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Prohibit Class#allocate in a different way

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The method introduced by #5979 causes a fault by swapping classes.

```console
% bin/mruby -e 'Method = Proc; p Object.method(:inspect)'
zsh: segmentation fault (core dumped)  bin/mruby -e 'Method = Proc; p Object.method(:inspect)'
```

After applying this patch, a `TypeError` exception will be raised.

```console
% bin/mruby -e 'Method = Proc; p Object.method(:inspect)'
trace (most recent call last):
        [1] -e:1
-e:1:in method: allocation failure of Proc (TypeError)
```

However, if the `mrb_vtype` is the same object, the same care must still be taken as before.

```console
% bin/mruby -e 'Method = Binding; p method(:puts).eval("12345")'
trace (most recent call last):
        [1] -e:1
-e:1:in eval: wrong argument type nil (expected Proc) (TypeError)
```
This commit is contained in:
dearblue
2023-12-22 21:59:34 +09:00
parent fa75865a33
commit 8ecfacefca
11 changed files with 28 additions and 17 deletions
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mrbgems/mruby-complex/src/complex.c
+2 -1
View File
@@ -395,7 +395,8 @@ void mrb_mruby_complex_gem_init(mrb_state *mrb)
struct RClass *comp;
comp = mrb_define_class_id(mrb, MRB_SYM(Complex), mrb_class_get_id(mrb, MRB_SYM(Numeric)));
MRB_SET_INSTANCE_TT(comp, MRB_TT_UNDEF);
MRB_SET_INSTANCE_TT(comp, MRB_TT_COMPLEX);
MRB_UNDEF_ALLOCATOR(comp);
mrb_undef_class_method(mrb, comp, "new");
mrb_define_class_method(mrb, comp, "rectangular", complex_s_rect, MRB_ARGS_REQ(1)|MRB_ARGS_OPT(1));