Topic: sigsev on widelands start

kaputtnik Topic Opener Joined: 2013-02-18, 19:48 Posts: 2439 OS: Archlinux Version: current master One Elder of Players Location: Germany	Posted at: 2020-02-16, 09:14 For some reason i can't start widelands anymore. Tried a release build and a debug build, always with deleting the whole directory `build`. Compiled with `compile.sh -r -w` and compile.sh -a -w`. Both builds are crashing immediately: `$> ./widelands This is Widelands Version r24427[0b5ae14@master] (Debug) Set home directory: /home/kaputtnik/.widelands Set configuration file: /home/kaputtnik/.widelands/config Widelands executable directory: /home/kaputtnik/widelands-repo/widelands/ Speicherzugriffsfehler (Speicherabzug geschrieben)` A backtrace is attached. Since glibc is somehow involved and there is another problem with the newest glibc version, i have also tried to downgrade glibc, recompiled, but the crash persists. Anyone else facing this problem? Attachment: backtrace.txt (1.6 KB) Fight simulator for Widelands: https://wide-fighter.netlify.app/ Top Quote

ModellbahnerTT Joined: 2009-07-19, 10:58 Posts: 70 Likes to be here	Posted at: 2020-02-16, 10:31 Which Compiler do you use? If it is gcc 9 the problem is known. Top Quote

kaputtnik Topic Opener Joined: 2013-02-18, 19:48 Posts: 2439 OS: Archlinux Version: current master One Elder of Players Location: Germany	Posted at: 2020-02-16, 17:17 Yes, i have gcc9 installed. But i think the problem is the same as https://github.com/widelands/widelands/issues/3518 A workaround is to set the environment variable XDG_DATA_DIRS before starting widelands: `export XDG_DATA_DIRS= ./widelands` Fight simulator for Widelands: https://wide-fighter.netlify.app/ Top Quote

niektory Joined: 2019-06-03, 19:06 Posts: 206 Widelands-Forum-Junkie Location: Poland	Posted at: 2020-02-16, 17:44 I think I know what the problem is. In this line: `environment = getenv("XDG_DATA_DIRS");` `environment` is a `std::string` variable, but `getenv` returns a C-style string, or `NULL` (a null pointer) if the environment variable is not set. A `std::string` variable is not a pointer, you can't assign `NULL` to it, therefore it crashes in this case. Edited: 2020-02-16, 17:51 Top Quote

GunChleoc Joined: 2013-10-07, 14:56 Posts: 3324 One Elder of Players Location: RenderedRect	Posted at: 2020-02-21, 18:04 Pull request is up: https://github.com/widelands/widelands/pull/3700 Busy indexing nil values Top Quote