The following bit of (malformed) assembly causes GNU as to crash. .globl foo .type foo, @function foo: sete $%al Here is the error message: $ as test.s test.s: Assembler messages: test.s:4: Internal error, aborting at ../../gas/config/tc-i386.c line 2123 in optimize_imm Please report this bug. $ as --version GNU assembler 2.17 Debian GNU/Linux Copyright 2005 Free Software Foundation, Inc. This program is free software; you may redistribute it under the terms of the GNU General Public License. This program has absolutely no warranty. This assembler was configured for a target of `x86_64-linux-gnu'. (BTW, I originally submitted this to the gcc bugzilla and was told to come here, I found the wrong bugzilla instance from the gas manual so maybe someone should look into that.)
*** This bug has been marked as a duplicate of 2533 ***