Fix a potential double-free in ecpg.

diff --git a/src/interfaces/ecpg/preproc/pgc.l b/src/interfaces/ecpg/preproc/pgc.l
index a0a2d4a003872a01f602a0ee0d72fe7946cb5491..33822c9c56fe28c6e93950a00ae1bfb49d9f38ae 100644 (file)
--- a/src/interfaces/ecpg/preproc/pgc.l
+++ b/src/interfaces/ecpg/preproc/pgc.l
@@ -541,6 +541,7 @@ 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;