gdb 7.11.1-2 started within emacs fails

[Ken Brown]

On 10/12/2017 1:24 PM, Jon Turney wrote:
> On 11/10/2017 21:32, Ken Brown wrote:
>> On 10/11/2017 3:44 PM, Jon Turney wrote:
>>> On 27/09/2016 21:15, Ken Brown wrote:
>>>> On 9/27/2016 2:47 PM, Rockefeller, Harry wrote:
>>>>> Using program foo:
>>>>> Â Â Â Â Â  program foo
>>>>> Â Â Â Â Â  e = 1.0
>>>>> Â Â Â Â Â  stop
>>>>> Â Â Â Â Â  end
>>>>>
>>>>> $ /usr/bin/gfortran    -g foo.f -o foo
>>>>>
>>>>> Emacs version info: GNU Emacs 25.1.1 (i686-pc-cygwin, GTK+ Version 
>>>>> 3.18.9) of 2016-09-17
>>>>>
>>>>> Inside emacs I ran M-x gud-gdb and got
>>>>> ... GNU gdb (GDB) (Cygwin 7.11.1-2) 7.11.1 ...
>>>>> (gdb) b 1
>>>>> Breakpoint 1 at 0x4011d6: file foo.f, line 1.
>>>>> (gdb) r
>>>>> Starting program: /cygdrive/c/Users/harryr/foo.exe
>>>>> [New Thread 6296.0x22ac]
>>>>> [New Thread 6296.0x24d4]
>>>>> readline: readline_callback_read_char() called with no handler!
>>>>> Debugger aborted (core dumped)
>>>>>
>>>>> Foo written in C++ also fails with the same message.
>>>>> Running gdb foo in bash gives the expected result:
>>>>> gdb stops at first executable line prompting for next gdb command.
>>>>
>>>> I can confirm that this happens also with gdb-7.11.1-1 but not 
>>>> gdb-7.10.1-1.  (I tested on x86_64, since gdb-7.10.1-1 is broken on 
>>>> x86.)
>>>>
>>>> It also fails with M-x gdb instead of M-x gud-gdb, but with a 
>>>> different error message:
>>>>
>>>> Â Â  Failed to resume program execution (ContinueDebugEvent failed, 
>>>> error 87)
>>>
>>> These problem seem not longer occur due to upstream changes in gdb 7.12.
>>
>> Everything seems fine on x86_64 and with M-x gud-gdb on x86.  But when 
>> I run M-x gdb on x86 (even with no file), gdb crashes.
> 
> Thanks for testing.
> 
> It seems this issue is known [1], so I made a gdb 7.12.1-2 with the 
> work-around from there applied, which seems to fix M-x gdb on x86.

Confirmed.

Thanks.

Ken


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