qdoc segfaults on x86_64 builds

Since 5.2.0 qdoc segfaults on 64bit Intel architectures; output (with debugging on):
...
DEBUG: "Writing: ../html/qmlmodule.html"
String
qdoc: warning: No documentation for 'global'
Segmentation fault

gdb:
Program terminated with signal 11, Segmentation fault.
#0 0x000000000047f544 in generateInnerNode (node=0x2283fa8, this=0x7fffc4362390) at generator.cpp:1018
(gdb) info loc
marker = <optimized out>
c = {i = 0x22ce408}
(gdb) bt
#0 0x000000000047f544 in generateInnerNode (node=0x2283fa8, this=0x7fffc4362390) at generator.cpp:1018
#1 Generator::generateInnerNode (this=0x7fffc4362390, node=0x2283fa8) at generator.cpp:966
#2 0x00000000004b3d74 in HtmlGenerator::generateTree (this=0x7fffc4362390) at htmlgenerator.cpp:276
#3 0x00000000004be686 in processQdocconfFile (fileName=...) at main.cpp:515
#4 0x0000000000411a5f in main (argc=2, argv=<optimized out>) at main.cpp:669

Segfaults on attempt to access memory pointed by (*c):
https://qt.gitorious.org/qt/qtbase/source/b4c28856f16c164a5a774722a379bbe34a45527c:src/tools/qdoc/generator.cpp#L1018

The line:
qdoc: warning: No documentation for 'global'
is not present in pre 5.2.0 versions.

(that line is present also in x86_32 5.2.0 builds, but no segfault happens)