From e9a6197a8ea38c228e2683d82cfbdbad8e7d912a Mon Sep 17 00:00:00 2001
From: Bogdan Romanyuk <65823030+wrongnull@users.noreply.github.com>
Date: Sun, 5 Nov 2023 13:36:06 +0300
Subject: [PATCH] Sema: fix error notes with wrong extern type

---
 src/Sema.zig                                       |  2 +-
 ...unction_with_unspecified_calling_convention.zig | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 test/cases/compile_errors/extern_function_with_unspecified_calling_convention.zig

diff --git a/src/Sema.zig b/src/Sema.zig
index a90e55550b..4f557d33ac 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -25573,7 +25573,7 @@ fn explainWhyTypeIsNotExtern(
                     try mod.errNoteNonLazy(src_loc, msg, "pointer to comptime-only type '{}'", .{pointee_ty.fmt(sema.mod)});
                     try sema.explainWhyTypeIsComptime(msg, src_loc, ty);
                 }
-                try sema.explainWhyTypeIsNotExtern(msg, src_loc, pointee_ty, position);
+                try sema.explainWhyTypeIsNotExtern(msg, src_loc, pointee_ty, .other);
             }
         },
         .Void => try mod.errNoteNonLazy(src_loc, msg, "'void' is a zero bit type; for C 'void' use 'anyopaque'", .{}),
diff --git a/test/cases/compile_errors/extern_function_with_unspecified_calling_convention.zig b/test/cases/compile_errors/extern_function_with_unspecified_calling_convention.zig
new file mode 100644
index 0000000000..ead75eb43e
--- /dev/null
+++ b/test/cases/compile_errors/extern_function_with_unspecified_calling_convention.zig
@@ -0,0 +1,14 @@
+const Foo = extern struct {
+    f: *const fn() void,
+};
+
+pub fn entry() void {
+    _ = (Foo{}).f;
+}
+
+// error
+// backend=stage2
+// target=native
+//
+// :2:8: error: extern structs cannot contain fields of type '*const fn () void'
+// :2:8: note: extern function must specify calling convention