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Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2017:2094
Description of problem: Exception from a virtual function does not get caught with 03 optimization Version-Release number of selected component (if applicable): gcc-c++.x86_64 0:4.8.5-11.el7 How reproducible: Always Steps to Reproduce: 1. namespace { struct IFoo { virtual void foo() = 0; }; struct IBar { virtual void bar() = 0; }; struct FooBar : private IBar, private IFoo { void call_foo() { try { static_cast<IFoo*>(this)->foo(); } catch( ... ) {} } void foo() { throw 1; } void bar() {} }; void test() { FooBar foobar; foobar.call_foo(); } } int main() { test(); return 0; } 2. g++ -O3 -Wall -Wextra -pedantic main.cpp && ./a.out Actual results: terminate called after throwing an instance of 'int' Expected results: No errors Additional info: This is being regression upstream 4.8.5, 5.2.0, 5.3.0 as per upstream bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68184 Works with -O0 optimization.