Package: clang Version: 1:3.5-25 Severity: important Dear Maintainer,
*** Reporter, please consider answering these questions, where appropriate *** * What led up to the situation? * What exactly did you do (or not do) that was effective (or ineffective)? * What was the outcome of this action? * What outcome did you expect instead? *** End of the template - remove these template lines *** Source code found to break gcc also breaks clang. The source code that caused the crash is located at: https://ideone.com/J699eJ Pasting below in case link becomes unusable. Source was placed in file test.cpp and compiled with command: clang -std=c++14 test.cpp Link to output of command: https://www.reddit.com/r/programming/comments/4gcp9r/snippet_that_causes_g_to_hang_and_use_gigabytes/d2gr09p Output is pasted below source code below: // ==================== #include <stdio.h> // tested on gcc-4.9.3 on linux gentoo amd64 // warning: compiling this will eat gigabytes of ram really fast so keep // your CTRL-C ready // compile with --std=c++14 struct v2f { float x=0, y=0; // must be =0 to reproduce (probably works with other vals) }; namespace { struct foo { // declaring the array like this somehow bypasses the fact that // v2f cannot be initialized with {0} static const size_t max_objects = 0xFFFF; size_t num_objects; // this is not necessary, just wanted to check if it still did it when not accessing bars v2f bars[max_objects * 255]; // the larger this array is, the longer it hangs for and the more memory it uses }; foo f{0}; // must be initialized with {0} to reproduce } int main() { printf("%ld\n", f.num_objects); } // ==================== clang: error: unable to execute command: Killed clang: error: clang frontend command failed due to signal (use -v to see invocation) Debian clang version 3.5.0-10 (tags/RELEASE_350/final) (based on LLVM 3.5.0) Target: x86_64-pc-linux-gnu Thread model: posix clang: note: diagnostic msg: PLEASE submit a bug report to http://bugs.debian.org/ and include the crash backtrace, preprocessed source, and associated run script. clang: note: diagnostic msg: ******************** PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT: Preprocessed source(s) and associated run script(s) are located at: clang: note: diagnostic msg: /tmp/test-5b3398.cpp clang: note: diagnostic msg: /tmp/test-5b3398.sh clang: note: diagnostic msg: ******************** -- System Information: Debian Release: 8.4 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 4.5.0-x86_64-linode65 (SMP w/1 CPU core) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages clang depends on: ii clang-3.5 1:3.5-10 clang recommends no packages. clang suggests no packages. -- no debconf information