Hello!

Could you create a ticket about this with all the relevant details (OS X version, boot ghc version, commit, hadrian command, etc), and the 'hadrian' label? You should even feel free to mention @snowleopard and @alp there.

Cheers

I'm trying to isolate the commit that's causing this, but the deal is on MacOS I'm seeing stage1 `ld` crashes linking `HStime`:
```

0  0x1052e2748  __assert_rtn + 129

1  0x1052be30f  ld::Fixup::Fixup(unsigned int, ld::Fixup::Cluster, ld::Fixup::Kind, bool, char const*) + 95

2  0x1052e8736  mach_o::relocatable::Parser<x86_64>::addFixup(mach_o::relocatable::Parser<x86_64>::SourceLocation const&, ld::Fixup::Cluster, ld::Fixup::Kind, bool, char const*) + 34

3  0x1052eaa9c  mach_o::relocatable::Section<x86_64>::addRelocFixup(mach_o::relocatable::Parser<x86_64>&, macho_relocation_info<Pointer64<LittleEndian> > const*) + 1722

4  0x1052ff61b  mach_o::relocatable::Section<x86_64>::makeFixups(mach_o::relocatable::Parser<x86_64>&, mach_o::relocatable::Parser<x86_64>::CFI_CU_InfoArrays const&) + 105

5  0x1052faa66  mach_o::relocatable::Parser<x86_64>::parse(mach_o::relocatable::ParserOptions const&) + 2120

6  0x1052f1250  mach_o::relocatable::Parser<x86_64>::parse(unsigned char const*, unsigned long long, char const*, long, ld::File::Ordinal, mach_o::relocatable::ParserOptions const&) + 282

7  0x10534352a  ld::tool::InputFiles::makeFile(Options::FileInfo const&, bool) + 808

8  0x105345f22  ld::tool::InputFiles::parseWorkerThread() + 530

9  0x7fff70a6b2eb  _pthread_body + 126

10  0x7fff70a6e249  _pthread_start + 66

A linker snapshot was created at:

/tmp/HStime-1.9.2.o-2019-04-22-132113.ld-snapshot

ld: Assertion failed: (name != NULL), function Fixup, file /Library/Caches/com.apple.xbs/Sources/ld64/ld64-450.3/src/ld/ld.hpp, line 724.
```
I can replicate this on multiple machines and different versions of xcode command line tools.

Any ideas?

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Shayne Fletcher
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