1 files changed, 10 insertions, 0 deletions
diff --git a/tests/ui/macros/issue-106837.rs b/tests/ui/macros/issue-106837.rs
new file mode 100644
index 00000000000..7bbd3d68a90
--- /dev/null
+++ b/tests/ui/macros/issue-106837.rs
@@ -0,0 +1,10 @@
+fn main() {
+    concat!(-42);
+    concat!(-3.14);
+
+    concat!(-"hello");
+    //~^ ERROR expected a literal
+
+    concat!(--1);
+    //~^ ERROR expected a literal
+}