http://gambaswiki.org/bugtracker/edit?object=BUG.894&from=L21haW4-
Tobias BOEGE reported a new bug.
Summary
-------
gb.xml: XmlDocument.FromString(Null) crashes
Type : Bug
Priority : Low
Gambas version : 3.8.90 (TRUNK)
Product : Unknown
Description
-----------
Hi Adrien,
gb.xml crashes with:
Public Sub Main()
Dim h As New XmlDocument
h.FromString(Null)
End
(Note that h.FromString("") works.) gdb indicates that some arithmetic in your
utils.cpp:memchrs()
is wrong (from frame #2 to #1 the length increases from 0 to 1 which is deadly
for NULL pointers):
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7abb118 in memchr () from /usr/lib/libc.so.6
(gdb) bt
#0 0x00007ffff7abb118 in memchr () from /usr/lib/libc.so.6
#1 0x00007ffff63bf630 in memchr (__n=1, __c=<optimized out>, __s=0x0) at
/usr/include/string.h:81
#2 memchrs (source=0x0, lensource=0, comp=0x7ffff63c5964 "<?xml ",
lencomp=6) at utils.cpp:142
#3 0x00007ffff63c0f9a in XMLDocument_SetContent (doc=0x68f420, content=0x0,
len=0) at document.cpp:117
#4 0x00007ffff63c31fc in CDocument_fromString (_object=<optimized out>,
_param=<optimized out>) at CDocument.cpp:94
#5 0x0000000000431282 in EXEC_native () at gbx_exec.c:1366
#6 0x0000000000431b15 in EXEC_native_check (defined=<optimized out>) at
gbx_exec.c:1163
#7 0x000000000043b65b in EXEC_loop () at gbx_exec_loop.c:1159
#8 0x00000000004300e5 in EXEC_function_loop () at gbx_exec.c:931
#9 0x0000000000430a1e in EXEC_function_real () at gbx_exec.c:895
#10 0x0000000000432094 in EXEC_public_desc (class=<optimized out>,
object=object@entry=0x0, desc=desc@entry=0x68ee78, nparam=nparam@entry=0) at
gbx_exec.c:1620
#11 0x0000000000404869 in main (argc=1, argv=0x7fffffffe678) at gbx.c:416
Regards,
Tobi
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