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Subject: Re: gdb 7.11.1-2 started within emacs fails
To: cygwin AT cygwin DOT com
References: <d4a9e76c90c44c7cb0fa915a2589c0f6 AT vsrv060ex03 DOT ssd DOT fsi DOT com>
From: Ken Brown <kbrown AT cornell DOT edu>
Message-ID: <207e93bf-8f7e-57a3-1abc-cc645c79020c@cornell.edu>
Date: Tue, 27 Sep 2016 16:15:51 -0400
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On 9/27/2016 2:47 PM, Rockefeller, Harry wrote:
> Using program foo:
>       program foo
>       e = 1.0
>       stop
>       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:

   Failed to resume program execution (ContinueDebugEvent failed, error 87)

Ken

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