GNU make 4.2 (and 4.2.1) on windows - bug?

I want to move to make 4.2 so I can have the ability to do parallel jobs on Windows using --jobs=N.

make 4.2 is not available in binary form from SourceForge, only 3.81

So I had to build it from source - they included a VS studio project - and I was up and running.

Problem is, it appears to have a bug though it could be a bug with my makefile.

I ran make4.2 all --print-data-base --debug=vjm on my project and I got ERRORS. What's unfortunate is that the error is NOT related to syntax of rules as this project builds without error on make 3.81 using the same options.

Here is the command it fails on.

COPY_DIR      = cp -f -R
MKDIR         = mkdir -p

deploy_marketProperties: deploy_themeMappingConfig
    @echo Copying application data... && $(MKDIR) "C:/Users/User1/Desktop/TargetDir" && $(COPY_DIR) $(wildcard C:/Users/User1/Desktop/Source/*) "C:/Users/User1/Desktop/TargetDir"

1. Creates a directory
2. Copies bunch of files from one directory to that new directory

Used the same make call for both versions of make: make all --print-data-base --debug=vjm

However, I get the following error when using make4.2:

Copying application data...
cp: target `C' is not a directory
makev42[3]: *** [Makefile:383: deploy_marketProperties] 

The command it tried running was:

echo Copying application data... && mkdir -p "C:/Users/User1/Desktop/TargetDir" && cp -f -R C:/Users/User1/Desktop/Source/im.json "C:/Users/User1/Desktop/TargetDir"

There's actually 264 .json files but I only show one for readability.

Again, this runs fine on make v3.81 using exact same command-line options.

It appears make 4.2 has a problem parsing that huge list of files maybe??

The question

Is there something I can change with my makefiles to make it run on make v4.2?

We are highly motivated to make it work with a 4.0+ version of make. Otherwise we have to use a build tool that will cost $$.

UPDATE 1

Per the suggestion of @MadScientist, I have executed both versions of make and present the outputs.

C:release>make381 deploy_marketProperties --debug=vjm > 381.err 2>&1

C:release>make42 deploy_marketProperties --debug=vjm > 42.err 2>&1

The target deploy_marketProperties has the following rule:

deploy_marketProperties: 
    echo Copying application data... && $(MKDIR) "C:/Users/User1/Desktop/A/Project/src/../lib/armle-v7/release/marketProperties" && $(COPY_DIR) $(wildcard C:/Users/User1/Desktop/A/Project/src/dir1/marketProperties/*) "C:/Users/User1/Desktop/A/Project/src/../lib/armle-v7/release/marketProperties"

The output of make v 3.81. NOTE: there's actually 264 .json files and total number of characters that make up the list of .json files, including ONE white space per file, is 18251 (in case that's relevant):

GNU Make 3.81
Copyright (C) 2006  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

This program built for Windows32
find_and_set_shell path search set default_shell = C:/QNX650/host/win32/x86/usr/bin/sh.exe
Reading makefiles...
Reading makefile `Makefile'...
Updating goal targets....
Considering target file `deploy_marketProperties'.
 File `deploy_marketProperties' does not exist.
 Finished prerequisites of target file `deploy_marketProperties'.
Must remake target `deploy_marketProperties'.
echo Copying application data... && mkdir -p "C:/Users/User/Desktop/A/Project/src/../lib/armle-v7/release/marketProperties" && cp -f -R C:/Users/User/Desktop/A/Project/src/fordhmi/marketProperties/2blank.json C:/Users/User/Desktop/A/Project/src/fordhmi/marketProperties/3blank.json  "C:/Users/User/Desktop/A/Project/src/../lib/armle-v7/release/marketProperties"
Main thread handle = 0x000000ac
Copying application data...
Successfully remade target file `deploy_marketProperties'.

The output of make v 4.2. NOTE: there's actually 264 .json files and total number of characters that make up the list of .json files, including ONE white space per file, is 18251 (in case that's relevant):

GNU Make 4.2
Built for Windows32
Copyright (C) 1988-2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
find_and_set_shell() path search set default_shell = C:/QNX650/host/win32/x86/usr/bin/sh.exe
Reading makefiles...
Reading makefile 'Makefile'...
Updating makefiles....
Updating goal targets....
Considering target file 'deploy_marketProperties'.
 File 'deploy_marketProperties' does not exist.
 Finished prerequisites of target file 'deploy_marketProperties'.
Must remake target 'deploy_marketProperties'.
echo Copying application data... && mkdir -p "C:/Users/User1/Desktop/A/Project/src/../lib/armle-v7/release/marketProperties" && cp -f -R C:/Users/User1/Desktop/A/Project/src/SubProj/marketProperties/im.json C:/Users/User1/Desktop/A/Project/src/SubProj/marketProperties/da.json  "C:/Users/User1/Desktop/A/Project/src/../lib/armle-v7/release/marketProperties"
Main thread handle = 00000088
Copying application data...
cp: target `C' is not a directory
make_msvc.net2003: *** [Makefile:384: deploy_marketProperties] Error 1

Note that both make versions use the same shell:

C:UsersUser1DesktopAProjectbldarmle-v7releasesubProj>where sh
C:QNX650hostwin32x86usrbinsh.exe

C:UsersUser1DesktopAProjectbldarmle-v7releasesubProj>sh --help
GNU bash, version 3.1.17(1)-release-(i686-pc-msys)
Usage:  sh [GNU long option] [option] ...
        sh [GNU long option] [option] script-file ...
GNU long options:
        --debug
        --debugger
        --dump-po-strings
        --dump-strings
        --help
        --init-file
        --login
        --noediting
        --noprofile
        --norc
        --posix
        --protected
        --rcfile
        --restricted
        --verbose
        --version
        --wordexp
Shell options:
        -irsD or -c command or -O shopt_option          (invocation only)
        -abefhkmnptuvxBCHP or -o option
Type `sh -c "help set"' for more information about shell options.
Type `sh -c help' for more information about shell builtin commands.
Use the `bashbug' command to report bugs.

NOTE THE msys @MadScientist; is that relevant?

UPDATE 2

I re-ran make 4.2 but I deleted all but ONE .json file in the directory and - surprise! - it works.

This is the ENTIRE output from make42 deploy_marketProperties --debug=vjm:

GNU Make 4.2
Built for Windows32
Copyright (C) 1988-2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
find_and_set_shell() path search set default_shell = C:/QNX650/host/win32/x86/usr/bin/sh.exe
Reading makefiles...
Reading makefile 'Makefile'...
Updating makefiles....
Updating goal targets....
Considering target file 'deploy_marketProperties'.
 File 'deploy_marketProperties' does not exist.
 Finished prerequisites of target file 'deploy_marketProperties'.
Must remake target 'deploy_marketProperties'.
echo Copying application data... && mkdir -p "C:/Users/User1/Desktop/A/Project/src/../lib/armle-v7/release/marketProperties" && cp -f -R C:/Users/User1/Desktop/A/Project/src/subProject/marketProperties/2blank.json "C:/Users/User1/Desktop/A/Project/src/../lib/armle-v7/release/marketProperties"
Main thread handle = 000000B4
Copying application data...
Successfully remade target file 'deploy_marketProperties'.

UPDATE 3

I tried it with make 4.2.1 and I got the exact same behavior as on make 4.2: fails when there are hundreds of .json files but succeeds if there less than some magic number of characters.

I got this message during one of my trials:

cp: target `C:/Users/User1/Des' is not a directory

Obviously it's getting cut-off but why? Same shell being used and only variable is version of make.