Fix a potential double-free in ecpg.

diff --git a/src/interfaces/ecpg/preproc/pgc.l b/src/interfaces/ecpg/preproc/pgc.l
index 283343d822844d6d47ceaa5ac29555bccf5e1775..3601544da20d29c04cedcfe02f6b6198353b917a 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})((\/\*[^*/]*\*+
                                {
                                        addlit(yytext, yyleng);
                                        free(dolqstart);
+                                       dolqstart = NULL;
                                        BEGIN(SQL);
                                        base_yylval.str = mm_strdup(literalbuf);
                                        return DOLCONST;