From ff6d563b0455aea51775e6906f5e7f0dd67b7127 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Fri, 21 Jun 2019 17:49:54 -0400
Subject: fix implicit cast to optional to error union to return result loc

---
 src/analyze.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/analyze.cpp')

diff --git a/src/analyze.cpp b/src/analyze.cpp
index d048dd9770..85e390f2e0 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -4512,6 +4512,8 @@ bool fn_eval_cacheable(Scope *scope, ZigType *return_type) {
             ScopeVarDecl *var_scope = (ScopeVarDecl *)scope;
             if (type_is_invalid(var_scope->var->var_type))
                 return false;
+            if (var_scope->var->const_value->special == ConstValSpecialUndef)
+                return false;
             if (can_mutate_comptime_var_state(var_scope->var->const_value))
                 return false;
         } else if (scope->id == ScopeIdFnDef) {
-- 
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