Tweak previous patch to ensure edata->filename always gets initialized.

On a platform that isn't supplying __FILE__, previous coding would either
crash or give a stale result for the filename string.  Not sure how likely
that is, but the original code catered for it, so let's keep doing so.

diff --git a/src/backend/utils/error/elog.c b/src/backend/utils/error/elog.c
index 0131c06ba4dc083bed4792bac2140916e74634a6..d8d059f11c940ce3ef54e3677a4c52ddfcb87793 100644 (file)
--- a/src/backend/utils/error/elog.c
+++ b/src/backend/utils/error/elog.c
@@ -349,8 +349,10 @@ errstart(int elevel, const char *filename, int lineno,
 
        /* keep only base name, useful especially for vpath builds */
        slash = strrchr(filename, '/');
-       edata->filename = slash ? slash + 1 : filename;
+       if (slash)
+           filename = slash + 1;
    }
+   edata->filename = filename;
    edata->lineno = lineno;
    edata->funcname = funcname;
    /* the default text domain is the backend's */
@@ -1155,8 +1157,10 @@ elog_start(const char *filename, int lineno, const char *funcname)
 
        /* keep only base name, useful especially for vpath builds */
        slash = strrchr(filename, '/');
-       edata->filename = slash ? slash + 1 : filename;
+       if (slash)
+           filename = slash + 1;
    }
+   edata->filename = filename;
    edata->lineno = lineno;
    edata->funcname = funcname;
    /* errno is saved now so that error parameter eval can't change it */