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Manishearth opened this issue Jan 9, 2015 · 5 comments · Fixed by #21970
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Error building rust with -g #20798

Manishearth opened this issue Jan 9, 2015 · 5 comments · Fixed by #21970
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A-debuginfo Area: Debugging information in compiled programs (DWARF, PDB, etc.)

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@Manishearth
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rustc: /home/rustbuild/src/rust-buildbot/slave/snap3-linux/build/src/llvm/lib/IR/DebugInfo.cpp:159: uint64_t llvm::DIVariable::getPieceOffset() const: Assertion `isVariablePiece()' failed.
Aborted (core dumped)
make: *** [x86_64-unknown-linux-gnu/stage0/lib/rustlib/x86_64-unknown-linux-gnu/lib/stamp.rustc_typeck] Error 134

(I was running RUSTFLAGS="-g" CFG_RUSTC_FLAGS="-g" make -j4, since I forgot which flag works)

I get the same error even after a make clean.
@huonw huonw added the A-debuginfo Area: Debugging information in compiled programs (DWARF, PDB, etc.) label Jan 9, 2015
@huonw
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huonw commented Jan 9, 2015

cc @michaelwoerister

@michaelwoerister
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Seems to be something related to the recent LLVM updates. It's on my radar.

@michaelwoerister michaelwoerister mentioned this issue Jan 14, 2015
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@michaelwoerister michaelwoerister mentioned this issue Jan 22, 2015
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@michaelwoerister
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Update: It's likely that this particular assertion failure has been resolved by the recent LLVM update. However, I'm hitting a new error now, which seems to be a regression of #17201. I'm looking into it right now.

@michaelwoerister
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👏 Alright! 👍
With a quick and dirty fix assigning debug locations to lang-time call instructions the regression is gone and isVariablePiece() assertion too. It'll take some time to implement a clean fix but then this issue should be solved.

@steveklabnik
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🎊

@michaelwoerister michaelwoerister mentioned this issue Feb 5, 2015
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bors added a commit that referenced this issue Feb 8, 2015
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Auto merge of #21970 - michaelwoerister:lang-item-call-debug-locs, r=…
d4a66e9 
…brson

Resolves some issues caused by the recent LLVM update (which itself solved some issues).

Closes #19848
Closes #20798
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debuginfo: Solve several problems when compiling Rust with -g michaelwoerister/rust
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@steveklabnik @huonw @Manishearth @michaelwoerister