Prevent Fiber#initialize to be called twice; fix #3705

47bd44fc · Yukihiro "Matz" Matsumoto · b298e241 · 47bd44fc
Commit 47bd44fc authored Jun 15, 2017 by Yukihiro "Matz" Matsumoto
Hide whitespace changes
Inline Side-by-side

Showing with 3 additions and 0 deletions

mrbgems/mruby-fiber/src/fiber.c mrbgems/mruby-fiber/src/fiber.c +3 -0

No files found.
--- a/mrbgems/mruby-fiber/src/fiber.c
+++ b/mrbgems/mruby-fiber/src/fiber.c
@@ -74,6 +74,9 @@ fiber_init(mrb_state *mrb, mrb_value self)

  mrb_get_args(mrb, "&", &blk);

+  if (f->cxt) {
+    mrb_raise(mrb, E_RUNTIME_ERROR, "cannot initialize twice");
+  }
  if (mrb_nil_p(blk)) {
    mrb_raise(mrb, E_ARGUMENT_ERROR, "tried to create Fiber object without a block");
  }