Fix null pointer access in Ripper#initialize

In `rb_ruby_ripper_parser_allocate`, `r->p` is NULL between creating
`self` and `parser_params` assignment.  As GC can happen there, the
typed-data functions for it need to consider the case.

1 files changed, 3 insertions, 3 deletions

diff --git a/ext/ripper/ripper_init.c.tmpl b/ext/ripper/ripper_init.c.tmpl
index 32b8aa4398..98f260f8b1 100644
--- a/ext/ripper/ripper_init.c.tmpl
+++ b/ext/ripper/ripper_init.c.tmpl
@@ -25,14 +25,14 @@ static void
 ripper_parser_mark2(void *ptr)
 {
     struct ripper *r = (struct ripper*)ptr;
-    ripper_parser_mark(r->p);
+    if (r->p) ripper_parser_mark(r->p);
 }
 
 static void
 ripper_parser_free2(void *ptr)
 {
     struct ripper *r = (struct ripper*)ptr;
-    ripper_parser_free(r->p);
+    if (r->p) ripper_parser_free(r->p);
     xfree(r);
 }
 
@@ -40,7 +40,7 @@ static size_t
 ripper_parser_memsize2(const void *ptr)
 {
     struct ripper *r = (struct ripper*)ptr;
-    return ripper_parser_memsize(r->p);
+    return (r->p) ? ripper_parser_memsize(r->p) : 0;
 }
 
 static const rb_data_type_t parser_data_type = {