[JS API] Avoid trying to read the offset if segment is passive (#4750)

This avoids hitting an assertion.

2 files changed, 9 insertions, 3 deletions

diff --git a/test/binaryen.js/kitchen-sink.js b/test/binaryen.js/kitchen-sink.js
index d72ffcec0..ecfc73bff 100644
--- a/test/binaryen.js/kitchen-sink.js
+++ b/test/binaryen.js/kitchen-sink.js
@@ -1091,9 +1091,9 @@ function test_for_each() {
     assert(module.getExportByIndex(i) === exps[i]);
   }
 
-  var expected_offsets = [10, 125];
-  var expected_data = ["hello, world", "segment data 2"];
-  var expected_passive = [false, false];
+  var expected_offsets = [10, 125, null];
+  var expected_data = ["hello, world", "segment data 2", "hello, passive"];
+  var expected_passive = [false, false, true];
 
   var glos = [
     module.addGlobal("a-global", binaryen.i32, false, module.i32.const(expected_offsets[1])),
@@ -1115,6 +1115,11 @@ function test_for_each() {
       passive: expected_passive[1],
       offset: module.global.get("a-global"),
       data: expected_data[1].split('').map(function(x) { return x.charCodeAt(0) })
+    },
+    {
+      passive: expected_passive[2],
+      offset: expected_offsets[2],
+      data: expected_data[2].split('').map(function(x) { return x.charCodeAt(0) })
     }
   ], false);
   for (i = 0; i < module.getNumMemorySegments(); i++) {
diff --git a/test/binaryen.js/kitchen-sink.js.txt b/test/binaryen.js/kitchen-sink.js.txt
index 70be70e61..b45894c7a 100644
--- a/test/binaryen.js/kitchen-sink.js.txt
+++ b/test/binaryen.js/kitchen-sink.js.txt
@@ -4860,6 +4860,7 @@ sizeof Literal: 24
  (memory $0 1 256)
  (data (i32.const 10) "hello, world")
  (data (global.get $a-global) "segment data 2")
+ (data "hello, passive")
  (table $t0 1 funcref)
  (elem $e0 (i32.const 0) $fn0 $fn1 $fn2)
  (export "export0" (func $fn0))