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Do not recover in semantic errors

They don't need recover anything.

--- a/cc1/decl.c

+++ b/cc1/decl.c

@@ -731,9 +731,9 @@

 		case TQUALIFIER:

 		case SCLASS:

 			if (sym->token == TYPEIDEN)

-				error("function definition declared 'typedef'");

+				errorp("function definition declared 'typedef'");

 			if (sym->flags & ISDEFINED)

-				error("redefinition of '%s'", sym->name);

+				errorp("redefinition of '%s'", sym->name);

 			if (sym->flags & ISEXTERN) {

 				sym->flags &= ~ISEXTERN;

 				sym->flags |= ISGLOBAL;

--- a/cc1/expr.c

+++ b/cc1/expr.c

@@ -508,10 +508,10 @@

 			warn("comparision between different pointer types");

 		break;

 	default:

-		error("incompatibles type in comparision");

+		errorp("incompatibles type in comparision");

 	}

-	return node(op, lp->type, lp, rp);

+	return node(op, inttype, lp, rp);

 }

 static Node *

@@ -537,7 +537,7 @@

 		return pcompare(op, lp, rp);

 	default:

 	nocompat:

-		error("incompatibles type in comparision");

+		errorp("incompatibles type in comparision");

 	}

 	return simplify(op, inttype, lp, rp);