completion fails almost always

[pedro-esteves-pinto]

Please mark appropriate

• [x] rtags (rdm/rc/rp)
• Emacs Lisp
  • [ ] ac-rtags.el
  • [x] company-rtags.el
  • [ ] helm-rtags.el
  • [ ] flycheck-rtags.el
  • [ ] ivy-rtags.el
  • [ ] rtags.el

Problem description

Completion does not work

Expected behavior

I expected a list of completions.

Actual behavior

A request for completion almost always results in the following from elisp:

Company: An error occurred in auto-begin Company: backend company-rtags async timeout with args (candidates )

I have increased the timeout to 10 secs, which is much longer than what it takes for the translation unit to compile from scratch.

Environment

• Ubuntu 17.04

• LLVM/Clang version: clang version 4.0.0-1ubuntu1 (tags/RELEASE_400/rc1)

Feature request

Describe the feature we should add to RTags.

[mkurop]

I experience the same problem. Do you solved your issue? I am trying hard to solve but with no success thus far.

[pedro-esteves-pinto]

No, to be honest rtags completion has always been very hit or miss for me.

[jwiegley]

I'm seeing this same behavior. In fact, while finding symbols appears to work fine, diagnostics and completion just seem to hang at the prompt. For example:

14:42 Vulcan:ledger $ rc --list-symbols fn_amount_
fn_amount_expr
fn_amount_expr(ledger::call_scope_t &)
fn_amount_expr(ledger::call_scope_t &)::scope

This responds almost instantly. However:

rc --synchronous-completions --code-complete-at ~/Projects/ledger/src/report.cc:1365:38

This hangs indefinitely. As does rc -m --elisp.

As a result, M-. works just fine, but neither flycheck nor company work at all.

[drrlvn]

I can get completion to work when I install using (rtags-install) but not when I use the AUR package. The rc process hangs indefinitely in that case as previously mentioned.

[myrgy]

latest 2.18 rtags - completion fails almost always. During that time emacs hangs up for a while. In rc -v -g log I can see plenty of same messages about completion request without any responses.

[casch-at]

Related to #1103, #989, and maybe #818 too

[redm123]

(adding here, as my other issue got closed as duplicate)

Just compiled a new rtags from Git and it still often fails to complete.

It seems to work pretty reliable when completing after a "." or "->" (although it seems to list private members now...). But other cases still only work sometimes. I just tried to complete a local variable after the first few chars, didn't work. Completing a vector "foo.pushb" (2nd _ is the cursor), "No completions found" ... Sometimes completion works if I indent 7, 10, 20 .. characters.

It does not hang for me though...

[casch-at]

Hey guys, Swassie has created a PR yesterday, with fix for completion in RTags. Can you guys try https://github.com/Andersbakken/rtags/commit/b6f578173e53df2d4c4560ae82087e377a4aa080, and check if it works now. Thanks!

[redm123]

First impression: That did the trick! Cool. Should this be the first time having truly working smart completion and navigation in Emacs, after all those years fighting with Cedet and what not?! :)

[casch-at]

Glad to hear that. Yeah, Cedet is a bit of a pain in the ass :-), though quit useful if you are new to Emacs, and are used to an IDE.

There are some other Clang/LLVM based parsers around, like irony, ycmd, cquery...

redm123 notifications@github.com writes:

First impression: That did the trick! Cool. Should this be the first time having truly working smart completion and navigation in Emacs, after all those years fighting with Cedet and what not?! :)

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