Fix per-instance Regexp timeout (#6621)

Fix per-instance Regexp timeout

This makes it follow what was decided in [Bug #19055]:

* `Regexp.new(str, timeout: nil)` should respect the global timeout
* `Regexp.new(str, timeout: huge_val)` should use the maximum value that
  can be represented in the internal representation
* `Regexp.new(str, timeout: 0 or negative value)` should raise an error

1 files changed, 1 insertions, 0 deletions

diff --git a/hrtime.h b/hrtime.h
index 80aff5deb3..7ed4e6b04c 100644
--- a/hrtime.h
+++ b/hrtime.h
@@ -206,6 +206,7 @@ double2hrtime(rb_hrtime_t *hrt, double d)
     const double TIMESPEC_SEC_MAX_PLUS_ONE = 2.0 * (TIMESPEC_SEC_MAX_as_double / 2.0 + 1.0);
 
     if (TIMESPEC_SEC_MAX_PLUS_ONE <= d) {
+        *hrt = RB_HRTIME_MAX;
         return NULL;
     }
     else if (d <= 0) {