Question to Arduino Beta 1.9

Hello,

i have a question about the beta version 1.9.

I cannot compile my libraries with this version. "LCDMenuLib" and "LCDMenuLib2".
With Version 1.8.5 it works without any error messages.

A possible error message on LCDMenuLib2 is this:

"...xyz...\arduino-PR-beta1.9-BUILD-31\hardware\tools\avr/bin/avr-g++" -c -g -Os -Wall -Wextra -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD -flto -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10900 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR   "-I...xyz...\arduino-PR-beta1.9-BUILD-31\hardware\arduino\avr\cores\arduino" "-I...xyz...\arduino-PR-beta1.9-BUILD-31\hardware\arduino\avr\variants\mega" "-I...xyz...\Arduino\libraries\LCDMenuLib2\src" "...xyz...\arduino_build_632023\sketch\LCDML_000_serialMonitor.ino.cpp" -o "...xyz...\arduino_build_632023\sketch\LCDML_000_serialMonitor.ino.cpp.o"
LCDML_000_serialMonitor:80:88: error: stray '#' in program

     Serial.begin(9600);                // start serial    
                                                                                        ^

"...xyz..." is a placeholder for my folder structure

Can someone help me ?

Thanks for reporting this! I have submitted a bug report here: