From e027965176499b578b297e8bead32a0400d07a6d Mon Sep 17 00:00:00 2001
From: WebFreak001 <gh@webfreak.org>
Date: Mon, 7 Mar 2022 19:04:29 +0100
Subject: [PATCH] fix null pointer access in unused.d

---
 src/dscanner/analysis/unused.d          | 3 ++-
 src/dscanner/analysis/unused_variable.d | 6 ++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/dscanner/analysis/unused.d b/src/dscanner/analysis/unused.d
index 890a764..9934a37 100644
--- a/src/dscanner/analysis/unused.d
+++ b/src/dscanner/analysis/unused.d
@@ -434,7 +434,8 @@ abstract class UnusedStorageCheck : UnusedIdentifierCheck
 		// enum name = "abc";
 		// __traits(hasMember, S, name);
 		ignoreDeclarations++;
-		traitsExp.templateArgumentList.accept(this);
+		if (traitsExp.templateArgumentList)
+			traitsExp.templateArgumentList.accept(this);
 		ignoreDeclarations--;
 	}
 
diff --git a/src/dscanner/analysis/unused_variable.d b/src/dscanner/analysis/unused_variable.d
index e5e67ee..c3b3689 100644
--- a/src/dscanner/analysis/unused_variable.d
+++ b/src/dscanner/analysis/unused_variable.d
@@ -117,6 +117,12 @@ final class UnusedVariableCheck : UnusedStorageCheck
 		__traits(compiles, { int i = 2; });
 	}
 
+	// segfault with null templateArgumentList
+	void nullTest()
+	{
+		__traits(isPOD);
+	}
+
 	}c, sac);
 	stderr.writeln("Unittest for UnusedVariableCheck passed.");
 }