1 files changed, 1 insertions, 0 deletions
diff --git a/emcc b/emcc
index 491e8dff..2c3033aa 100755
--- a/emcc
+++ b/emcc
@@ -1217,6 +1217,7 @@ try:
     assert not split_js_file, '--split-js is deprecated and not supported in fastcomp'
     assert not bind, 'embind not supported in fastcomp yet'
     assert shared.Settings.MAX_SETJMPS == 20, 'changing MAX_SETJMPS is not supported in fastcomp yet'
+    assert shared.Settings.INIT_HEAP == 0, 'HEAP_INIT is not supported in fastcomp (and should never be needed except for debugging)'
     if jcache:
       logging.warning('jcache is not supported in fastcomp (you should not need it anyhow), disabling')
       jcache = False