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-rw-r--r--src/library.js4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/library.js b/src/library.js
index 18f4702c..51921541 100644
--- a/src/library.js
+++ b/src/library.js
@@ -2821,7 +2821,9 @@ LibraryManager.library = {
} else if (next == {{{ charCode('x') }}} || next == {{{ charCode('X') }}}) {
prefix = flagAlternative ? '0x' : '';
#if PRECISE_I64_MATH
- if (argSize == 8 && i64Math) argText = (origArg[1]>>>0).toString(16) + (origArg[0]>>>0).toString(16); else
+ if (argSize == 8 && i64Math) {
+ argText = (origArg[1] ? (origArg[1]>>>0).toString(16) : '') + (origArg[0]>>>0).toString(16);
+ } else
#endif
if (currArg < 0) {
// Represent negative numbers in hex as 2's complement.