[llvm-bugs] [Bug 33347] New: [MSAN] getShadow(llvm::Value *): Assertion `Shadow && "No shadow for a value"' failed with coroutines

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33347

            Bug ID: 33347
           Summary: [MSAN] getShadow(llvm::Value *): Assertion `Shadow &&
                    "No shadow for a value"' failed with coroutines
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Transformation Utilities
          Assignee: unassignedbugs at nondot.org
          Reporter: eric at efcs.ca
                CC: llvm-bugs at lists.llvm.org

Reproducer script + preprocessed source:
https://gist.github.com/EricWF/ca017912f403db1959b3f3882ecd71b2

The code above causes the following assertion when compiled with:
-fsanitize=memory -O2 -g -fcoroutines-ts

llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp:1099: llvm::Value
*(anonymous namespace)::MemorySanitizerVisitor::getShadow(llvm::Value *):
Assertion `Shadow && "No shadow for a value"' failed.

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