search for: lfb2

...ler are you talking about, and on what platform? The results I'm seeing clearly have both gcc and clang on Darwin generating different LSDAs for your cleanup examples and your catch-all examples. Here is the output I see from gcc-4.2 for your cleanup example: .text .globl __Z3barv __Z3barv: LFB2: pushq %rbp LCFI0: movq %rsp, %rbp LCFI1: pushq %rbx LCFI2: subq $40, %rsp LCFI3: leaq -17(%rbp), %rdi call __ZN3BobC1Ev leaq -18(%rbp), %rdi call __ZN3BobC1Ev leaq -19(%rbp), %rdi call __ZN3BobC1Ev LEHB0: call __Z3foov LEHE0: <snip> .section __TEXT,__gcc_except_tab GCC_except_t...

John, I'm still not sure what you're talking about, I have included the assembly output from two compilations, one with a user explicit catch-all, one with only an implicit cleanup, the DWARF Action Table and Types Table are absolutely identical, as are the indexes used to reference the Action Table from the region maps. -Peter Lawrence.