[nginx] Core: strengthen configuration syntax checker.

[Valentin Bartenev]

details:   http://hg.nginx.org/nginx/rev/ea41bba49e8a
branches:  
changeset: 5227:ea41bba49e8a
user:      Valentin Bartenev <vbart at nginx.com>
date:      Thu May 23 20:30:27 2013 +0400
description:
Core: strengthen configuration syntax checker.

It is now a syntax error if tokens passed to a custom configuration
handler are terminated by "{".

The following incorrect configuration is now properly rejected:

  map $v $v2 {
      a b {
      c d {
      e f {
  }

diffstat:

 src/core/ngx_conf_file.c |  5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diffs (15 lines):

diff -r a30ea5c6451d -r ea41bba49e8a src/core/ngx_conf_file.c
--- a/src/core/ngx_conf_file.c	Thu May 23 16:26:10 2013 +0400
+++ b/src/core/ngx_conf_file.c	Thu May 23 20:30:27 2013 +0400
@@ -225,6 +225,11 @@ ngx_conf_parse(ngx_conf_t *cf, ngx_str_t
              * "types { ... }" directive
              */
 
+            if (rc == NGX_CONF_BLOCK_START) {
+                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unexpected \"{\"");
+                goto failed;
+            }
+
             rv = (*cf->handler)(cf, NULL, cf->handler_conf);
             if (rv == NGX_CONF_OK) {
                 continue;