From bb9a4ad6e903ad2f9c137bca56bdf2dd6fc65d03 Mon Sep 17 00:00:00 2001
From: LemonBoy <thatlemon@gmail.com>
Date: Wed, 16 Sep 2020 13:45:54 +0200
Subject: [PATCH] std: Fix {*} printing of non-pointer types

Fixes a regression introduced in #6246.
Adds a test to make sure this won't happen again.
---
 lib/std/fmt.zig | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/std/fmt.zig b/lib/std/fmt.zig
index 8d31733959..b18c9f2f44 100644
--- a/lib/std/fmt.zig
+++ b/lib/std/fmt.zig
@@ -327,7 +327,7 @@ pub fn formatType(
     max_depth: usize,
 ) @TypeOf(writer).Error!void {
     if (comptime std.mem.eql(u8, fmt, "*")) {
-        try writer.writeAll(@typeName(@typeInfo(@TypeOf(value)).Pointer.child));
+        try writer.writeAll(@typeName(std.meta.Child(@TypeOf(value))));
         try writer.writeAll("@");
         try formatInt(@ptrToInt(value), 16, false, FormatOptions{}, writer);
         return;
@@ -1246,6 +1246,10 @@ test "optional" {
         const value: ?i32 = null;
         try testFmt("optional: null\n", "optional: {}\n", .{value});
     }
+    {
+        const value = @intToPtr(?*i32, 0xf000d000);
+        try testFmt("optional: *i32@f000d000\n", "optional: {*}\n", .{value});
+    }
 }
 
 test "error" {