Fix a potential double-free in ecpg.

diff --git a/src/interfaces/ecpg/preproc/pgc.l b/src/interfaces/ecpg/preproc/pgc.l
index 6b58dd5afe71263337fe67bdef316400e437c069..7b2bfdccc9030ae507c9dd63c56209067514355b 100644 (file)
--- a/src/interfaces/ecpg/preproc/pgc.l
+++ b/src/interfaces/ecpg/preproc/pgc.l
@@ -565,6 +565,7 @@ 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;