handle the case of no function tables with aliasing function pointers

2 files changed, 5 insertions, 1 deletions

diff --git a/emscripten.py b/emscripten.py
index df51d840..236a2e4e 100755
--- a/emscripten.py
+++ b/emscripten.py
@@ -322,7 +322,7 @@ def emscript(infile, settings, outfile, libraries=[], compiler_engine=None,
       i += 2
     #print >> sys.stderr, 'function indexing', indexed, curr, sig
     forwarded_json['Functions']['indexedFunctions'][indexed] = curr # make sure not to modify this python object later - we use it in indexize
-  if alias: i = max(table_counters.values())
+  if alias: i = max(table_counters.values()) if len(table_counters) > 0 else 2 + 2*settings['RESERVED_FUNCTION_POINTERS']
   forwarded_json['Functions']['nextIndex'] = i # post phase can continue to add, in getIndex
 
   def split_32(x):
diff --git a/tests/runner.py b/tests/runner.py
index b2b1ff43..734dc51b 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -8513,6 +8513,10 @@ def process(filename):
         self.do_run(src, '''Finished up all reserved function pointers. Use a higher value for RESERVED_FUNCTION_POINTERS.''')
         generated = open('src.cpp.o.js').read()
         assert 'jsCall' not in generated
+        Settings.RESERVED_FUNCTION_POINTERS = 1
+
+        Settings.ALIASING_FUNCTION_POINTERS = 1
+        self.do_run(src, '''Hello 7 from JS!''')
 
     def test_scriptaclass(self):
         if self.emcc_args is None: return self.skip('requires emcc')