Emit section IDs as bytes (#2803)

As described in the spec.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/wasm/wasm-binary.cpp b/src/wasm/wasm-binary.cpp
index 52e4b958d..b3314134d 100644
--- a/src/wasm/wasm-binary.cpp
+++ b/src/wasm/wasm-binary.cpp
@@ -73,7 +73,7 @@ void WasmBinaryWriter::write() {
   }
 
 #ifdef BUILD_LLVM_DWARF
-  // Update DWARF user sections after writing the data referred to by them
+  // Update DWARF user sections after writing the data they refer to
   // (function bodies), and before writing the user sections themselves.
   if (Debug::hasDWARFSections(*wasm)) {
     Debug::writeDWARFSections(*wasm, binaryLocations);
@@ -113,7 +113,7 @@ void WasmBinaryWriter::writeResizableLimits(Address initial,
 }
 
 template<typename T> int32_t WasmBinaryWriter::startSection(T code) {
-  o << U32LEB(code);
+  o << uint8_t(code);
   if (sourceMap) {
     sourceMapLocationsSizeAtSectionStart = sourceMapLocations.size();
   }
@@ -849,7 +849,7 @@ bool WasmBinaryBuilder::hasDWARFSections() {
   getInt32(); // version
   bool has = false;
   while (more()) {
-    uint32_t sectionCode = getU32LEB();
+    uint8_t sectionCode = getInt8();
     uint32_t payloadLen = getU32LEB();
     if (uint64_t(pos) + uint64_t(payloadLen) > input.size()) {
       throwError("Section extends beyond end of input");
@@ -885,7 +885,7 @@ void WasmBinaryBuilder::read() {
 
   // read sections until the end
   while (more()) {
-    uint32_t sectionCode = getU32LEB();
+    uint8_t sectionCode = getInt8();
     uint32_t payloadLen = getU32LEB();
     if (uint64_t(pos) + uint64_t(payloadLen) > input.size()) {
       throwError("Section extends beyond end of input");