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po $rdi ==> "Couldn't materialize"
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po $rdi ==> "Couldn't materialize"


  • Subject: po $rdi ==> "Couldn't materialize"
  • From: Jerry Krinock <email@hidden>
  • Date: Tue, 22 Jul 2014 10:38:13 -0700

Hello,

For the past several months, I’ve been unable to print registers while debugging a large project I spend most of my time on.  Here’s what happens:

(lldb) po $rdi
error: Couldn't materialize: couldn't read the value of register rdi
Errored out in Execute, couldn't PrepareToExecuteJITExpression
(lldb) p (SEL)$rsi
error: Couldn't materialize: couldn't read the value of register rsi
Errored out in Execute, couldn't PrepareToExecuteJITExpression
(lldb) po $rdx
error: Couldn't materialize: couldn't read the value of register rdx
Errored out in Execute, couldn't PrepareToExecuteJITExpression
(lldb) po $rcx
error: Couldn't materialize: couldn't read the value of register rcx
Errored out in Execute, couldn't PrepareToExecuteJITExpression
(lldb) po $r8
error: Couldn't materialize: couldn't read the value of register r8
Errored out in Execute, couldn't PrepareToExecuteJITExpression
(lldb) po $r9
error: Couldn't materialize: couldn't read the value of register r9
Errored out in Execute, couldn't PrepareToExecuteJITExpressionion

This seems to happen no matter what source I click on in the call stack: one of my methods, a Cocoa method, or an Apple non-public method.

Can anyone explain this?  It happens in both Xcode 5.1 and Xcode 6 beta.

Thanks,

Jerry


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