fix safe heap bug with memmove

2 files changed, 4 insertions, 1 deletions

diff --git a/src/library.js b/src/library.js
index 0504882c..fb36c4a5 100644
--- a/src/library.js
+++ b/src/library.js
@@ -3702,7 +3702,9 @@ LibraryManager.library = {
       src += num;
       dest += num;
       while (num--) {
-        {{{ makeSetValue('--dest', '0', makeGetValue('--src', '0', 'i8'), 'i8') }}};
+        dest--;
+        src--;
+        {{{ makeCopyValues('dest', 'src', 1, 'null') }}};
       }
     } else {
       {{{ makeCopyValues('dest', 'src', 'num', 'null') }}};
diff --git a/src/parseTools.js b/src/parseTools.js
index 75c827bc..0631e774 100644
--- a/src/parseTools.js
+++ b/src/parseTools.js
@@ -1121,6 +1121,7 @@ function makeCopyValues(dest, src, num, type, modifier) {
              '}';
     }
   } else { // USE_TYPED_ARRAYS == 2
+    // TODO: optimize, add unrolling, etc.
     var ret = '' +
       'var src, dest, stop, stop4;\n' +
       'src = ' + src + ';\n' +