1 files changed, 3 insertions, 0 deletions
diff --git a/lib/IR/DebugInfo.cpp b/lib/IR/DebugInfo.cpp
index 290dbe29c707..71b43942e882 100644
--- a/lib/IR/DebugInfo.cpp
+++ b/lib/IR/DebugInfo.cpp
@@ -525,12 +525,15 @@ bool DISubprogram::Verify() const {
         while ((IA = DL.getInlinedAt()))
           DL = DebugLoc::getFromDILocation(IA);
         DL.getScopeAndInlinedAt(Scope, IA);
+        if (!Scope)
+          return false;
         assert(!IA);
         while (!DIDescriptor(Scope).isSubprogram()) {
           DILexicalBlockFile D(Scope);
           Scope = D.isLexicalBlockFile()
                       ? D.getScope()
                       : DebugLoc::getFromDILexicalBlock(Scope).getScope();
+          assert(Scope && "lexical block file has no scope");
         }
         if (!DISubprogram(Scope).describes(F))
           return false;