[LLVMbugs] [Bug 23001] New: RecordLayoutBuilder.cpp:1854: void (anonymous namespace)::RecordLayoutBuilder::UpdateAlignment(clang::CharUnits, clang::CharUnits): Assertion `llvm::isPowerOf2_32(NewAlignment.getQuantity() && "Alignment not a power of 2")' failed.

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23001

            Bug ID: 23001
           Summary: RecordLayoutBuilder.cpp:1854: void (anonymous
                    namespace)::RecordLayoutBuilder::UpdateAlignment(clang
                    ::CharUnits, clang::CharUnits): Assertion
                    `llvm::isPowerOf2_32(NewAlignment.getQuantity() &&
                    "Alignment not a power of 2")' failed.
           Product: clang
           Version: 3.6
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: tjkenney at us.ibm.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 14089
  --> https://llvm.org/bugs/attachment.cgi?id=14089&action=edit
Output, including backtrace, from Debug+Asserts build of clang 3.6.0 when
failure occurs

3.6.0 Fails to compile source code which merely defines 4 structs. The same
code compiles and executes successfully with my previous version: SVN Rev
222776

Error: RecordLayoutBuilder.cpp:1854: void (anonymous
namespace)::RecordLayoutBuilder::UpdateAlignment(clang::CharUnits,
clang::CharUnits): Assertion `llvm::isPowerOf2_32(NewAlignment.getQuantity() &&
"Alignment not a power of 2")' failed.


Backtrace, min test case, & run script are attached.

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