vm: fix NaN strict equality tests

A performance shortcut in `ucv_is_equal()` incorrectly led to `NaN === NaN`
being true. Fix the issue by only comparing pointers when the involved
types are not doubles.

Due to fixing `NaN !== NaN`, the `uniq()` function now requires a special
case to treat multiple NaNs equal for the sake of generating an array of
unique values.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/types.c b/types.c
index 5ea1180..dac0efb 100644
--- a/types.c
+++ b/types.c
@@ -1764,7 +1764,7 @@ ucv_is_equal(uc_value_t *uv1, uc_value_t *uv2)
 	if (t1 != t2)
 		return false;
 
-	if (uv1 == uv2)
+	if (t1 != UC_DOUBLE && uv1 == uv2)
 		return true;
 
 	switch (t1) {