with today's build, i got this upon clicking a [tgl] in a nested GOP (couldn't reproduce it from scratch)

*** buffer overflow detected ***: ./pd terminated
======= Backtrace: =========
/lib/libc.so.6(__fortify_fail+0x37)[0x7f7189d6d217]
/lib/libc.so.6(+0xfe0d0)[0x7f7189d6c0d0]
/lib/libc.so.6(+0xfd539)[0x7f7189d6b539]
/lib/libc.so.6(_IO_default_xsputn+0xcc)[0x7f7189ce3d1c]
/lib/libc.so.6(_IO_vfprintf+0x14c)[0x7f7189cb34ec]
/lib/libc.so.6(__vsprintf_chk+0x99)[0x7f7189d6b5d9]
/lib/libc.so.6(__sprintf_chk+0x7f)[0x7f7189d6b51f]
./pd[0x479cd4]
./pd(sys_pollgui+0xb8)[0x49ed78]
./pd(m_mainloop+0x84b)[0x4984db]
./pd(sys_main+0x225)[0x49d0b5]
/lib/libc.so.6(__libc_start_main+0xfd)[0x7f7189c8cc4d]
./pd[0x414159]
======= Memory map: ========
00400000-0050b000 r-xp 00000000 08:12 2769414                            /home/muranyia/Download/pd/bin/pd
0070a000-0070b000 r--p 0010a000 08:12 2769414                            /home/muranyia/Download/pd/bin/pd
0070b000-0070d000 rw-p 0010b000 08:12 2769414                            /home/muranyia/Download/pd/bin/pd
0070d000-00b1d000 rw-p 00000000 00:00 0
01694000-0d33e000 rw-p 00000000 00:00 0                                  [heap]
7f71798b6000-7f71798b8000 r-xp 00000000 08:12 877193                     /usr/lib/pd-extended/extra/iemlib/add2_comma.pd_linux
7f71798b8000-7f7179ab7000 ---p 00002000 08:12 877193                     /usr/lib/pd-extended/extra/iemlib/add2_comma.pd_linux
7f7179ab7000-7f7179ab8000 r--p 00001000 08:12 877193                     /usr/lib/pd-extended/extra/iemlib/add2_comma.pd_linux
7f7179ab8000-7f7179ab9000 rw-p 00002000 08:12 877193                     /usr/lib/pd-extended/extra/iemlib/add2_comma.pd_linux
7f7179ab9000-7f7179aba000 r-xp 00000000 08:12 459292                     /usr/lib/pd-extended/extra/tof/to_ascii_code.pd_linux
7f7179aba000-7f7179cba000 ---p 00001000 08:12 459292                     /usr/lib/pd-extended/extra/tof/to_ascii_code.pd_linux
7f7179cba000-7f7179cbb000 r--p 00001000 08:12 459292                     /usr/lib/pd-extended/extra/tof/to_ascii_code.pd_linux
7f7179cbb000-7f7179cbc000 rw-p 00002000 08:12 459292                     /usr/lib/pd-extended/extra/tof/to_ascii_code.pd_linux
7f7179cbc000-7f7179cbd000 r-xp 00000000 08:12 880139                     /usr/lib/pd-extended/extra/maxlib/divmod.pd_linux
7f7179cbd000-7f7179ebc000 ---p 00001000 08:12 880139                     /usr/lib/pd-extended/extra/maxlib/divmod.pd_linux
7f7179ebc000-7f7179ebd000 r--p 00000000 08:12 880139                     /usr/lib/pd-extended/extra/maxlib/divmod.pd_linux
7f7179ebd000-7f7179ebe000 rw-p 00001000 08:12 880139                     /usr/lib/pd-extended/extra/maxlib/divmod.pd_linux
7f7179ebe000-7f7179ec2000 r-xp 00000000 08:12 1467325                    /usr/lib/pd-extended/extra/iemgui/iem_image.pd_linux
7f7179ec2000-7f717a0c1000 ---p 00004000 08:12 1467325                    /usr/lib/pd-extended/extra/iemgui/iem_image.pd_linux
7f717a0c1000-7f717a0c2000 r--p 00003000 08:12 1467325                    /usr/lib/pd-extended/extra/iemgui/iem_image.pd_linux
7f717a0c2000-7f717a0c3000 rw-p 00004000 08:12 1467325                    /usr/lib/pd-extended/extra/iemgui/iem_image.pd_linux
7f717a0c3000-7f717a0c7000 r-xp 00000000 08:12 911395                     /usr/lib/pd-extended/extra/flatspace/popup.pd_linux
7f717a0c7000-7f717a2c6000 ---p 00004000 08:12 911395                     /usr/lib/pd-extended/extra/flatspace/popup.pd_linux
7f717a2c6000-7f717a2c7000 r--p 00003000 08:12 911395                     /usr/lib/pd-extended/extra/flatspace/popup.pd_linux
7f717a2c7000-7f717a2c8000 rw-p 00004000 08:12 911395                     /usr/lib/pd-extended/extra/flatspace/popup.pd_linux
