Re: Commit 76eda952b0 on master causes emacs crash on Windows during build

[Andy Moreton <andrewjmoreton@gmail.com>]

On Thu 28 Jun 2018, Eli Zaretskii wrote:

>> From: Andy Moreton <andrewjmoreton@gmail.com>
>> Date: Thu, 28 Jun 2018 20:04:04 +0100
>> 
>> 
>> (gdb) bt full
>> #0  0x00007ffb85c2c903 in KERNELBASE!DebugBreak () from C:\WINDOWS\System32\KernelBase.dll
>> No symbol table info available.
>> #1  0x000000040029e289 in emacs_abort () at C:/emacs/git/emacs/master/src/w32fns.c:10755
>>         button = 0x6
>> #2 0x0000000400129993 in terminate_due_to_signal (sig=0x16,
>> backtrace_limit=0x7fffffff) at C:/emacs/git/emacs/master/src/emacs.c:399
>> No locals.
>> #3 0x00000004001c22b5 in die (msg=0x40070f328 <DEFAULT_REHASH_SIZE+376>
>> "specpdl_ptr->kind == SPECPDL_UNWIND_PTR && specpdl_ptr->unwind_ptr.func ==
>> xfree", file=0x40070ed38 <Qzlib+8> "C:/emacs/git/emacs/master/src/lisp.h",
>> line=0x11c3) at C:/emacs/git/emacs/master/src/alloc.c:7294
>> No locals.
>> #4  0x000000040012666a in safe_free (sa_count=0x54) at C:/emacs/git/emacs/master/src/lisp.h:4546
>
> What is the value of specpdl_ptr->kind when it aborts?

(gdb) frame 4
#4  0x000000040012666a in safe_free (sa_count=0x54) at C:/emacs/git/emacs/master/src/lisp.h:4546
4546          eassert (specpdl_ptr->kind == SPECPDL_UNWIND_PTR
(gdb) p specpdl_ptr->kind
$1 = SPECPDL_UNWIND_ARRAY