unable to load source for library "bootstrap_impl"

[devoncarew]

We received the following user feedback:

Running the standlone program in Debug mode resulted in failure to find source code for core library.

foo(u) { u.add(123); }

void main() {
 foo(new List<String>());
}

I was trying to provoke a type error when crossing into corelib.
DartEditor then opened a window named: "GrowableObjectArray.ad()" with the content: Source not found.

Finding the corelib source should be easy.

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I tracked this down a bit. The stack frame in question has a source location uri of "bootstrap_impl". Normally this is something like "dart:core" or "dart:coreimpl". In order to get the source, we ask the VM for all loaded libraries, look for a library with the given name, then ask the VM for the source for the library's libraryId.

There isn't any library returned with the name bootstrap_impl. If the wire protocol was changed so that the getSource command took a URI instead of a libraryId, that'd fix the issue. Or if bootstrap_impl was returned in teh list of loaded libraries. I'm not sure if that's the right solution - I don't know if this library should be exposed through the API or not.

[devoncarew]

Issue #3695 has been merged into this issue.

[DartBot]

This comment was originally written by @mhausner

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The debugger now sends a library id with each frame. The library id for GrowableObjectArray.add is 1, which refers to dart:coreimpl. You can get a list of source URLs for a library with the command getScriptURLs. If you do that for dart:coreimpl, it shows "bootstrap_impl" as the only source URL. With the library id and this URL, you can get the source code.

Be warned though that the source code for the pre-loaded libraries does not look pretty at the moment, because we re-generate the source from the token stream, and we don't know where newlines were in the original source. We will eventually do a better job in recreating the source.

If this does not solve your issue, reassign the bug back to me.

Thanks!

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Set owner to @devoncarew.
Added NeedsInfo label.

[devoncarew]

Added Started label.

[devoncarew]

Added Fixed label.