Use the rb_sys_fail_str macro in signal.c

Let signal.c include "internal/error.h" explicitly to ensure that the
identifier rb_sys_fail_str in signal.c refers to the macro defined in
"internal/error.h" instead of the actual function.

That macro reads errno before evaluating its argument.  Without this
change, the rb_signo2signm(sig) expression in the "trap" function in
signal.c will overwrite the errno before the actual rb_sys_fail_str
function reads the errno.

1 files changed, 1 insertions, 0 deletions

diff --git a/signal.c b/signal.c
index b7a8dbe4dd..2487882fdd 100644
--- a/signal.c
+++ b/signal.c
@@ -36,6 +36,7 @@
 #include "debug_counter.h"
 #include "eval_intern.h"
 #include "internal.h"
+#include "internal/error.h"
 #include "internal/eval.h"
 #include "internal/sanitizers.h"
 #include "internal/signal.h"