Handle missing complex field start characters

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/docx/body-reader.js b/lib/docx/body-reader.js
index 2ec9d0d..2c2a741 100644
--- a/lib/docx/body-reader.js
+++ b/lib/docx/body-reader.js
@@ -169,6 +169,12 @@ function BodyReader(options) {
             complexFieldStack.push({type: "begin", fldChar: element});
             currentInstrText = [];
         } else if (type === "end") {
+            if (complexFieldStack.length === 0) {
+                return emptyResultWithMessages([warning(
+                    "ignoring complex field end character without corresponding start character"
+                )]);
+            }
+
             var complexFieldEnd = complexFieldStack.pop();
             if (complexFieldEnd.type === "begin") {
                 complexFieldEnd = parseCurrentInstrText(complexFieldEnd);
@@ -179,6 +185,12 @@ function BodyReader(options) {
                 }));
             }
         } else if (type === "separate") {
+            if (complexFieldStack.length === 0) {
+                return emptyResultWithMessages([warning(
+                    "ignoring complex field separator character without corresponding start character"
+                )]);
+            }
+
             var complexFieldSeparate = complexFieldStack.pop();
             var complexField = parseCurrentInstrText(complexFieldSeparate);
             complexFieldStack.push(complexField);