crash on invalid typedef declarations

[nunoplopes]

Bugzilla Link	2403
Resolution	FIXED
Resolved on	Mar 12, 2010 00:57
Version	unspecified
OS	All

Extended Description

The following code crashes clang (in MergeTypeDefDecl(); although it doesn't make sense merging the decls..):

typedef struct {}
typedef __builtin_va_list __gnuc_va_list;

[lattner]

This works now:

t.c:3:1: error: cannot combine with previous 'typedef' declaration specifier
typedef __builtin_va_list __gnuc_va_list;int a() { return ({L:5;}); }
^
t.c:3:9: error: typedef redefinition with different types ('struct ' vs 'char ')
typedef __builtin_va_list __gnuc_va_list;int a() { return ({L:5;}); }
^
:4:15: error: previous definition is here
typedef char __builtin_va_list;
^
t.c:3:27: error: parse error
typedef __builtin_va_list __gnuc_va_list;int a() { return ({L:5;}); }
^
t.c:3:52: error: incompatible type returning 'void', expected 'int'
typedef __builtin_va_list __gnuc_va_list;int a() { return ({L:5;}); }
^ ~~~~~~~~