Crash when opening dhcpd.conf.5

1) Save https://github.com/mirroring/dhcp/blob/v4_3/server/dhcpd.conf.5
2) Open this file in Creator (by dragging to the editor or via the file menu)
3) Qt Creator crashes

Backtrace: https://gist.github.com/roycyt/6b571c6583ff4af40940ee3fdbf0af4c

Thread 1 "qtcreator" received signal SIGSEGV, Segmentation fault.
0x0000000000000018 in ?? ()
(gdb) bt
#0 0x0000000000000018 in ?? ()
#1 0x00007fffe2f08ff7 in TextEditor::Internal::Rule::progressFinished (this=0x27cca90) at ../../../../qt-creator/src/plugins/texteditor/generichighlighter/rule.cpp:184
#2 0x00007fffe2f0c19c in TextEditor::Internal::ProgressData::~ProgressData (this=0x2816200, __in_chrg=<optimized out>)
at ../../../../qt-creator/src/plugins/texteditor/generichighlighter/progressdata.cpp:44
#3 0x00007fffe2f12d61 in TextEditor::Highlighter::highlightBlock (this=0x2139920, text=...)
at ../../../../qt-creator/src/plugins/texteditor/generichighlighter/highlighter.cpp:231
#4 0x00007fffe2efe0e0 in TextEditor::SyntaxHighlighterPrivate::reformatBlock (this=0x21380f0, block=..., from=0, charsRemoved=0, charsAdded=130562)
at ../../../../qt-creator/src/plugins/texteditor/syntaxhighlighter.cpp:219
#5 0x00007fffe2efdf64 in TextEditor::SyntaxHighlighterPrivate::reformatBlocks (this=0x21380f0, from=0, charsRemoved=0, charsAdded=130562)
at ../../../../qt-creator/src/plugins/texteditor/syntaxhighlighter.cpp:198
#6 0x00007fffe2f004f6 in TextEditor::SyntaxHighlighterPrivate::rehighlight (this=0x21380f0, cursor=..., operation=QTextCursor::End)
at ../../../../qt-creator/src/plugins/texteditor/syntaxhighlighter.cpp:63