1 files changed, 14 insertions, 0 deletions
diff --git a/tests/ui/fmt/issue-89173.rs b/tests/ui/fmt/issue-89173.rs
new file mode 100644
index 000000000..fc99af408
--- /dev/null
+++ b/tests/ui/fmt/issue-89173.rs
@@ -0,0 +1,14 @@
+// Regression test for #89173: Make sure a helpful note is issued for
+// printf-style format strings using `*` to specify the width.
+
+fn main() {
+    let num = 0x0abcde;
+    let width = 6;
+    print!("%0*x", width, num);
+    //~^ ERROR: multiple unused formatting arguments
+    //~| NOTE: multiple missing formatting specifiers
+    //~| NOTE: argument never used
+    //~| NOTE: argument never used
+    //~| NOTE: format specifiers use curly braces, and you have to use a positional or named parameter for the width
+    //~| NOTE: printf formatting is not supported
+}