[analyzer] Fix dumping for SymbolConjured conjured at no particular statement.

llvm-svn: 344944

2 files changed, 22 insertions, 4 deletions

diff --git a/clang/lib/StaticAnalyzer/Core/SymbolManager.cpp b/clang/lib/StaticAnalyzer/Core/SymbolManager.cpp
index ec1224e52b9..4129191dd82 100644
--- a/clang/lib/StaticAnalyzer/Core/SymbolManager.cpp
+++ b/clang/lib/StaticAnalyzer/Core/SymbolManager.cpp
@@ -83,10 +83,13 @@ void SymbolCast::dumpToStream(raw_ostream &os) const {
 }
 
 void SymbolConjured::dumpToStream(raw_ostream &os) const {
-  os << "conj_$" << getSymbolID() << '{' << T.getAsString()
-    << ", LC" << LCtx->getID() << ", S" << S->getID(
-      LCtx->getDecl()->getASTContext()) << ", #" << Count
-    << '}';
+  os << "conj_$" << getSymbolID() << '{' << T.getAsString() << ", LC"
+     << LCtx->getID();
+  if (S)
+    os << ", S" << S->getID(LCtx->getDecl()->getASTContext());
+  else
+    os << ", no stmt";
+  os << ", #" << Count << '}';
 }
 
 void SymbolDerived::dumpToStream(raw_ostream &os) const {
diff --git a/clang/test/Analysis/dump_egraph.cpp b/clang/test/Analysis/dump_egraph.cpp
new file mode 100644
index 00000000000..74133c54014
--- /dev/null
+++ b/clang/test/Analysis/dump_egraph.cpp
@@ -0,0 +1,15 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-dump-egraph=%t.dot %s
+// RUN: cat %t.dot | FileCheck %s
+// REQUIRES: asserts
+
+
+struct S {
+  ~S();
+};
+
+void foo() {
+  // Test that dumping symbols conjured on null statements doesn't crash.
+  S s;
+}
+
+// CHECK: conj_$0\{int, LC1, no stmt, #1\}