2 files changed, 4 insertions, 4 deletions
diff --git a/js/src/irregexp/RegExpParser.cpp b/js/src/irregexp/RegExpParser.cpp
index ccc6ae3eb..8bd88047a 100644
--- a/js/src/irregexp/RegExpParser.cpp
+++ b/js/src/irregexp/RegExpParser.cpp
@@ -243,10 +243,10 @@ RegExpParser<CharT>::RegExpParser(frontend::TokenStream& ts, LifoAlloc* alloc,
 
 template <typename CharT>
 RegExpTree*
-RegExpParser<CharT>::ReportError(unsigned errorNumber)
+RegExpParser<CharT>::ReportError(unsigned errorNumber, const char* param /* = nullptr */)
 {
     gc::AutoSuppressGC suppressGC(ts.context());
-    ts.reportError(errorNumber);
+    ts.reportError(errorNumber, param);
     return nullptr;
 }
 
@@ -350,7 +350,7 @@ RegExpParser<CharT>::ParseBracedHexEscape(widechar* value)
         }
         code = (code << 4) | d;
         if (code > unicode::NonBMPMax) {
-            ReportError(JSMSG_UNICODE_OVERFLOW);
+            ReportError(JSMSG_UNICODE_OVERFLOW, "regular expression");
             return false;
         }
         Advance();
diff --git a/js/src/irregexp/RegExpParser.h b/js/src/irregexp/RegExpParser.h
index b5228a86f..0a7e61858 100644
--- a/js/src/irregexp/RegExpParser.h
+++ b/js/src/irregexp/RegExpParser.h
@@ -211,7 +211,7 @@ class RegExpParser
     bool ParseBackReferenceIndex(int* index_out);
 
     bool ParseClassAtom(char16_t* char_class, widechar *value);
-    RegExpTree* ReportError(unsigned errorNumber);
+    RegExpTree* ReportError(unsigned errorNumber, const char* param = nullptr);
     void Advance();
     void Advance(int dist) {
         next_pos_ += dist - 1;