From d353d5aef8bfc5c701ab8958751ef74f6704342b Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Tue, 18 Sep 2018 09:49:57 -0400
Subject: [PATCH] fix @bytesToSlice on a packed struct

closes #1551
---
 src/ir.cpp          |  3 +++
 test/cases/eval.zig | 10 ++++++++++
 2 files changed, 13 insertions(+)

diff --git a/src/ir.cpp b/src/ir.cpp
index 0cb09df011..5da0008e03 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -18516,6 +18516,9 @@ static ZigType *ir_analyze_instruction_from_bytes(IrAnalyze *ira, IrInstructionF
         src_ptr_align = get_abi_alignment(ira->codegen, target->value.type);
     }
 
+    if ((err = type_resolve(ira->codegen, dest_child_type, ResolveStatusSizeKnown)))
+        return ira->codegen->builtin_types.entry_invalid;
+
     ZigType *dest_ptr_type = get_pointer_to_type_extra(ira->codegen, dest_child_type,
             src_ptr_const, src_ptr_volatile, PtrLenUnknown,
             src_ptr_align, 0, 0);
diff --git a/test/cases/eval.zig b/test/cases/eval.zig
index 5f456364a5..acb3da72c7 100644
--- a/test/cases/eval.zig
+++ b/test/cases/eval.zig
@@ -700,3 +700,13 @@ test "@intCast to a u0" {
     var y: u0 = @intCast(u0, x);
     assert(y == 0);
 }
+
+test "@bytesToslice on a packed struct" {
+    const F = packed struct {
+        a: u8,
+    };
+
+    var b = [1]u8{9};
+    var f = @bytesToSlice(F, b);
+    assert(f[0].a == 9);
+}