fix repeated msg deserialization (#112)

* fix repeated msg deserialization

fixes #109

* Update CHANGELOG.md

Co-authored-by: Tate <tate@transcriptic.com>

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## v0.0.43
+
+- Fix repeated message deserialization by @tatethurston in https://github.com/tatethurston/TwirpScript/pull/112.
+
 ## v0.0.42
 
 - More compact code generation for empty messages by @tatethurston in https://github.com/tatethurston/TwirpScript/pull/101.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "twirpscript",
-  "version": "0.0.42",
+  "version": "0.0.43",
   "description": "A protobuf RPC framework for JavaScript and TypeScript",
   "license": "MIT",
   "author": "Tate Thurston <tatethurston@gmail.com>",
@@ -31,7 +31,7 @@
     "lint:fix": "prettier --write . && prettier-package-json --write '{,example/}package.json'",
     "lint:package:fix": "prettier-package-json --write ./package.json",
     "prepack": "yarn build",
-    "regen": "yarn test -u && yarn examples:check && (cd clientcompat && yarn twirpscript)",
+    "regen": "(cd src/test-serialization && yarn twirpscript) && yarn test -u && yarn examples:check && (cd clientcompat && yarn twirpscript)",
     "test": "yarn jest src/*",
     "test:ci": "yarn test --coverage",
     "typecheck": "yarn tsc --noEmit"

src/autogenerate/index.ts

@@ -240,9 +240,9 @@ function writeSerializers(types: ProtoTypes[], isTopLevel = true): string {
                     });`;
                   } else if (field.read === "readMessage") {
                     if (field.repeated) {
-                      res += `msg.${field.name}.push(
-                      reader.readMessage(${field.tsType}.initialize(), ${field.tsType}._readMessage));
-                    `;
+                      res += `const m = ${field.tsType}.initialize();`;
+                      res += `reader.readMessage(m, ${field.tsType}._readMessage);`;
+                      res += `msg.${field.name}.push(m);`;
                     } else {
                       res += `
                       reader.readMessage(msg.${field.name}, ${field.tsType}._readMessage);