An issue in the component hang.wasm of WebAssembly 1.0 causes an infinite loop.
### Describe the bug
Certain `hang.wasm` causes `wasm2c` an infinite loop. `wasm2c` tries to access a memory that is not permitted instead of providing `type mismatch` error for a while.

`wasm2c --version`: 1.0.32 (git~1.0.32-46-g47a589a1)

--------------------------

### Content of the file that causes the issue:

`vim hang.wasm`:
```
^@asm^A^@^@^@^A^G^A`^B{^?^A~^C^B^A^@^@^L^A^H^@^@^@#^@^@^@^@^@^?
        ^A^G^Aàÿÿ^O^?^K

```

`cat hang.wasm`: 
```
asm`{~
     #
	???
```
--------------------------

### Steps to reproduce:

Here is the file for the bug: 

[hang.wasm.txt](https://github.com/WebAssembly/wabt/files/11082815/hang.wasm.txt) (Remove .txt extension and save as .wasm)



* Install and build WABT
* Run wasm2c on the test file: `wasm2c hang.wasm`
* Observe the crash: It will be observed that `wasm2c` cannot finish the execution.
	`wasm-validate hang.wasm` output: `Segmentation fault`
	`gdb wasm-validate` and subsequent `run hang.wasm` output: 
```
	Program received signal SIGSEGV, Segmentation fault.
	0x000000000047d8c6 in std::vector<wabt::TypeChecker::Label, std::allocator<wabt::TypeChecker::Label> >::_M_realloc_insert<wabt::LabelType&, std::vector<wabt::Type, std::allocator<wabt::Type> > const&, std::vector<wabt::Type, std::allocator<wabt::Type> > const&, unsigned long> (this=this@entry=0x7fffffffdd10, __position=__position@entry=non-dereferenceable iterator for std::vector, __args=@0x7fffffffd8d8: 0, __args=@0x7fffffffd8d8: 0, __args=@0x7fffffffd8d8: 0, __args=@0x7fffffffd8d8: 0) at /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/stl_vector.h:1762
1762		return (__len < size() || __len > max_size()) ? max_size() : __len;
```
--------------------------

### Expected Behavior:
The expected output  should be an error like other related tools would provide as below. To cite an example, run `wasm2wat` on the test file:
`wasm2wat hang.wasm`:

 The output will be:
```
Expected_Behavior/hang.wasm:0000027: error: type mismatch in implicit return, expected [i64] but got []
```
--------------------------

### Additional information
A combination of afl-fuzz++4.03a and Wasmlike, an Xsmith-based random program generator produced the snippet of code that caused the crash. https://www.flux.utah.edu/project/xsmith
wasm2c hangs on certain inputs and cannot finish execution for a while.
This is a GitHub Issue
repo:wabt
owner:WebAssembly
Title : wasm2c hangs on certain inputs and cannot finish execution for a while.
Issue date:

--- start body ---
### Describe the bug
Certain `hang.wasm` causes `wasm2c` an infinite loop. `wasm2c` tries to access a memory that is not permitted instead of providing `type mismatch` error for a while.

`wasm2c --version`: 1.0.32 (git~1.0.32-46-g47a589a1)

--------------------------

### Content of the file that causes the issue:

`vim hang.wasm`:
```
^@asm^A^@^@^@^A^G^A`^B{^?^A~^C^B^A^@^@^L^A^H^@^@^@#^@^@^@^@^@^?
        ^A^G^Aàÿÿ^O^?^K

```

`cat hang.wasm`: 
```
asm`{~
     #
	???
```
--------------------------

### Steps to reproduce:

Here is the file for the bug: 

[hang.wasm.txt](https://github.com/WebAssembly/wabt/files/11082815/hang.wasm.txt) (Remove .txt extension and save as .wasm)



* Install and build WABT
* Run wasm2c on the test file: `wasm2c hang.wasm`
* Observe the crash: It will be observed that `wasm2c` cannot finish the execution.
	`wasm-validate hang.wasm` output: `Segmentation fault`
	`gdb wasm-validate` and subsequent `run hang.wasm` output: 
```
	Program received signal SIGSEGV, Segmentation fault.
	0x000000000047d8c6 in std::vector<wabt::TypeChecker::Label, std::allocator<wabt::TypeChecker::Label> >::_M_realloc_insert<wabt::LabelType&, std::vector<wabt::Type, std::allocator<wabt::Type> > const&, std::vector<wabt::Type, std::allocator<wabt::Type> > const&, unsigned long> (this=this@entry=0x7fffffffdd10, __position=__position@entry=non-dereferenceable iterator for std::vector, __args=@0x7fffffffd8d8: 0, __args=@0x7fffffffd8d8: 0, __args=@0x7fffffffd8d8: 0, __args=@0x7fffffffd8d8: 0) at /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/stl_vector.h:1762
1762		return (__len < size() || __len > max_size()) ? max_size() : __len;
```
--------------------------

### Expected Behavior:
The expected output  should be an error like other related tools would provide as below. To cite an example, run `wasm2wat` on the test file:
`wasm2wat hang.wasm`:

 The output will be:
```
Expected_Behavior/hang.wasm:0000027: error: type mismatch in implicit return, expected [i64] but got []
```
--------------------------

### Additional information
A combination of afl-fuzz++4.03a and Wasmlike, an Xsmith-based random program generator produced the snippet of code that caused the crash. https://www.flux.utah.edu/project/xsmith
--- end body ---
