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-rw-r--r--tests/ui/macros/issue-106837.rs10
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 000000000..7bbd3d68a
--- /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
+}