Re: Understanding SIGSEGV issues
On Thursday, 3 January 2019 at 06:25:46 UTC, Russel Winder wrote: So I have a D program that used to work. I come back to it, recompile it, and: [...] __GI___libc_free (mem=0xa) at malloc.c:3093 You've tried to free a pointer that, while not null, was derived from a pointer that was, i.e. an offset to a field of a struct. A backtrace would help a lot, otherwise it really is just guessing.
Understanding SIGSEGV issues
So I have a D program that used to work. I come back to it, recompile it, and: |> dub run -- ~/lib/DigitalTelevision/DVBv5/uk-CrystalPalace__RW Performing "debug" build using /usr/bin/ldc2 for x86_64. libdvbv5_d 0.1.1: target for configuration "library" is up to date. dvb-tune ~master: target for configuration "application" is up to date. To force a rebuild of up-to-date targets, run again with --force. Running ./bin/dvb-tune /home/users/russel/lib/DigitalTelevision/DVBv5/uk-CrystalPalace__RW Device: Silicon Labs Si2168, adapter 0, frontend 0 Program exited with code -11 (gdb) r ~/lib/DigitalTelevision/DVBv5/uk-CrystalPalace__RW Starting program: /home/users/russel/Repositories/Git/Masters/Public/DVBTune/bin/dvb-tune ~/lib/DigitalTelevision/DVBv5/uk-CrystalPalace__RW [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Device: Silicon Labs Si2168, adapter 0, frontend 0 Program received signal SIGSEGV, Segmentation fault. __GI___libc_free (mem=0xa) at malloc.c:3093 3093malloc.c: No such file or directory. (gdb) Can anyone give me any hints as to where to start even getting a glimmer of an understanding of WTF is going on? -- Russel. === Dr Russel Winder t: +44 20 7585 2200 41 Buckmaster Roadm: +44 7770 465 077 London SW11 1EN, UK w: www.russel.org.uk signature.asc Description: This is a digitally signed message part
Re: Vibe.d throw link error
On Thursday, 3 January 2019 at 00:23:50 UTC, greatsam4sure wrote: On Wednesday, 2 January 2019 at 21:46:57 UTC, bauss wrote: Error: linker exit with status 1 Dmd failed with exit code 1 This is all the compiler emit Windows 10 --- got it VibeD project --- got it Error --- got it What exactly were you trying to do? What you have given so far offers no incite. Try providing a bit more information, offending code, cli command and associated arguments used, etc...
Re: Vibe.d throw link error
On Wednesday, 2 January 2019 at 21:46:57 UTC, bauss wrote: Error: linker exit with status 1 Dmd failed with exit code 1 This is all the compiler emit
Vibe.d throw link error
I am using windows 10. I could not run vibe project. It just give me the error: Error: linker exit with status 1 Dmd failed with exit code 1 I have use different dmd from 0.080 till 0.083. The same error. What is the possible cause and solution to this error?
Re: Two questions
On Wednesday, 2 January 2019 at 17:49:52 UTC, H. S. Teoh wrote:
On Wed, Jan 02, 2019 at 05:38:41PM +, IM via
Digitalmars-d-learn wrote:
1- How do I do in D the equivalent of the following C++ macro?
#define OUT_VAL(val) (count << #val << " = " << val << endl)
In particular the #val above to the actual macro argument as a
string?
[...]
Try something along these lines:
import std.stdio;
void OUT_VAL(alias val)() {
writefln("%s = %s", __traits(identifier, val), val);
}
void main() {
int i = 123;
string s = "abc";
OUT_VAL!i;
OUT_VAL!s;
}
T
Thank you so much. Will give this a try.
Re: Two questions
On Wednesday, 2 January 2019 at 21:56:03 UTC, Steven
Schveighoffer wrote:
On 1/2/19 12:38 PM, IM wrote:
[...]
With those ... I have to guess.
There are 2 possibilities.
Possibility 1: there is a method named 'doSomeWork' which takes
at least one parameter. This overrides the UFCS function
(member functions always win over UFCS).
Possibility 2: All this is actually inside a function or
unittest. Nested functions cannot participate in UFCS.
Perfect, this was it. Thank you so much. doSomeWork() was nested
inside a unittest{} block. I didn't know UFCS won't work in this
case.
Of course, these are guesses. But given the very scant code
above, I'm not sure I could offer any other suggestions. If
neither of those is the case, I'd need a working example.
-Steve
Re: Two questions
On 1/2/19 12:38 PM, IM wrote:
2- Yesterday I was experimenting with something and I wrote something
like the following:
struct MyType {
...
