445541 - "ASSERTION: Give me something to work with" with radiolab feed

Status: RESOLVED INACTIVE

(Firefox Graveyard :: RSS Discovery and Preview, defect)

Description

[Jesse Ruderman]

Attachment: stack traces for the assertions

Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1a1pre) Gecko/2008071414 Minefield/3.1a1pre

Steps to reproduce:
1. Load http://feeds.wnyc.org/radiolab.

Result:

###!!! ASSERTION: Give me something to work with: '!aMIMEType.IsEmpty() || !aFileExt.IsEmpty()', file uriloader/exthandler/nsExternalHelperAppService.cpp, line 2342

###!!! ASSERTION: Empty aExtension parameter!: '!aExtension.IsEmpty()', file uriloader/exthandler/nsExternalHelperAppService.cpp, line 2669

Comment 1

[Boris Zbarsky [:bzbarsky]]

We're in FW__buildEnclosureDiv and the relevant call is:

  595           var handlerInfoWrapper = this._mimeSvc.getFromTypeAndExtension(enc.get("type"), null);

Apparently the type is empty string here, so naturally the MIME service asserts: it can't do anything sane in this situation.

Comment 2

[Robert Sayre]

Is an assertion really the right behavior?

Comment 3

[Boris Zbarsky [:bzbarsky]]

For a contract violation?  I suppose this code could throw instead (or in addition to).  But the IDL clearly documents the contract here, and the caller is not following it.

Comment 4

[Jesse Ruderman]

WFM with the URL in comment 0.

Comment 5

[BMO Automation]

Per policy at https://wiki.mozilla.org/Bug_Triage/Projects/Bug_Handling/Bug_Husbandry#Inactive_Bugs. If this bug is not an enhancement request or a bug not present in a supported release of Firefox, then it may be reopened.