Inconsistent expression evaluation result if type name conflicts with variable name

Bug type: Debugger

• OS and Version: Windows 10
• VS Code Version: 1.60.1
• C/C++ Extension Version: 1.6.0

Source C code to reproduce (compiled with cl.exe /Zi)

typedef struct foo {
    int a;
} foo_t;

foo_t foo;

int main(int argc, char *argv[])
{
    return foo.a;
}

Steps to reproduce the behavior:

1. Set a breakpoint in main
2. Start debugging
3. In debug console type foo twice, and the result is different

It seems that the evaluation result of foo for the second time is "class" instead of "data"
The first evaluation result:
foo
-> (C) {"command":"evaluate","arguments":{"expression":"foo","frameId":1000,"context":"repl"},"type":"request","seq":17}
<- (R) {"seq":711,"type":"response","request_seq":17,"success":true,"command":"evaluate","body":{"result":"{a=0 }","type":"foo","presentationHint":{"kind":"data","attributes":["readOnly","static"]},"variablesReference":1003,"evaluateResponseReference":1003}}

The second evaluation result:
-> (C) {"command":"evaluate","arguments":{"expression":"foo","frameId":1000,"context":"repl"},"type":"request","seq":20}
<- (R) {"seq":720,"type":"response","request_seq":20,"success":true,"command":"evaluate","body":{"result":"","presentationHint":{"kind":"class","attributes":["readOnly"]},"variablesReference":0,"evaluateResponseReference":1007}}

Inizia riproducendo il problema nella console di debug di VS Code con il codice sorgente C fornito e cl.exe /Zi, quindi esamina come vengono gestite le richieste di valutazione ripetute per foo. Confronta la prima e la seconda risposta, in particolare presentationHint e variablesReference; il lavoro è completato quando le valutazioni ripetute riportano sistematicamente i dati della variabile anziché una classe.