[BUG]: 3.1.4: cmd -> bash -> mintty yields Windows exception

[Hans-Bernhard Bröker]

Am 21.02.2020 um 18:22 schrieb David Rothenberger:
> With cygwin 3.1.4, I get an "exception c0000005" when I perform the
> following actions:
> 
> 1. Use the Windows run box to start a cmd shell
> 2. From there, run "bash". (I'm sure it is the Cygwin bash.)

How did you make sure of that?  The output of "where bash" might 
surprise you.  On this box, e.g., I have:

C:\Users\hbbro>where bash
C:\Windows\System32\bash.exe

C:\Users\hbbro>bash
hbbro@NB5:/mnt/c/Users/hbbro$ uname -a
Linux NB5 4.4.0-18362-Microsoft #476-Microsoft Fri Nov 01 16:53:00 PST 
2019 x86_64 GNU/Linux

But let's assume I did actually start Cygwin bash.

> 3. From there, run "mintty"

C:\Users\hbbro>\cygwin64\bin\bash

hbbro@NB5 /cygdrive/c/Users/hbbro
$ mintty
bash: mintty: command not found

So running "mintty" doesn't actually work at all.  But let's assume I 
start Mintty in a way that actually works in this context:

hbbro@NB5 /cygdrive/c/Users/hbbro
$ /usr/bin/mintty


Works just fine.  Mintty starts up, all is fine.

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