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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-struct/src/struct.c
+2 -1
View File
@@ -697,7 +697,8 @@ mrb_mruby_struct_gem_init(mrb_state* mrb)
{
struct RClass *st;
st = mrb_define_class(mrb, "Struct", mrb->object_class);
MRB_SET_INSTANCE_TT(st, MRB_TT_UNDEF);
MRB_SET_INSTANCE_TT(st, MRB_TT_STRUCT);
MRB_UNDEF_ALLOCATOR(st);
mrb_define_class_method(mrb, st, "new", mrb_struct_s_def, MRB_ARGS_ANY()); /* 15.2.18.3.1 */