From a307338e71825dcaf5661331f1fcfb95ac8c0b06 Mon Sep 17 00:00:00 2001
From: Vaibhav Thakkar <vaibhav.thakkar.22.12.99@gmail.com>
Date: Thu, 18 Jan 2024 16:04:27 +0100
Subject: [PATCH] Fix seg fault for catch(...)

fixes #86
---
 lib/Differentiator/StmtClone.cpp     | 2 ++
 test/FirstDerivative/DiffInterface.C | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/lib/Differentiator/StmtClone.cpp b/lib/Differentiator/StmtClone.cpp
index 4d9db2464..91afe9743 100644
--- a/lib/Differentiator/StmtClone.cpp
+++ b/lib/Differentiator/StmtClone.cpp
@@ -459,6 +459,8 @@ VarDecl* StmtClone::CloneDeclOrNull(VarDecl* Node)  {
 }
 
 Decl* StmtClone::CloneDecl(Decl* Node)  {
+  if (!Node)
+    return nullptr;
   // we support only exactly this class, so no visitor is needed (yet?)
   if (Node->getKind() == Decl::Var) {
     VarDecl* VD = static_cast<VarDecl*>(Node);
diff --git a/test/FirstDerivative/DiffInterface.C b/test/FirstDerivative/DiffInterface.C
index 13bd42394..dda26f136 100644
--- a/test/FirstDerivative/DiffInterface.C
+++ b/test/FirstDerivative/DiffInterface.C
@@ -75,6 +75,9 @@ int f_try_catch(int x)
   catch (int) {
     return 0;
   }
+  catch (...) {
+    return 1;
+  }
 
 // CHECK: int f_try_catch_darg0(int x) {
 // CHECK-NEXT:    int _d_x = 1;
@@ -82,6 +85,8 @@ int f_try_catch(int x)
 // CHECK-NEXT:        return x;
 // CHECK-NEXT:    } catch (int) {
 // CHECK-NEXT:        return 0;
+// CHECK-NEXT:    } catch (...) {
+// CHECK-NEXT:        return 1;
 // CHECK-NEXT:    }
 // CHECK-NEXT: }