Fix a potential double-free in ecpg.

diff --git a/src/interfaces/ecpg/preproc/pgc.l b/src/interfaces/ecpg/preproc/pgc.l
index 3aa63ae2c135e84bfe483f38a2dd4e6e8195d7c1..763b2de3e7efcabbb54b6f09309696928a6b76a9 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;