When filling in value initializations within an initializer list, be

sure to fill in the initialized member of a union when a member was
explicitly designated. Fixes PR5843.

llvm-svn: 91858

1 files changed, 17 insertions, 0 deletions

diff --git a/clang/test/Sema/designated-initializers.c b/clang/test/Sema/designated-initializers.c
index 9e2dc88b9a9..7e4ed6892ae 100644
--- a/clang/test/Sema/designated-initializers.c
+++ b/clang/test/Sema/designated-initializers.c
@@ -231,4 +231,21 @@ int crazy_Y[] = {
   [ 0 ? crazy_x : 4] = 1
 };
 
+// PR5843
+struct expr {
+  int nargs;
+  union {
+    unsigned long int num;
+    struct expr *args[3];
+  } val;
+};
 
+struct expr expr0 = { 
+  .nargs = 2,
+  .val = {
+    .args = { 
+      [0] = (struct expr *)0, 
+      [1] = (struct expr *)0 
+    }
+  }
+};