LLDB does not always understand dot notation for property access

Originator:numist
Number:rdar://12616493 Date Originated:01-Nov-2012 10:39 AM
Status:Open Resolved:
Product:Developer Tools Product Version:Xcode Version 4.5.1 (4G1004)/LLDB-167.4
Classification:UI/Usability Reproducible:Always
 
Summary:
LLDB does not always treat dot notation the same as bracketed message passing when dealing with objects.

Sure, dot notation exists as a separate entity in C and Objective-C, but it's possible enough to tell the difference at runtime—does the value duck like a valid pointer to an objc_object?

Steps to Reproduce:
(lldb) po [set anyObject].foo

Expected Results:
(id) $10 = 0x200e0350 foo

Actual Results:
error: no known method '-anyObject'; cast the message send to the method's return type
error: 1 errors parsing expression

Workaround:
(lldb) po [[set anyObject] foo]
(id) $10 = 0x200e0350 foo

Notes:
The error message is also misleading, but at least the suggestion it makes provides another workaround. symbol.foo works if symbol is in scope (since lldb has type information for it).

Comments


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