merge revision(s) 0d89aedb734372bc35d8a569a992d13e86e7923e,a6f5f3cccda381ae332aaa6467f2644611371fb5,97cf290063ab940d08819cd96cbcca0ef6d50e4c: [Backport #17338]

	Assign TAG_NONE to ruby_tag_type instead of 0

	---
	 eval.c | 4 ++--
	 1 file changed, 2 insertions(+), 2 deletions(-)

	Also `eclass` loop can raise in `rb_obj_is_kind_of`

	---
	 eval.c | 2 +-
	 1 file changed, 1 insertion(+), 1 deletion(-)

	Copy va_list of exception classes

	The list is reused when an exception raised again after retrying
	in the rescue procedure.
	---
	 eval.c | 6 +++++-
	 1 file changed, 5 insertions(+), 1 deletion(-)

1 files changed, 8 insertions, 4 deletions

diff --git a/eval.c b/eval.c
index 55ac8b4eac..839518185a 100644
--- a/eval.c
+++ b/eval.c
@@ -1021,7 +1021,7 @@ rb_vrescue2(VALUE (* b_proc) (VALUE), VALUE data1,
     else if (result) {
 	/* escape from r_proc */
 	if (state == TAG_RETRY) {
-	    state = 0;
+	    state = TAG_NONE;
 	    ec->errinfo = Qnil;
 	    result = Qfalse;
 	    goto retry_entry;
@@ -1033,17 +1033,21 @@ rb_vrescue2(VALUE (* b_proc) (VALUE), VALUE data1,
 	if (state == TAG_RAISE) {
 	    int handle = FALSE;
 	    VALUE eclass;
+	    va_list ap;
 
-	    while ((eclass = va_arg(args, VALUE)) != 0) {
+	    result = Qnil;
+	    /* reuses args when raised again after retrying in r_proc */
+	    va_copy(ap, args);
+	    while ((eclass = va_arg(ap, VALUE)) != 0) {
 		if (rb_obj_is_kind_of(ec->errinfo, eclass)) {
 		    handle = TRUE;
 		    break;
 		}
 	    }
+	    va_end(ap);
 
 	    if (handle) {
-		result = Qnil;
-		state = 0;
+		state = TAG_NONE;
 		if (r_proc) {
 		    result = (*r_proc) (data2, ec->errinfo);
 		}