From 1ec5c6fdf5fc62c182fcd32d502dca4ce5ac6771 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Arne=20D=C3=B6ring?= <arne.doering@gmx.net>
Date: Tue, 30 Oct 2018 16:41:06 +0100
Subject: [PATCH] Sizeof alignof fixes (#9568)

fixes #9545
---
 compiler/sizealignoffsetimpl.nim |  2 +-
 tests/misc/tsizeof.nim           | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/compiler/sizealignoffsetimpl.nim b/compiler/sizealignoffsetimpl.nim
index dcff992a18..573b27094c 100644
--- a/compiler/sizealignoffsetimpl.nim
+++ b/compiler/sizealignoffsetimpl.nim
@@ -122,7 +122,7 @@ proc computeObjectOffsetsFoldFunction(conf: ConfigRef; n: PNode, initialOffset:
     let size = n.sym.typ.size
     let align = n.sym.typ.align
     result.align = align
-    if initialOffset == szUnknownSize:
+    if initialOffset == szUnknownSize or size == szUnknownSize:
       n.sym.offset = szUnknownSize
       result.offset = szUnknownSize
     else:
diff --git a/tests/misc/tsizeof.nim b/tests/misc/tsizeof.nim
index ecdd44fcaa..2830a545f4 100644
--- a/tests/misc/tsizeof.nim
+++ b/tests/misc/tsizeof.nim
@@ -350,5 +350,19 @@ testinstance:
 
   main()
 
+{.emit: """/*TYPESECTION*/
+typedef struct{
+  float a; float b;
+} Foo;
+""".}
+
+type
+  Foo {.importc.} = object
+
+  Bar = object
+    b: byte
+    foo: Foo
+
+assert sizeof(Bar) == 12
 
 echo "OK"