Bug 8671 – Segmentation fault with 1.0 - uniform(0.0, 1.0)

This program segfaults on OSX 10.6.8 with DMD 2.060. Happens with both -m32 and -m64. import std.random; void main() { double t = 1.0 - uniform(0.0, 1.0); } Here's the result of running gdb: Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: 13 at address: 0x0000000000000000 0x00007fff89c44fc1 in dyld_stub_binder () (gdb) bt #0 0x00007fff89c44fc1 in dyld_stub_binder () #1 0x00000001000292e8 in pvars () #2 0x00000001000224f5 in D3std6random6rndGenFNcNdZS3std6random98__T21MersenneTwisterEngineTkVi32Vi624Vi397Vi31Vk2567483615Vi11Vi7Vk2636928640Vi15Vk4022730752Vi18Z21MersenneTwisterEngine20__T12__lambda1190TiZ12__lambda1190FiZk () #3 0x000000010002249d in D3std6random6rndGenFNcNdZS3std6random98__T21MersenneTwisterEngineTkVi32Vi624Vi397Vi31Vk2567483615Vi11Vi7Vk2636928640Vi15Vk4022730752Vi18Z21MersenneTwisterEngine225__T9MapResultS1733std6random6rndGenFNcNdZS3std6random98__T21MersenneTwisterEngineTkVi32Vi624Vi397Vi31Vk2567483615Vi11Vi7Vk2636928640Vi15Vk4022730752Vi18Z21MersenneTwisterEngine12__lambda1190TS3std5range13__T6RepeatTiZ6RepeatZ9MapResult5frontMFNdZk () #4 0x0000000100026b66 in D3std6random98__T21MersenneTwisterEngineTkVi32Vi624Vi397Vi31Vk2567483615Vi11Vi7Vk2636928640Vi15Vk4022730752Vi18Z21MersenneTwisterEngine408__T4seedTS3std6random6rndGenFNcNdZS3std6random98__T21MersenneTwisterEngineTkVi32Vi624Vi397Vi31Vk2567483615Vi11Vi7Vk2636928640Vi15Vk4022730752Vi18Z21MersenneTwisterEngine225__T9MapResultS1733std6random6rndGenFNcNdZS3std6random98__T21MersenneTwisterEngineTkVi32Vi624Vi397Vi31Vk2567483615Vi11Vi7Vk2636928640Vi15Vk4022730752Vi18Z21MersenneTwisterEngine12__lambda1190TS3std5range13__T6RepeatTiZ6RepeatZ9MapResultZ4seedMFS3std6random6rndGenFNcNdZS3std6random98__T21MersenneTwisterEngineTkVi32Vi624Vi397Vi31Vk2567483615Vi11Vi7Vk2636928640Vi15Vk4022730752Vi18Z21MersenneTwisterEngine225__T9MapResultS1733std6random6rndGenFNcNdZS3std6random98__T21MersenneTwisterEngineTkVi32Vi624Vi397Vi31Vk2567483615Vi11Vi7Vk2636928640Vi15Vk4022730752Vi18Z21MersenneTwisterEngine12__lambda1190TS3std5range13__T6RepeatTiZ6RepeatZ9MapResultZv () #5 0x00000001000265e3 in D3std6random6rndGenFNcNdZS3std6random98__T21MersenneTwisterEngineTkVi32Vi624Vi397Vi31Vk2567483615Vi11Vi7Vk2636928640Vi15Vk4022730752Vi18Z21MersenneTwisterEngine () #6 0x0000000100000fa5 in D3std6random27__T7uniformVAyaa2_5b29TdTdZ7uniformFddZd () at /Library/Compilers/dmd2/osx/bin/../../src/phobos/std/random.d:1106 #7 0x0000000100000cfa in _Dmain () at p394.d:32 #8 0x000000010001b732 in D2rt6dmain24mainUiPPaZi7runMainMFZv () #9 0x000000010001b0e9 in D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv () #10 0x000000010001b77c in D2rt6dmain24mainUiPPaZi6runAllMFZv () #11 0x000000010001b0e9 in D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv () #12 0x000000010001b073 in main () #13 0x0000000100000cb4 in start ()

Still occurs in git HEAD as of the time of this post.

Doesn't happen on Linux/64 with DMD git HEAD. Will try to test OSX on the autotester next...

Hmm. This seems to work now on git HEAD (all tested platforms), according to the autotester for this testing pull: https://github.com/D-Programming-Language/dmd/pull/4023

Yep, works for me too now. Thanks for following this one up, I forgot about it ^_^

No prob, I'm just going through old bugs looking for low-hanging fruit. :-) I have a few set queries setup to find 1-2 year old bugs and 2-10 year old bugs, so that I can look at bugs with various levels of negligence to find easy fixes. :-P

Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/f4a86d7a8d017e5348ec730960e48aef255f45a9 Add test case for issue 8671. https://github.com/D-Programming-Language/dmd/commit/6cf07a72b505615e207a5bf0ca5e0003f031ef87 Merge pull request #4023 from quickfur/issue8671 Issue 8671: Add test case for worksforme issue 8671.

Commits pushed to 2.067 at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/f4a86d7a8d017e5348ec730960e48aef255f45a9 Add test case for issue 8671. https://github.com/D-Programming-Language/dmd/commit/6cf07a72b505615e207a5bf0ca5e0003f031ef87 Merge pull request #4023 from quickfur/issue8671

dlang/phobos pull request #8209 "std.random: Add test for Issue 8671" was merged into master: - d5676dd5343ee33fd81348713f03a082643a414e by Iain Buclaw: std.random: Add test for Issue 8671 https://github.com/dlang/phobos/pull/8209

dlang/dmd pull request #13013 "test: Remove test case for issue 8671" was merged into master: - 5674c4fa3e8c70320c0f636c46660de49f61e86f by Iain Buclaw: test: Remove test case for issue 8671 This has been moved to std.random in Phobos https://github.com/dlang/dmd/pull/13013