Fix output of initializer list metadata

* Fix output of initializer list metadata

Turns out trailing commas aren't valid JSON

2 files changed, 7 insertions, 2 deletions

diff --git a/src/s2wasm.h b/src/s2wasm.h
index c2e8c77a0..701d86f18 100644
--- a/src/s2wasm.h
+++ b/src/s2wasm.h
@@ -1443,7 +1443,12 @@ public:
     o << "\"staticBump\": " << (nextStatic - globalBase) << ", ";
 
     o << "\"initializers\": [";
-    for (const auto& func : initializerFunctions) o << "\"" << func.c_str() << "\", ";
+    first = true;
+    for (const auto& func : initializerFunctions) {
+      if (first) first = false;
+      else o << ", ";
+      o << "\"" << func.c_str() << "\"";
+    }
     o << "]";
 
     o << " }";
diff --git a/test/dot_s/initializers.wast b/test/dot_s/initializers.wast
index 5360753a1..4d64f9ffc 100644
--- a/test/dot_s/initializers.wast
+++ b/test/dot_s/initializers.wast
@@ -12,4 +12,4 @@
     (return)
   )
 )
-;; METADATA: { "asmConsts": {},"staticBump": 12, "initializers": ["main", "f2", ] }
+;; METADATA: { "asmConsts": {},"staticBump": 12, "initializers": ["main", "f2"] }