llvm-project/llvm/test/MC/AsmParser/empty-comment.s

	#RUN: llvm-mc -preserve-comments -n -triple i386-linux-gnu < %s > %t
	.text
foo:
	nop #
[MC] Fix compiler crash in AsmParser::Lex When an empty comment is present in an assembly file, the compiler will crash because it checks the first character for '\n' or '\r'. The fix consists of also checking if the string is empty before accessing the front method of the StringRef. A test is included for the x86 target, but this issue is reproducible with other targets as well. Patch by Alexandru Guduleasa! Reviewers: niravd, grosbach, llvm-commits Reviewed By: niravd Differential Revision: https://reviews.llvm.org/D33993 llvm-svn: 305077 2017-06-09 22:04:03 +08:00			`#RUN: llvm-mc -preserve-comments -n -triple i386-linux-gnu < %s > %t`
			`.text`
			`foo:`
			`nop #`