From 77b5e841dd3b4d069f33684c4a30e7d409d43f80 Mon Sep 17 00:00:00 2001
From: Christian Kamm <kamm@incasoftware.de>
Date: Wed, 1 Oct 2008 19:15:01 +0200
Subject: [PATCH] Make invalid compile time casts an error instead of
 asserting.

---
 gen/toir.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/gen/toir.cpp b/gen/toir.cpp
index 37fbcc2b..bb8950a7 100644
--- a/gen/toir.cpp
+++ b/gen/toir.cpp
@@ -829,10 +829,12 @@ LLConstant* CastExp::toConstElem(IRState* p)
     LOG_SCOPE;
 
     LLConstant* c = e1->toConstElem(p);
-    assert(isaPointer(c->getType()));
-
     const LLType* lltype = DtoType(type);
-    assert(isaPointer(lltype));
+
+    if(!isaPointer(c->getType()) || !isaPointer(lltype)) {
+        error("can only cast pointers to pointers at compile time, not %s to %s", type->toChars(), e1->type->toChars());
+        fatal();
+    }
 
     return llvm::ConstantExpr::getBitCast(c, lltype);
 }