--- breadcrumbs: - - /developers - For Developers - - /developers/design-documents - Design Documents - - /developers/design-documents/network-stack - Network Stack - - /developers/design-documents/network-stack/network-bug-triage - Network bug triage page_name: downloads-bug-triage title: Triaging Downloads Bugs --- [Downloads bugs](https://code.google.com/p/chromium/issues/list?can=2&q=cr-ui-browser%3Ddownloads&sort=&groupby=&colspec=ID+Pri+Status+Modified+Owner+Summary&nobtn=Update) are automatically cc'd to the mailing list download-bugs@chromium.org. People on the bugs rotation should subscribe to that list. The suggested frequency for handling incoming bugs is 2-3 days, but that's just a suggestion. Triagers should 1. Attempt to reproduce and set the correct Status for [untriaged and unconfirmed bugs](https://crbug.com/?q=cr-ui-browser%3Ddownloads+status%3Auntriaged%2Cunconfirmed+-blocking%3A96604+-needs%3Dfeedback&colspec=ID+Summary+Modified). (That search ignores Needs-Feedback and External bugs.) * Engage with users as they report bugs to get all the information we need for eventual resolution. * Set Type-Feature Available for feature requests or mark WontFix and explain why this feature is unlikely to be implemented. * Crash reports frequently do not contain crash ids. Send reporters to [Reporting a Crash Bug](/for-testers/bug-reporting-guidelines/reporting-crash-bug) and set Needs-Feedback. * [Providing Network Details for bug reports](/for-testers/providing-network-details) * Ensure high priority bugs receive appropriate attention. Consult benjhayden or asanka if necessary in order to ensure timely resolution. High priority bugs include * Regressions: Mark as Type-Bug-Regression Pri-1 * Possible security problems: Request security review and lock down (Restrict-View-Commit). If security review shows severity medium or higher, mark Pri-1 * Crashers: Mark as Pri-1 if it's on the top crash list or looks likely to happen in the wild. If it looks like a use-after-free that might be reproducible in the wild, it's a security issue. * [chromecrash query](https://chromecrash.corp.google.com/browse?q=int32(extract_regexp(product.version%2C%20r'%5Cd%2B%5C.%5Cd%2B%5C.(%5Cd%2B)%5C.%5Cd%2B'))%20%3E%3D%200%20AND%0Acustom_data.ChromeCrashProto.ptype%3D'browser'%20AND%0A(custom_data.ChromeCrashProto.magic_signature_1.component%20CONTAINS%20'src%2Fcontent%2Fbrowser%2Fdownload'%20OR%0A%20custom_data.ChromeCrashProto.magic_signature_1.component%20CONTAINS%20'src%2Fchrome%2Fbrowser%2Fdownload'%20OR%0A%20custom_data.ChromeCrashProto.magic_signature_1.file_path%20CONTAINS%20'src%2Fchrome%2Fbrowser%2Fextensions%2Fapi%2Fdownloads'%20OR%0A%20custom_data.ChromeCrashProto.magic_signature_1.file_path%20CONTAINS%20'src%2Fchrome%2Fbrowser%2Fui%2Fwebui%2Fdownload')): fiddle with the literal 0 to find crashes before/after/at a specific branch. * Badly broken features * Failing or disabled tests * Mark duplicates as such. [Frequently duplicated bugs](/developers/design-documents/network-stack/network-bug-triage/downloads-bug-triage/salient-bug-list) * Some issues on windows are due to bad shell extensions. Point reporters to [ShellMenuView](http://www.nirsoft.net/utils/shell_menu_view.html) 2. Categorize [uncategorized bugs](https://crbug.com?q=cr-ui-browser%3Ddownloads+-blocking%3A68191+-blocking%3A68195+-blocking%3A68196+-blocking%3A68197+-blocking%3A68198+-blocking%3A68200+-blocking%3A68201+-blocking%3A68204+-blocking%3A68206+-blocking%3A68208+-blocking%3A68209+-blocking%3A68276+-blocking%3A68356+-blocking%3A68358+-blocking%3A68359+-blocking%3A68361+-blocking%3A69298+-blocking%3A78147+-blocking%3A78148+-blocking%3A96604+-blocking%3A133971+-blocking%3A133960&colspec=ID+Summary+Modified) by adding them to the "Blocked on" list of one of [these category bugs](https://crbug.com/?q=Cr-Ui-Browser%3DDownloads+blocking%3A133960&colspec=ID+Summary). 3. Sweep [needs=feedback](https://code.google.com/p/chromium/issues/list?can=2&q=cr-ui-browser=downloads%20needs=feedback&sort=modified&colspec=ID%20Status%20Owner%20Summary%20Modified): if feedback has been provided, remove needs-feedback and continue debugging; if feedback has not been provided after 2 weeks, Archive the bug. 4. When major changes such as file moves happen, either update the below documentation or delete it if nobody has found it useful. FAQ, Bug-hunting tips Where to begin fixing different kinds of bugs. Please feel free extend this liberally. * Main entry point from the ResourceDispatcherHost to the downloads system: [BufferedResourceHandler](https://code.google.com/p/chromium/codesearch#chromium/src/content/browser/loader/buffered_resource_handler.cc) decides whether RDH should create [DownloadResourceHandler](https://code.google.com/p/chromium/codesearch#chromium/src/content/browser/download/download_resource_handler.cc) * The download state machine is managed on the UI thread in [DownloadItemImpl](https://code.google.com/p/chromium/codesearch#chromium/src/content/browser/download/download_item_impl.cc), managed by [DownloadManagerImpl](https://code.google.com/p/chromium/codesearch#chromium/src/content/browser/download/download_manager_impl.cc). * chrome://downloads [WebUI](https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/ui/webui/downloads_dom_handler.cc) [HTML/CSS/JS](https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/resources/downloads/) * [Target filename determiner](https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/download/download_target_determiner.cc) * [DownloadHistory](https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/download/download_history.cc) observes the DownloadManager and DownloadItems and posts changes to [DownloadDatabase](https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/history/download_database.cc) * chrome.downloads Extension API [IDL](https://code.google.com/p/chromium/codesearch#chromium/src/chrome/common/extensions/api/downloads.idl), [implementation](https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/extensions/api/downloads/downloads_api.cc) * Multiple automatic download throttling infobar [DownloadRequestLimiter](https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/download/download_request_limiter.cc)