| Issue |
177852
|
| Summary |
crash when section has `.cfg_startproc` but no `.cfg_endproc`
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
folkertdev
|
LLVM crashes on this program
https://godbolt.org/z/9W51vc3bW
```llvm
module asm ".pushsection .text.foo,\22ax\22, @progbits"
module asm ".type foo, @function"
module asm "foo:"
module asm ".cfi_startproc"
module asm ".popsection"
module asm ".type bar, @function"
module asm "bar:"
module asm ".cfi_startproc"
module asm ".cfi_endproc"
```
```
llc: /root/llvm-project/llvm/lib/MC/MCExpr.cpp:223: llvm::MCSymbolRefExpr::MCSymbolRefExpr(const llvm::MCSymbol*, llvm::MCExpr::Spec, const llvm::MCAsmInfo*, llvm::SMLoc): Assertion `Symbol' failed.
```
This assembly is malformed (but in a way that might come up during development). When the `.popsection` is removed, we actually get a nice error:
```
<inline asm>:8:1: error: starting new .cfi frame before finishing the previous one
.cfi_endproc
^
Compiler returned: 1
```
I think that `.popsection` should emit an error when the section opened a CFI scope that wasn't yet closed.
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