decompile error

== MCP v4.4 ==
> Creating Retroguard config files
== Decompiling Client ==
!! Modified jar detected. Unpredictable results !!
> Creating SRGS for client
> Applying Retroguard to client
> Applying Exceptor to client
> Unzipping the client jar
> Applying jadretro
> Decompiling...
> Applying patches
.\runtime\bin\applydiff.exe --binary -p1 -u -i ..\..\temp/temp.patch -d src/mine
craft failed.
Return code : 1

== ERRORS FOUND ==

1 out of 1 hunk FAILED -- saving rejects to file 'net\minecraft\src\RenderBlocks
.#'
==================

> Renaming sources
> Creating reobfuscation tables
> Done in 79.85 seconds
== Decompiling Server ==
> Creating SRGS for server
> Applying Retroguard to server
> Applying Exceptor to server
> Unzipping the server jar
> Applying jadretro
> Decompiling...
> Applying patches
> Renaming sources
> Creating reobfuscation tables
> Done in 50.75 seconds
== Post decompiling operations ==
> Recompiling
> Recompiling client...
> Done in 11.05 seconds
> Recompiling server...
> Done in 8.33 seconds
> Generating the md5 (client)
> Generating the md5 (server)
Press any key to continue . . .