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4ba34b038c
in the [SpiderMonkey Debugger API](https://firefox-source-docs.mozilla.org/js/Debugger/), there is a separate [Debugger.Script](https://firefox-source-docs.mozilla.org/js/Debugger/Debugger.Script.html) object for each function in a script, forming a tree of Script objects. since we were only issuing [getPossibleBreakpoints()](https://firefox-source-docs.mozilla.org/js/Debugger/Debugger.Script.html#getpossiblebreakpoints-query) queries to the [root Script object](https://firefox-source-docs.mozilla.org/js/Debugger/Debugger.html#onnewscript-script-global) for each script, we were failing to report locations inside functions as available for setting breakpoints. this patch fixes that by recursively issuing the getPossibleBreakpoints() requests over the [getChildScripts()](https://firefox-source-docs.mozilla.org/js/Debugger/Debugger.Script.html#getchildscripts) tree. Testing: this patch adds a new devtools test Signed-off-by: Delan Azabani <dazabani@igalia.com> Co-authored-by: atbrakhi <atbrakhi@igalia.com>