From 0d1ce1fb5fb4bcfff0dc24b567220af6ec6b93ab Mon Sep 17 00:00:00 2001
From: kristopher tate <kris.tate+github@gmail.com>
Date: Sun, 20 Jan 2019 16:57:13 +0900
Subject: [PATCH 1/2] src/analyze.cpp: return type entry for `ZigTypeIdPointer`
 if it points to `ZigTypeIdOpaque`

ref: ziglang/zig#1883
---
 src/analyze.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/analyze.cpp b/src/analyze.cpp
index 00eb38de9e..15370983fc 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -5751,6 +5751,13 @@ void eval_min_max_value(CodeGen *g, ZigType *type_entry, ConstExprValue *const_v
 }
 
 void render_const_val_ptr(CodeGen *g, Buf *buf, ConstExprValue *const_val, ZigType *type_entry) {
+    assert(type_entry->id == ZigTypeIdPointer);
+
+    if (type_entry->data.pointer.child_type->id == ZigTypeIdOpaque) {
+        buf_append_buf(buf, &type_entry->name);
+        return;
+    }
+
     switch (const_val->data.x_ptr.special) {
         case ConstPtrSpecialInvalid:
             zig_unreachable();

From 1357bc7430e48137b249c6930b4f03c48efa0f33 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Sun, 20 Jan 2019 14:09:17 -0500
Subject: [PATCH 2/2] add test case for previous commit

---
 test/compile_errors.zig | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/test/compile_errors.zig b/test/compile_errors.zig
index 880a96a322..d9603ba4ff 100644
--- a/test/compile_errors.zig
+++ b/test/compile_errors.zig
@@ -1,6 +1,15 @@
 const tests = @import("tests.zig");
 
 pub fn addCases(cases: *tests.CompileErrorContext) void {
+    cases.add(
+        "compile log a pointer to an opaque value",
+        \\export fn entry() void {
+        \\    @compileLog(@ptrCast(*const c_void, &entry));
+        \\}
+    ,
+        ".tmp_source.zig:2:5: error: found compile log statement",
+    );
+
     cases.add(
         "duplicate boolean switch value",
         \\comptime {