[Gambas-user] [Gambas Bug Tracker] Bug #910: Segfault with Subst$(), IIf() and Null

[bugtracker at ...3416...]

http://gambaswiki.org/bugtracker/edit?object=BUG.910&from=L21haW4-

Tobias BOEGE reported a new bug.

Summary
-------

Segfault with Subst$(), IIf() and Null

Type             : Bug
Priority         : Medium
Gambas version   : 3.8.90 (TRUNK)
Product          : Unknown


Description
-----------

Code such as

    Print Subst$("&1", IIf(False, "x", ""))

results in a segfault on my system. It is crucial that there is an IIf() inside a Subst$() evaluation and that the IIf() evaluates to Null, or the empty string for that matter. The segfault occurs in STRING_subst():

    #0  STRING_subst (str=<optimized out>, len=4, get_param=get_param at ...2861...=0x4118cb <get_subst>) at gbx_string.c:707
    #1  0x0000000000412411 in SUBR_subst (code=<optimized out>) at gbx_subr_string.c:584
    #2  0x000000000043d28b in EXEC_loop () at gbx_exec_loop.c:514

Let me know if debugging symbols are required.