From 326e043a64b37a6c0859ced234689f1dff8d6bee Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Wed, 12 Apr 2017 10:02:40 +0900
Subject: Exceptions may be raised in yyparse(); fix #3600

---
 mrbgems/mruby-compiler/core/parse.y | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

(limited to 'mrbgems/mruby-compiler/core')

diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index 226701b52..3e4e146f0 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -5514,10 +5514,11 @@ void mrb_parser_dump(mrb_state *mrb, node *tree, int offset);
 MRB_API void
 mrb_parser_parse(parser_state *p, mrbc_context *c)
 {
-  struct mrb_jmpbuf buf;
-  p->jmp = &buf;
+  struct mrb_jmpbuf buf1;
+  p->jmp = &buf1;
 
   MRB_TRY(p->jmp) {
+    int n;
 
     p->cmd_start = TRUE;
     p->in_def = p->in_single = 0;
@@ -5525,7 +5526,25 @@ mrb_parser_parse(parser_state *p, mrbc_context *c)
     p->lex_strterm = NULL;
 
     parser_init_cxt(p, c);
-    if (yyparse(p) != 0 || p->nerr > 0) {
+
+    if (p->mrb->jmp) {
+      n = yyparse(p);
+    }
+    else {
+      struct mrb_jmpbuf buf2;
+
+      p->mrb->jmp = &buf2;
+      MRB_TRY(p->mrb->jmp) {
+        n = yyparse(p);
+      }
+      MRB_CATCH(p->mrb->jmp) {
+        p->nerr++;
+        mrb_p(p->mrb, mrb_obj_value(p->mrb->exc));
+      }
+      MRB_END_EXC(p->mrb->jmp);
+      p->mrb->jmp = 0;
+    }
+    if (n != 0 || p->nerr > 0) {
       p->tree = 0;
       return;
     }
@@ -5536,7 +5555,6 @@ mrb_parser_parse(parser_state *p, mrbc_context *c)
     if (c && c->dump_result) {
       mrb_parser_dump(p->mrb, p->tree, 0);
     }
-
   }
   MRB_CATCH(p->jmp) {
     yyerror(p, "memory allocation error");
-- 
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