Move "special consts" so `Qundef` and `Qnil` differ just 1 bit

1 files changed, 1 insertions, 0 deletions

diff --git a/ruby.c b/ruby.c
index 68da778ea6..640386fbda 100644
--- a/ruby.c
+++ b/ruby.c
@@ -64,6 +64,7 @@
 
 #define singlebit_only_p(x) !((x) & ((x)-1))
 STATIC_ASSERT(Qnil_1bit_from_Qfalse, singlebit_only_p(Qnil^Qfalse));
+STATIC_ASSERT(Qundef_1bit_from_Qnil, singlebit_only_p(Qundef^Qnil));
 
 #ifndef MAXPATHLEN
 # define MAXPATHLEN 1024