From f190d128021b08be58924c0b52e676ea1d3b3641 Mon Sep 17 00:00:00 2001
From: Wilson Snyder <wsnyder@wsnyder.org>
Date: Tue, 21 Mar 2017 18:22:32 -0400
Subject: [PATCH] Internals: Avoid coredump debugging bug1135.

---
 src/V3Inline.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/V3Inline.cpp b/src/V3Inline.cpp
index 87bba97ea..0c1a11ef1 100644
--- a/src/V3Inline.cpp
+++ b/src/V3Inline.cpp
@@ -510,6 +510,7 @@ private:
 		// delete it in later optimizations.
 		AstVar* pinOldVarp = pinp->modVarp();
 		AstVar* pinNewVarp = pinOldVarp->clonep();
+		if (!pinNewVarp) pinOldVarp->v3fatalSrc("Cloning failed");
 
 		AstNode* connectRefp = pinp->exprp();
 		if (!connectRefp->castConst() && !connectRefp->castVarRef()) {