1 files changed, 13 insertions, 1 deletions
diff --git a/unit-tests/cond-cmp-numeric.mk b/unit-tests/cond-cmp-numeric.mk
index 67358ddaf86b..b1ec3e719d47 100644
--- a/unit-tests/cond-cmp-numeric.mk
+++ b/unit-tests/cond-cmp-numeric.mk
@@ -1,4 +1,4 @@
-# $NetBSD: cond-cmp-numeric.mk,v 1.3 2020/09/12 18:01:51 rillig Exp $
+# $NetBSD: cond-cmp-numeric.mk,v 1.4 2020/11/08 22:56:16 rillig Exp $
 #
 # Tests for numeric comparisons in .if conditions.
 
@@ -25,5 +25,17 @@
 .  error
 .endif
 
+# The parsing code in CondParser_Comparison only performs a light check on
+# whether the operator is valid, leaving the rest of the work to the
+# evaluation functions EvalCompareNum and EvalCompareStr.  Ensure that this
+# parse error is properly reported.
+#
+# XXX: The warning message does not mention the actual operator.
+.if 123 ! 123
+.  error
+.else
+.  error
+.endif
+
 all:
 	@:;