[njs] XML: fixed exception handling.

[Dmitry Volyntsev]

details:   https://hg.nginx.org/njs/rev/632002c161b1
branches:  
changeset: 2216:632002c161b1
user:      Dmitry Volyntsev <xeioex at nginx.com>
date:      Wed Oct 04 15:00:02 2023 -0700
description:
XML: fixed exception handling.

This closes #675 issue on Github.

diffstat:

 external/njs_xml_module.c |  2 +-
 src/test/njs_unit_test.c  |  4 ++++
 2 files changed, 5 insertions(+), 1 deletions(-)

diffs (26 lines):

diff -r c0aad58cfadb -r 632002c161b1 external/njs_xml_module.c
--- a/external/njs_xml_module.c	Wed Oct 04 13:35:38 2023 -0700
+++ b/external/njs_xml_module.c	Wed Oct 04 15:00:02 2023 -0700
@@ -2000,7 +2000,7 @@ njs_xml_error(njs_vm_t *vm, njs_xml_doc_
                         err->int2);
     }
 
-    njs_vm_error(vm, "%s", p - errstr, errstr);
+    njs_vm_error(vm, "%*s", p - errstr, errstr);
 }
 
 
diff -r c0aad58cfadb -r 632002c161b1 src/test/njs_unit_test.c
--- a/src/test/njs_unit_test.c	Wed Oct 04 13:35:38 2023 -0700
+++ b/src/test/njs_unit_test.c	Wed Oct 04 15:00:02 2023 -0700
@@ -22035,6 +22035,10 @@ static njs_unit_test_t  njs_xml_test[] =
       njs_str("FOO,BAR,0,2") },
 
     { njs_str("const xml = require('xml');"
+              "let doc = xml.parse(`GARBAGE`)"),
+      njs_str("Error: failed to parse XML (libxml2: \"Start tag expected, '<' not found\" at 1:1)") },
+
+    { njs_str("const xml = require('xml');"
               "let doc = xml.parse(`<r><a></a>TEXT</r>`);"
               "doc.r.$text"),
       njs_str("TEXT") },