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Fix a crash when opening pro file (Qt6 build)

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When move c'tor of ProFunctionDef was introduced
it became possible, that m_pro may be NULL.
In this case we need to destruct this invalid state
of ProFunctionDef in a special way: we ensure,
that m_pro is not null before calling deref().

Amends: bf5cc934ea

Cherry-picks: 907923b7cafad8cff6f0f5c8764e9181ac1531bd from qtbase
Task-number: QTCREATORBUG-24840
Change-Id: I5b2643f2241407101dbf95a8d6ea9974cf8ae6ea
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
This commit is contained in:
Jarek Kobus
2020-11-23 23:03:48 +01:00
parent 038cac9fe6
commit a3926b282e
1 changed files with 3 additions and 2 deletions
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5
src/shared/proparser/proitems.h
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@@ -421,11 +421,12 @@ public:
ProFunctionDef(const ProFunctionDef &o) : m_pro(o.m_pro), m_offset(o.m_offset) { m_pro->ref(); }
ProFunctionDef(ProFunctionDef &&other) Q_DECL_NOTHROW
: m_pro(other.m_pro), m_offset(other.m_offset) { other.m_pro = nullptr; }
~ProFunctionDef() { m_pro->deref(); }
~ProFunctionDef() { if (m_pro) m_pro->deref(); }
ProFunctionDef &operator=(const ProFunctionDef &o)
{
if (this != &o) {
m_pro->deref();
if (m_pro)
m_pro->deref();
m_pro = o.m_pro;
m_pro->ref();
m_offset = o.m_offset;