 14 days ago

To fix the problem, we need to rename the local variable type in the Emit method to avoid shadowing the member variable type. This can be done by choosing a different name for the local variable that clearly distinguishes it from the member variable. We will update the method signature and all references to the local variable within the method.

Suggested changeset 1
csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs

Autofix patch

Autofix patch
Run the following command in your local git repository to apply this patch
cat << 'EOF' | git apply
diff --git a/csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs b/csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs
--- a/csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs
+++ b/csharp/extractor/Semmle.Extraction.CSharp/Entities/TypeMention.cs
@@ -120,5 +120,5 @@
 
-        private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location loc, IEntity localParent, Type type)
+        private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location loc, IEntity localParent, Type localType)
         {
-            trapFile.type_mention(this, type.TypeRef, localParent);
+            trapFile.type_mention(this, localType.TypeRef, localParent);
             trapFile.type_mention_location(this, Context.CreateLocation(loc));
EOF
@@ -120,5 +120,5 @@

private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location loc, IEntity localParent, Type type)
private void Emit(TextWriter trapFile, Microsoft.CodeAnalysis.Location loc, IEntity localParent, Type localType)
{
trapFile.type_mention(this, type.TypeRef, localParent);
trapFile.type_mention(this, localType.TypeRef, localParent);
trapFile.type_mention_location(this, Context.CreateLocation(loc));
Copilot is powered by AI and may make mistakes. Always verify output.
Unable to commit as this autofix suggestion is now outdated
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@krishnprakash krishnprakash marked this pull request as ready for review March 11, 2025 09:40
@krishnprakash krishnprakash merged commit 209c3eb into main Mar 11, 2025
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