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digitalmars.D.bugs - [Issue 20421] New: Exceptions don't work when linking through lld-link


          Issue ID: 20421
           Summary: Exceptions don't work when linking through lld-link
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: major
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: r.sagitario gmx.de

import std.stdio;
void main(){
    try    {
        throw new Exception("first");
    } catch (Exception e)    {
        writeln("catch ", e.msg);

Building this with against the mingw libs with

 dmd.exe -m32mscoff test.d -mscrtlib=msvcrt100
generates an executable that doesn't produce any output, but silently crashes. When run in a debugger, it reports: Unhandled exception at 0x004010EF in x.exe: 0xC00001A5: An invalid exception handler routine has been detected (parameters: 0x00000001). This seems to happen when lld is used instead of the Microsoft linker. Using lld from LLVM 9 spits out errors "not compatible with SEH", but links using /SAFESEH:NO. The resulting executable then works. --
Nov 26 2019