maybe fixes

src/core/ext/transport/chttp2/transport/hpack_parser.cc

@@ -1559,7 +1559,7 @@ void HPackParser::QueueBufferToParse(const grpc_slice& slice) {
   queued_slices_.push_back(grpc_slice_ref_internal(slice));
 }
 
-grpc_error_handle HPackParser::FinishFrame() {
+grpc_error_handle HPackParser::Parse() {
   grpc_error_handle error = GRPC_ERROR_NONE;
   for (const auto& slice : queued_slices_) {
     error = Parse(slice);
@@ -1569,11 +1569,12 @@ grpc_error_handle HPackParser::FinishFrame() {
     grpc_slice_unref_internal(slice);
   }
   queued_slices_.clear();
+  return error;
+}
 
+void HPackParser::FinishFrame() {
   sink_ = Sink();
   dynamic_table_updates_allowed_ = 2;
-
-  return error;
 }
 
 grpc_error_handle HPackParser::Parse(const grpc_slice& slice) {
@@ -1645,13 +1646,15 @@ grpc_error_handle grpc_chttp2_header_parser_parse(void* hpack_parser,
     s->stats.incoming.header_bytes += GRPC_SLICE_LENGTH(slice);
   }
   parser->QueueBufferToParse(slice);
-  if (!is_last || !parser->is_boundary()) {
+  if (!is_last) {
     return GRPC_ERROR_NONE;
   }
-  grpc_error_handle error = parser->FinishFrame();
+  if (parser->is_boundary()) {
+    grpc_error_handle error = parser->Parse();
     if (error != GRPC_ERROR_NONE) {
       return error;
     }
+  }
   /* need to check for null stream: this can occur if we receive an invalid
       stream id on a header */
   if (s != nullptr) {
@@ -1682,5 +1685,6 @@ grpc_error_handle grpc_chttp2_header_parser_parse(void* hpack_parser,
       grpc_chttp2_mark_stream_closed(t, s, true, false, GRPC_ERROR_NONE);
     }
   }
+  parser->FinishFrame();
   return GRPC_ERROR_NONE;
 }

src/core/ext/transport/chttp2/transport/hpack_parser.h

@@ -46,7 +46,8 @@ class HPackParser {
   void BeginFrame(Sink sink, Boundary boundary, Priority priority);
   void ResetSink(Sink sink) { sink_ = std::move(sink); }
   void QueueBufferToParse(const grpc_slice& slice);
-  grpc_error_handle FinishFrame();
+  grpc_error_handle Parse();
+  void FinishFrame();
 
   grpc_chttp2_hptbl* hpack_table() { return &table_; }
   bool is_boundary() const { return boundary_ != Boundary::None; }