Crash on translate (memory access violation)

We translate the text dynamically (as it described here https://wiki.qt.io/How_to_do_dynamic_translation_in_QML). After language changing from English to English US UI retranslation begins and then crash occures. Stack shows us that crash was in match function.

 FYI kileppal

Clip from the stack trace:

#0 0x0000007fa4f2540c in match (targetLen=18, target=0x33709728
"ClimateBlowerGroup", foundLen=136,
found=0x7f5184bfd5 <error: Cannot access memory at address
0x7f5184bfd5>)
at /usr/src/debug/qtbase/5.12.10+gitAUTOINC+c919fc5f65-r0/git/src/corelib/
kernel/qtranslator.cpp:102
#1 QTranslatorPrivate::do_translate (this=0x2f4e1380, context=0x33709728
"ClimateBlowerGroup", sourceText=0x31387718 "1",
comment=0x7fa500c490 <QArrayData::shared_null+24> "",
n=-1) at /usr/src/debug/qtbase/5.12.10+gitAUTOINC+c919fc5f65-r0/git/src/coreli
b/kernel/qtranslator.cpp:1001