| Summary: | Segmentation fault on a simple template class; no segfault if substitute class by structure | ||
|---|---|---|---|
| Product: | GDC | Reporter: | Alexander Samoilov <alexander.samoilov> |
| Component: | gdc | Assignee: | Iain Buclaw <ibuclaw> |
| Status: | RESOLVED INVALID | ||
| Severity: | normal | CC: | alexander.samoilov, art.08.09 |
| Priority: | --- | ||
| Version: | 4.7.x | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Attachments: | the code that segfaults | ||
The D class reference ("slicer" in your code) is null and all methods in D are virtual (except private/final ones) - trying to call them with a null ref will fail - there's no compiler bug here.
Thanks for clarification. Nice to hear that it isn't a compiler bug. |
Created attachment 15 [details] the code that segfaults Dear Developers, The following simple code produces segfault with both gdc 4.7 and latest dmd: --------------------------------------------------------------------------- /*struct*/ class bits(int MSB, int LSB) { enum { msb = MSB, lsb = LSB, span = MSB-LSB+1, } static const ulong mask = (1L << span) - 1; ulong slice(ulong val) const { return ((val >> lsb) & mask); } } import std.stdio; void main() { ulong a = 0xFEE0DDF00D; bits!(28,12) slicer; auto sliced = slicer.slice(a); writefln("slicer(28,12) : %X",slicer.slice(a)); } --------------------------------------------------------------------------- There will not be segfault if substitute 'class' by 'struct' or declare method bits::slice as static (as 'static ulong slice(ulong val) { return ((val >> lsb) & mask);' } ). Thanks, Alexander