}
void doSomeWork(ref MyType o) {
...
}
auto t = MyType(...);
t.doSomeWork(); // <-- failed to compile.
Why did the above UFCS call fail to compile? I had to do doSomeWork(t)
instead.
With those ... I have to guess.
There are 2 possibilities.
Possibility 1: there is a method named 'doSomeWork' which takes at least
one parameter. This overrides the UFCS function (member functions always
win over UFCS).
Possibility 2: All this is actually inside a function or unittest.
Nested functions cannot participate in UFCS.
Of course, these are guesses. But given the very scant code above, I'm
not sure I could offer any other suggestions. If neither of those is the
case, I'd need a working example.
-Steve
Re: Vibe.d throw link error
On Wednesday, 2 January 2019 at 20:52:26 UTC, greatsam4sure wrote: I am using windows 10. I could not run vibe project. It just give me the error: Error: linker exit with status 1 Dmd failed with exit code 1 I have use different dmd from 0.080 till 0.083. The same error. What is the possible cause and solution to this error? Some more information would be useful. Compiler flags, dub configuration and OS.
Vibe.d throw link error
I am using windows 10. I could not run vibe project. It just give me the error: Error: linker exit with status 1 Dmd failed with exit code 1 I have use different dmd from 0.080 till 0.083. The same error. What is the possible cause and solution to this error?
Re: Two questions
On Wed, Jan 02, 2019 at 05:38:41PM +, IM via Digitalmars-d-learn wrote:
> 1- How do I do in D the equivalent of the following C++ macro?
>
> #define OUT_VAL(val) (count << #val << " = " << val << endl)
>
> In particular the #val above to the actual macro argument as a string?
[...]
Try something along these lines:
import std.stdio;
void OUT_VAL(alias val)() {
writefln("%s = %s", __traits(identifier, val), val);
}
void main() {
int i = 123;
string s = "abc";
OUT_VAL!i;
OUT_VAL!s;
}
T
--
The easy way is the wrong way, and the hard way is the stupid way. Pick one.
Two questions
1- How do I do in D the equivalent of the following C++ macro?
#define OUT_VAL(val) (count << #val << " = " << val << endl)
In particular the #val above to the actual macro argument as a
string?
2- Yesterday I was experimenting with something and I wrote
something like the following:
struct MyType {
...
}
void doSomeWork(ref MyType o) {
...
}
auto t = MyType(...);
t.doSomeWork(); // <-- failed to compile.
Why did the above UFCS call fail to compile? I had to do
doSomeWork(t) instead.
Thank you so much!
Re: Weird combo of static function, templates, interfaces (that doesn't link)
On Sunday, 30 December 2018 at 18:55:10 UTC, Ali Çehreli wrote:
On 12/30/2018 05:05 AM, 0xEAB wrote:
>> interface FooAdapter
>> {
>> FooBundle!(Handle) createSome(Handle)();
>> }
Function templates cannot be virtual functions. One reason is
the compiler cannot know how large the virtual function table
should be, and the other one is it's just a template, not the
real thing (i.e. not a function).
>> private class SomeAdapter : FooAdapter
>> {
>> Bundle createSome()
SomeAdapter.createSome is a function unrelated to
FooAdapter.createSome. Their only relationship is through "name
hiding."
> - Does `SomeAdapter` even implement `FooAdapter` correctly?
Yes because FooAdapter has no virtual function. :p
> ~ Elias
Ali
Thanks for the technical explanation.
~ Elias
Re: Mysteries of the Underscore
On Monday, 24 December 2018 at 16:53:57 UTC, Neia Neutuladh wrote: I once, in my callow days, wrote a unittest with variables named _, __, ___, etc. It did not pass code review, but it did amuse.
Re: D-oriented Syntax Highlighting Plugin for WordPress?
On Wednesday, 2 January 2019 at 02:09:11 UTC, Mike Parker wrote: It supports D out of the box. Thanks, Mike. Once I downloaded it and dug around, I found the list of supported languages. Odd they don't list these on the about page or wherever.
Re: Low order hashes
On 1/1/19 2:40 PM, Michelle Long wrote: I need to hash a few strings to a byte, short, or int. hashOf works for int only on x86. What would be a nice way to accomplish this? Collisions are not good but not catastrophic. Mainly I need a unique ID to emulate enums. I might just chop off the extra bits or mash them up somehow and it will probably work but hoping for something more solid. Not from experience, but just thinking out loud, you could take the int and xor the parts together. in other words: auto x = hashOf(y); ushort realHash = (x ^ (x >> 16)) & 0x; ubyte would be 4 terms, but still not too bad. -Steve
