[RFC] infinite loop in free_preprocessor_line()

[Alexey Dobriyan]

While running if-2.c from gcc testsuite sparse goes into infinite loop in
free_preprocessor_line().

Trimmed down test-case is

        #if 1
        #if

(two lines)

--- a/pre-process.c
+++ b/pre-process.c
@@ -763,11 +763,11 @@ out:
 
 static int free_preprocessor_line(struct token *token)
 {
-       do {
+       while (token_type(token) != TOKEN_EOF) {
                struct token *free = token;
                token = token->next;
                __free_token(free);
-       } while (token_type(token) != TOKEN_EOF);
+       };
        return 1;
 }
 

-
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