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-rw-r--r--properties.y5
1 files changed, 5 insertions, 0 deletions
diff --git a/properties.y b/properties.y
index 9785e1c..0f8c8d4 100644
--- a/properties.y
+++ b/properties.y
@@ -46,6 +46,11 @@ extern FILE *yyin;
void
properties_load(FILE *file)
{
+ if (file == NULL) {
+ fprintf(stderr, "No file to read.\n");
+ exit(1);
+ }
+
yyin = file;
do {