From cdc12edb4c18aadad2e24d1f988a30bcb17964bb Mon Sep 17 00:00:00 2001
From: mbartlett21 <mjmouse9999@gmail.com>
Date: Tue, 17 May 2022 07:24:47 +0000
Subject: [PATCH] Add a test for fn pointer calls in consts

---
 src/test/ui/consts/const-fn-ptr.rs     | 16 ++++++++++++++++
 src/test/ui/consts/const-fn-ptr.stderr | 20 ++++++++++++++++++++
 2 files changed, 36 insertions(+)
 create mode 100644 src/test/ui/consts/const-fn-ptr.rs
 create mode 100644 src/test/ui/consts/const-fn-ptr.stderr

diff --git a/src/test/ui/consts/const-fn-ptr.rs b/src/test/ui/consts/const-fn-ptr.rs
new file mode 100644
index 000000000000..b1befdf06af2
--- /dev/null
+++ b/src/test/ui/consts/const-fn-ptr.rs
@@ -0,0 +1,16 @@
+const fn make_fn_ptr() -> fn() {
+    || {}
+}
+
+static STAT: () = make_fn_ptr()();
+//~^ ERROR function pointer
+
+const CONST: () = make_fn_ptr()();
+//~^ ERROR function pointer
+
+const fn call_ptr() {
+    make_fn_ptr()();
+    //~^ ERROR function pointer
+}
+
+fn main() {}
diff --git a/src/test/ui/consts/const-fn-ptr.stderr b/src/test/ui/consts/const-fn-ptr.stderr
new file mode 100644
index 000000000000..84b02a25ec8c
--- /dev/null
+++ b/src/test/ui/consts/const-fn-ptr.stderr
@@ -0,0 +1,20 @@
+error: function pointer calls are not allowed in statics
+  --> $DIR/const-fn-ptr.rs:5:19
+   |
+LL | static STAT: () = make_fn_ptr()();
+   |                   ^^^^^^^^^^^^^^^
+
+error: function pointer calls are not allowed in constants
+  --> $DIR/const-fn-ptr.rs:8:19
+   |
+LL | const CONST: () = make_fn_ptr()();
+   |                   ^^^^^^^^^^^^^^^
+
+error: function pointer calls are not allowed in constant functions
+  --> $DIR/const-fn-ptr.rs:12:5
+   |
+LL |     make_fn_ptr()();
+   |     ^^^^^^^^^^^^^^^
+
+error: aborting due to 3 previous errors
+