3 files changed, 20 insertions, 2 deletions
diff --git a/clang/lib/Frontend/PCHReaderStmt.cpp b/clang/lib/Frontend/PCHReaderStmt.cpp
index d0963880616..eccb53bf818 100644
--- a/clang/lib/Frontend/PCHReaderStmt.cpp
+++ b/clang/lib/Frontend/PCHReaderStmt.cpp
@@ -1133,6 +1133,5 @@ Stmt *PCHReader::ReadStmt(llvm::BitstreamCursor &Cursor) {
     StmtStack.push_back(S);
   }
   assert(StmtStack.size() == 1 && "Extra expressions on stack!");
-  SwitchCaseStmts.clear();
   return StmtStack.back();
 }
diff --git a/clang/lib/Frontend/PCHWriterStmt.cpp b/clang/lib/Frontend/PCHWriterStmt.cpp
index c63c03c8823..5235326e9ff 100644
--- a/clang/lib/Frontend/PCHWriterStmt.cpp
+++ b/clang/lib/Frontend/PCHWriterStmt.cpp
@@ -826,5 +826,4 @@ void PCHWriter::FlushStmts() {
   }
   
   StmtsToEmit.clear();
-  SwitchCaseIDs.clear();
 }
diff --git a/clang/test/PCH/pr4489.c b/clang/test/PCH/pr4489.c
new file mode 100644
index 00000000000..696da5bbb48
--- /dev/null
+++ b/clang/test/PCH/pr4489.c
@@ -0,0 +1,20 @@
+// RUN: clang -x c-header -o %t.pch %s &&
+// RUN: clang -include %t -x c /dev/null -emit-llvm -S -o -
+// PR 4489: Crash with PCH
+
+typedef struct _IO_FILE FILE;
+extern int fprintf (struct _IO_FILE *__restrict __stream,
+                    __const char *__restrict __format, ...);
+
+int x(void)
+{
+  switch (1) {
+    case 2: ;
+      int y = 0;
+  }
+}
+
+void y(void) {
+  extern char z;
+  fprintf (0, "a");
+}
+\ No newline at end of file