digitalmars.D.bugs - [Issue 20132] New: segfault on fiber.call() in release mode
- d-bugmail puremagic.com (23/35) Aug 15 2019 https://issues.dlang.org/show_bug.cgi?id=20132
https://issues.dlang.org/show_bug.cgi?id=20132 Issue ID: 20132 Summary: segfault on fiber.call() in release mode Product: D Version: D2 Hardware: x86_64 OS: Linux Status: NEW Severity: normal Priority: P1 Component: dmd Assignee: nobody puremagic.com Reporter: zorael gmail.com dmd 2.078.1, Manjaro/Arch x86_64. dub 1.16.0, ldc 1.16.0. When calling a specific Fiber in dub's release mode, the program segfaults. It works in debug mode, and binaries compiled with ldc are not affected in either mode. It does not happen on Windows, dmd 2.078.0.git clone https://github.com/zorael/tests -b fibersegfault cd tests dub build -b release-debug gdb --ex 'run' --ex 'bt' ./fibersegfaultI reduced it as much as I could, and the resulting source is a brittle mess. Literally changing anything more in it, like removing or reordering function calls, makes the segfault go away. It's only good for reproducing the segfault and debugging, not for reasoning about.Program received signal SIGSEGV, Segmentation fault. 0x00005555555a355b in _D8kameloso7plugins4help13onCommandHelpFCQBnQBhQBc10HelpPluginSQCj3irc4d fs8IRCEventZ2dgMFZv (__capture=0x0) at source/kameloso/plugins/help.d:15 15 void dg() _D8kameloso7plugins4help13onCommandHelpFCQBnQBhQBc10HelpPluginSQCj3irc4d fs8IRCEventZ2dgMFZv (__capture=0x0) at source/kameloso/plugins/help.d:15 /usr/lib/libphobos2.so.0.87 Backtrace stopped: Cannot access memory at address 0x7ffff7fce000__capture=0x0? --
Aug 15 2019