[fpc-pascal] Incorrect IDE Messages error line

[Alexey Tor.]

Compile Project, Mode: linux x64 qt5, Target: 
builds/linux-x64-qt5/cudatext: Exit code 1, Errors: 3
Error: /home/user/lazarus/lcl/units/x86_64-linux/qt5/qtwidgets.o: In 
function `SETTEXTHINT':
Error: /home/user/lazarus/lcl/interfaces//qt5/qtwidgets.pas:10156: 
undefined reference to `QTextEdit_setPlaceholderText'
cudatext.lpr(37,1) Error: Error while linking

See double // before 'qt5' in last file path?
IDE cannot jump to that file from Messages window.

user at user-Notebook:~/fpcupdeluxe/fpc/bin/x86_64-linux$ ./fpc
Free Pascal Compiler version 3.3.1-r43118 [2019/10/04] for x86_64

-- 
Regards,
Alexey