tcl getters accessing a const reference crash with a SIGSEGV

[wfjm]

tcl commands like

  cpu0 get type
  cpu0rka get class
  rlc get timeout

crash with a SIGSEGV. Apparently all getters which internally return a const reference are affected. Observed with gcc 5.4.0. Unclear whether this is a coding bug introduced when boost::bind was replaced by lambdas (in commit 1620ee3) or a compiler issue.

[wfjm]

The culprit was that automatic return type determination for the getter lambdas was used. This fails when the called method returns a reference of an object. The deduced lambda return type will the object, not a reference. Unfortunately this doesn't lead to a compile time error but to a run time error.

Bottom lime is

• automatic return type detection for lambda's can be error prone
• it is safer and also more compact to use std:bind as method forwarder

Fixed with commit 6024dce.