Error in AppInventor: Expected a ',' or '}'

Open Source Development
1

I'm trying to make my own AppInventor for my personal use and for testing.

I followed all of the instructions in the GitHub README.md file, I passed the buildtools test and I cleaned the directory using ant clean, but when I tried to run ant, I run into an error.

I did not make any changes to AppInventor, I just cloned it and ran it. I did not touch any files.

BlocklyCompile:

BlocklyTranslationGenerator:
    [mkdir] Created dir: C:\Users\dell\Documents\AppInventor\appinventor-sources\appinventor\blocklyeditor\build\classes\BlocklyTranslator-classes
    [mkdir] Created dir: C:\Users\dell\Documents\AppInventor\appinventor-sources\appinventor\build\blocklyeditor\msg
    [javac] Compiling 1 source file to C:\Users\dell\Documents\AppInventor\appinventor-sources\appinventor\blocklyeditor\build\classes\BlocklyTranslator-classes
    [javac] warning: [options] bootstrap class path not set in conjunction with -source 1.7
    [javac] 1 warning

BUILD FAILED
C:\Users\dell\Documents\AppInventor\appinventor-sources\appinventor\build.xml:16: The following error occurred while executing this line:
C:\Users\dell\Documents\AppInventor\appinventor-sources\appinventor\build-common.xml:301: The following error occurred while executing this line:
C:\Users\dell\Documents\AppInventor\appinventor-sources\appinventor\blocklyeditor\build.xml:95: org.json.JSONException: Expected a ',' or '}' at 56001 [character 296 line 791]
        at org.json.JSONTokener.syntaxError(JSONTokener.java:433)
        at org.json.JSONObject.<init>(JSONObject.java:229)
        at org.json.JSONObject.<init>(JSONObject.java:321)
        at msg.BlocklyTranslationGenerator.main(BlocklyTranslationGenerator.java:74)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.tools.ant.taskdefs.ExecuteJava.run(ExecuteJava.java:221)
        at org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:154)
        at org.apache.tools.ant.taskdefs.Java.run(Java.java:832)
        at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:226)
        at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:135)
        at org.apache.tools.ant.taskdefs.Java.execute(Java.java:108)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:352)
        at org.apache.tools.ant.Target.execute(Target.java:437)
        at org.apache.tools.ant.Target.performTasks(Target.java:458)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1406)
        at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:36)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1261)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:442)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:352)
        at org.apache.tools.ant.Target.execute(Target.java:437)
        at org.apache.tools.ant.Target.performTasks(Target.java:458)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1406)
        at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:36)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1261)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:442)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:352)
        at org.apache.tools.ant.Target.execute(Target.java:437)
        at org.apache.tools.ant.Target.performTasks(Target.java:458)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1406)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1377)
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1261)
        at org.apache.tools.ant.Main.runBuild(Main.java:857)
        at org.apache.tools.ant.Main.startAnt(Main.java:236)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:287)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:112)

Total time: 20 seconds

I've had this error for a few days before now. Help is appreciated.

2

Did you clone it recently?

3

Yes.

4

You should check the any changes you've made to blocklyeditor/src/msg/ai_blockly/messages.json. The error in question is failing in the code that computes the final set of messages for each language by populating missing keys in other languages from their English counterparts.

1 Like
5

I did not change the code, I checked it and matched it. I tried to copy the code from GitHub back into AppInvenor, the error still appears.

6

You should be able to use git status to check what files in that directory have changed and git diff to see the changes if any.

2 Likes
7 
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean

Before I check this, I cloned the repo again, and the error still occurs...

8

What is the default file encoding on your machine? You may want to try adding:

<jvmarg value="-Dfile.encoding=UTF8"/>

to the <java> tag in the BlocklyTranslationGenerator target in blocklyeditor/build.xml if your default encoding isn't UTF-8 since it might be that Java's File API is incorrectly decoding the JSON content on your machine.

1 Like