7f717a2c8000-7f717a2ce000 r-xp 00000000 08:12 2762244                    /usr/lib/pd-extended/extra/cyclone/switch.pd_linux
7f717a2ce000-7f717a4cd000 ---p 00006000 08:12 2762244                    /usr/lib/pd-extended/extra/cyclone/switch.pd_linux
7f717a4cd000-7f717a4ce000 r--p 00005000 08:12 2762244                    /usr/lib/pd-extended/extra/cyclone/switch.pd_linux
7f717a4ce000-7f717a4cf000 rw-p 00006000 08:12 2762244                    /usr/lib/pd-extended/extra/cyclone/switch.pd_linux
7f717a4cf000-7f717a4d6000 r-xp 00000000 08:12 2762328                    /usr/lib/pd-extended/extra/cyclone/prepend.pd_linux
7f717a4d6000-7f717a6d5000 ---p 00007000 08:12 2762328                    /usr/lib/pd-extended/extra/cyclone/prepend.pd_linux
7f717a6d5000-7f717a6d6000 r--p 00006000 08:12 2762328                    /usr/lib/pd-extended/extra/cyclone/prepend.pd_linux
7f717a6d6000-7f717a6d7000 rw-p 00007000 08:12 2762328                    /usr/lib/pd-extended/extra/cyclone/prepend.pd_linux
7f717a6d7000-7f717a6d8000 r-xp 00000000 08:12 1630422                    /usr/lib/pd-extended/extra/jasch_lib/strcut.pd_linux
7f717a6d8000-7f717a8d8000 ---p 00001000 08:12 1630422                    /usr/lib/pd-extended/extra/jasch_lib/strcut.pd_linux
7f717a8d8000-7f717a8d9000 r--p 00001000 08:12 1630422                    /usr/lib/pd-extended/extra/jasch_lib/strcut.pd_linux
7f717a8d9000-7f717a8da000 rw-p 00002000 08:12 1630422                    /usr/lib/pd-extended/extra/jasch_lib/strcut.pd_linux
7f717a8da000-7f717a8dc000 r-xp 00000000 08:12 1638450                    /home/muranyia/Download/pd/extra/moonlib/absolutepath.pd_linux
7f717a8dc000-7f717aadb000 ---p 00002000 08:12 1638450                    /home/muranyia/Download/pd/extra/moonlib/absolutepath.pd_linux
7f717aadb000-7f717aadc000 r--p 00001000 08:12 1638450                    /home/muranyia/Download/pd/extra/moonlib/absolutepath.pd_linux
7f717aadc000-7f717aadd000 rw-p 00002000 08:12 1638450                    /home/muranyia/Download/pd/extra/moonlib/absolutepath.pd_linux
7f717aadd000-7f717aaf3000 r-xp 00000000 08:12 2236471                    /usr/lib/pd-extended/extra/toxy/widget.pd_linux
7f717aaf3000-7f717acf2000 ---p 00016000 08:12 2236471                    /usr/lib/pd-extended/extra/toxy/widget.pd_linux
7f717acf2000-7f717acf3000 r--p 00015000 08:12 2236471                    /usr/lib/pd-extended/extra/toxy/widget.pd_linux
7f717acf3000-7f717acf7000 rw-p 00016000 08:12 2236471                    /usr/lib/pd-extended/extra/toxy/widget.pd_linux
7f717acf7000-7f717acff000 r-xp 00000000 08:12 2762384                    /usr/lib/pd-extended/extra/cyclone/comment.pd_linux
7f717acff000-7f717aefe000 ---p 00008000 08:12 2762384                    /usr/lib/pd-extended/extra/cyclone/comment.pd_linux
7f717aefe000-7f717aeff000 r--p 00007000 08:12 2762384                    /usr/lib/pd-extended/extra/cyclone/comment.pd_linux
7f717aeff000-7f717af00000 rw-p 00008000 08:12 2762384                    /usr/lib/pd-extended/extra/cyclone/comment.pd_linux
7f717b473000-7f717b475000 r-xp 00000000 08:12 911332                     /usr/lib/pd-extended/extra/flatspace/line3.pd_linux
7f717b475000-7f717b674000 ---p 00002000 08:12 911332                     /usr/lib/pd-extended/extra/flatspace/line3.pd_linux
7f717b674000-7f717b675000 r--p 00001000 08:12 911332                     /usr/lib/pd-extended/extra/flatspace/line3.pd_linux
7f717b675000-7f717b676000 rw-p 00002000 08:12 911332                     /usr/lib/pd-extended/extra/flatspace/line3.pd_linux
