[llvm-bugs] [Bug 42217] New: Bad exception handling with g++/MinGW
via llvm-bugs
llvm-bugs at lists.llvm.org
Mon Jun 10 05:59:37 PDT 2019
https://bugs.llvm.org/show_bug.cgi?id=42217
Bug ID: 42217
Summary: Bad exception handling with g++/MinGW
Product: lld
Version: unspecified
Hardware: PC
OS: Windows XP
Status: NEW
Severity: enhancement
Priority: P
Component: COFF
Assignee: unassignedbugs at nondot.org
Reporter: orgads at gmail.com
CC: llvm-bugs at lists.llvm.org
When building with g++ and lld, an exception that is thrown from a ctor is not
properly caught.
This works fine on linux with both g++ and clang, and on MinGW with clang.
$ cat ex.cpp
#include <iostream>
struct exception {};
struct Foo { Foo() { throw exception(); } };
static void func() { throw exception(); }
int main()
{
try {
func();
} catch(exception &ex) { std::cout << "Caught from func" << std::endl; }
try {
Foo tmp;
} catch(exception &ex) { std::cout << "Caught from ctor" << std::endl; }
return 0;
}
$ clang++ -fuse-ld=lld -o ex.exe main.cpp
$ ./ex
Caught from func
Caught from ctor
$ g++ -fuse-ld=lld -o ex.exe main.cpp
$ ./ex
Caught from func
terminate called after throwing an instance of 'exception'
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