Fix a potential double-free in ecpg.

diff --git a/src/interfaces/ecpg/preproc/pgc.l b/src/interfaces/ecpg/preproc/pgc.l
index aab7ff495c303b8f5dcafcd25cfe4ac3f4394e29..5ac1ca8ae492b433e79e2821370a43c53c2b7024 100644 (file)
--- a/src/interfaces/ecpg/preproc/pgc.l
+++ b/src/interfaces/ecpg/preproc/pgc.l
@@ -566,6 +566,7 @@ cppline                     {space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
                                {
                                        addlit(yytext, yyleng);
                                        free(dolqstart);
+                                       dolqstart = NULL;
                                        BEGIN(SQL);
                                        base_yylval.str = mm_strdup(literalbuf);
                                        return DOLCONST;