Rtags-diagnostics blank with clang 7.0.1 and gcc 8.3.1

[deuscovrigus]

• RTags(rdm,rc): [2.38.131]
• Emacs: [26.3]
• LLVM/Clang: [e.g. 7.0.1] when i invoke rtags-diagnostics in my emacs client with one of the rtags sources (as an arbitrary test) the console output shows /usr/local/bin/rc --current-file=/proj/rtags/src/ -b -z -t128 --is-indexing while the rtags-diagnostics buffer is completely empty

Completion however seems to work when I attempt to code complete a snippet: /usr/local/bin/rc --current-file=/proj/rtags/src/ClassHierarchyJob.cpp -b --unsaved-file=/proj/rtags/src/ClassHierarchyJob.cpp:/tmp/7RGQF6 -z -t128 --code-complete-at /home/prj/rtags/src/ClassHierarchyJob.cpp:3│·································································································································· 2:12: --synchronous-completions --elisp

With llvm 6.0 and gcc 7.3.0 the diagnostics work as expected (tried in a docker)

[zhihuiFan]

I can get the blank result and I'm using clang 7.0.1 as well. However it works just some days before, just doesn't works today.

[zhihuiFan]

I can get the blank result and I'm using clang 7.0.1 as well. However it works just some days before, just doesn't works today.

I get blank just because I fixed all of warning/errors... And the reason I think I should have got an warning is because sth like this:

#include <stdio.h>
#include <stdlib.h>

struct X
{
    int a;
    int b;
};

int main(int argc, char *argv[])
{
    struct X x;
    printf("Hi x=%d", x.a);
    return 0;
}

x is uninitialized.

/u/y/g/cdemo> /usr/local/bin/cc -Wall -c -o /u01/yizhi/github/cdemo/CMakeFiles/main.dir/main.c.o 

/u01/github/cdemo/main.c: In function ‘main’:
/u01/github/cdemo/main.c:13:5: warning: ‘x.a’ is used uninitialized in this function [-Wuninitialized]
     printf("Hi x=%d", x.a);
     ^~~~~~~~~~~~~~~~~~~~~~

with clang 7.0.1, it get blank.