I have just tested josm-tested and the same thing happens, so it looks as if it is a debian/java problem rather than anything to do with josm. Sorry for the noise, but it might be useful to know that there is a problem on debian testing just now.
Here is the extract from Xorg.0.log: [ 3637.585] (EE) Backtrace: [ 3637.585] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4e) [0x5642f568249e] [ 3637.585] (EE) 1: /usr/lib/xorg/Xorg (0x5642f54cd000+0x1b9819) [0x5642f5686819] [ 3637.585] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f96cf8cd000+0x33590) [0x7f96cf900590] [ 3637.585] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (0x7f96cf8cd000+0x785e8) [0x7f96cf9455e8] [ 3637.585] (EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (__libc_calloc+0xd5) [0x7f96cf948395] [ 3637.585] (EE) 5: /usr/lib/xorg/Xorg (0x5642f54cd000+0x508b2) [0x5642f551d8b2] [ 3637.585] (EE) 6: /usr/lib/xorg/Xorg (0x5642f54cd000+0x53a3f) [0x5642f5520a3f] [ 3637.585] (EE) 7: /usr/lib/xorg/Xorg (0x5642f54cd000+0x57a53) [0x5642f5524a53] [ 3637.585] (EE) 8: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f96cf8ed870] [ 3637.585] (EE) 9: /usr/lib/xorg/Xorg (_start+0x29) [0x5642f550ede9] [ 3637.585] (EE) [ 3637.585] (EE) Bus error at address 0x0 [ 3637.585] (EE) Fatal server error: [ 3637.585] (EE) Caught signal 7 (Bus error). Server aborting [ 3637.585] (EE) ael _______________________________________________ josm-dev mailing list josm-dev@openstreetmap.org https://lists.openstreetmap.org/listinfo/josm-dev