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-rw-r--r--test/Preprocessor/line-directive.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/test/Preprocessor/line-directive.c b/test/Preprocessor/line-directive.c
index 8877406adc..98f92f130c 100644
--- a/test/Preprocessor/line-directive.c
+++ b/test/Preprocessor/line-directive.c
@@ -70,3 +70,6 @@ typedef int w; // expected-error {{redefinition of typedef 'w' is invalid in C}
// PR3940
#line 0xf // expected-warning {{#line directive requires decimal line number}}
+#line 42U // expected-warning {{#line directive requires a simple digit sequence}}
+
+