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Editorial Team
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Asked: 2026-06-06T20:36:49+00:00

There’s a bug in my app which shows up with the following (partial) stacktrace:

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There’s a bug in my app which shows up with the following (partial) stacktrace:

2011-11-25 01:55:59.760 Events2[6650:403] -[Event boolValue]: unrecognized selector sent to instance 0x7fb903928670

To debug this I decided to add a symbolic breakpoint on -[Event boolValue] reasoning that when that selector is sent, the debugger would halt.

However, nothing happens. After setting the breakpoint the app just soldiers on and generates the same exception without halting.

I have defined the breakpoint as follows:

enter image description here

I’m using the LLDB debugger with Xcode 4.2

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1 Answer

  1. Editorial Team

    Setting a breakpoint on a selector causes lldb to halt when that selector is executed, not when it is sent. In your case, there is no selector “-[Event boolValue]”, therefore this breakpoint will never be hit.

    I would set an exception breakpoint on “All Objective-C Exceptions”. This will be hit when the “unrecognized selector sent” exception is thrown and you can see where the problem occurs.

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