1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/format-no-std.rs b/src/test/ui/format-no-std.rs
new file mode 100644
index 000000000..c9b7651bf
--- /dev/null
+++ b/src/test/ui/format-no-std.rs
@@ -0,0 +1,28 @@
+// run-pass
+// ignore-emscripten no no_std executables
+
+#![feature(lang_items, start)]
+#![no_std]
+
+extern crate std as other;
+
+#[macro_use] extern crate alloc;
+
+use alloc::string::ToString;
+
+#[start]
+fn start(_argc: isize, _argv: *const *const u8) -> isize {
+    let s = format!("{}", 1_isize);
+    assert_eq!(s, "1".to_string());
+
+    let s = format!("test");
+    assert_eq!(s, "test".to_string());
+
+    let s = format!("{test}", test=3_isize);
+    assert_eq!(s, "3".to_string());
+
+    let s = format!("hello {}", "world");
+    assert_eq!(s, "hello world".to_string());
+
+    0
+}