7f717b676000-7f717b67b000 r-xp 00000000 08:12 2762397                    /usr/lib/pd-extended/extra/cyclone/speedlim.pd_linux
7f717b67b000-7f717b87a000 ---p 00005000 08:12 2762397                    /usr/lib/pd-extended/extra/cyclone/speedlim.pd_linux
7f717b87a000-7f717b87b000 r--p 00004000 08:12 2762397                    /usr/lib/pd-extended/extra/cyclone/speedlim.pd_linux
7f717b87b000-7f717b87c000 rw-p 00005000 08:12 2762397                    /usr/lib/pd-extended/extra/cyclone/speedlim.pd_linux
7f717b87c000-7f717b881000 r-xp 00000000 08:12 1638507                    /home/muranyia/Download/pd/extra/moonlib/mknob.pd_linux
7f717b881000-7f717ba81000 ---p 00005000 08:12 1638507                    /home/muranyia/Download/pd/extra/moonlib/mknob.pd_linux
7f717ba81000-7f717ba82000 r--p 00005000 08:12 1638507                    /home/muranyia/Download/pd/extra/moonlib/mknob.pd_linux
7f717ba82000-7f717ba83000 rw-p 00006000 08:12 1638507                    /home/muranyia/Download/pd/extra/moonlib/mknob.pd_linux
7f717ba83000-7f717baaa000 r-xp 00000000 08:12 1305710                    /usr/lib/pd-extended/extra/expr~/expr.pd_linux
7f717baaa000-7f717bca9000 ---p 00027000 08:12 1305710                    /usr/lib/pd-extended/extra/expr~/expr.pd_linux
7f717bca9000-7f717bcaa000 r--p 00026000 08:12 1305710                    /usr/lib/pd-extended/extra/expr~/expr.pd_linux
7f717bcaa000-7f717bcab000 rw-p 00027000 08:12 1305710                    /usr/lib/pd-extended/extra/expr~/expr.pd_linux
7f717bcab000-7f717bcac000 r-xp 00000000 08:12 2762425                    /usr/lib/pd-extended/extra/cyclone/fromsymbol.pd_linux
7f717bcac000-7f717beac000 ---p 00001000 08:12 2762425                    /usr/lib/pd-extended/extra/cyclone/fromsymbol.pd_linux
7f717beac000-7f717bead000 r--p 00001000 08:12 2762425                    /usr/lib/pd-extended/extra/cyclone/fromsymbol.pd_linux
7f717bead000-7f717beae000 rw-p 00002000 08:12 2762425                    /usr/lib/pd-extended/extra/cyclone/fromsymbol.pd_linux
7f717beae000-7f717bec6000 rw-p 00000000 00:00 0
7f717bf4b000-7f717c07b000 rw-p 00000000 00:00 0
7f717c07b000-7f717c07c000 ---p 00000000 00:00 0
7f717c07c000-7f717c87c000 rw-p 00000000 00:00 0
7f717c87c000-7f717c881000 r-xp 00000000 08:12 2187497                    /usr/lib/libXv.so.1.0.0
7f717c881000-7f717ca80000 ---p 00005000 08:12 2187497                    /usr/lib/libXv.so.1.0.0
7f717ca80000-7f717ca81000 r--p 00004000 08:12 2187497                    /usr/lib/libXv.so.1.0.0
7f717ca81000-7f717ca82000 rw-p 00005000 08:12 2187497                    /usr/lib/libXv.so.1.0.0
7f717ca82000-7f717caa7000 r-xp 00000000 08:12 2638343                    /lib/libpng12.so.0.42.0
7f717caa7000-7f717cca7000 ---p 00025000 08:12 2638343                    /lib/libpng12.so.0.42.0
7f717cca7000-7f717cca8000 r--p 00025000 08:12 2638343                    /lib/libpng12.so.0.42.0
7f717cca8000-7f717cca9000 rw-p 00026000 08:12 2638343                    /lib/libpng12.so.0.42.0
7f717cca9000-7f717cea5000 r-xp 00000000 08:12 2187780                    /usr/lib/libgsl.so.0.14.0
7f717cea5000-7f717d0a4000 ---p 001fc000 08:12 2187780                    /usr/lib/libgsl.so.0.14.0
7f717d0a4000-7f717d0a7000 r--p 001fb000 08:12 2187780                    /usr/lib/libgsl.so.0.14.0
7f717d0a7000-7f717d0b0000 rw-p 001fe000 08:12 2187780                    /usr/lib/libgsl.so.0.14.0
7f717d0b0000-7f717d0e9000 r-xp 00000000 08:12 2191279                    /usr/lib/libgslcblas.so.0.0.0
7f717d0e9000-7f717d2e8000 ---p 00039000 08:12 2191279                    /usr/lib/libgslcblas.so.0.0.0
7f717d2e8000-7f717d2e9000 r--p 00038000 08:12 2191279                    /usr/lib/libgslcblas.so.0.0.0Pd: signal 6


Andras