nyx also returns a crash log when reporting a crash, both files are saved in the afl++ fuzzing run, whereas with the AFL_CRASHING_SEEDS_AS_NEW_CRASH setting, only the crash file is saved in the dry run phase if crashes are included in the supplied seeds.
This commit adds crash log saving to keep the behavior consistent
commit ecb5854be0 ("add zlib compression for fast resume") added new
logic selected at compile-time when zlib is present. Unfortunately, it
also broke the existing logic by removing the last line of a multi-line
if statement, resulting in a syntax error when zlib isn't present.
Restore the line as it was.
In GNUmakefile.llvm, several variables are unconditionally populated
by expanding $(LLVMVER) and $(LLVM_CONFIG) inside shell commands.
However, when LLVM is not present, both those variables are empty,
meaning that the shell commands end up malformed and emit harmless, but
noisy, errors like this one:
/bin/sh: --: invalid option
Usage: /bin/sh [GNU long option] [option] ...
/bin/sh [GNU long option] [option] script-file ...
GNU long options:
--debug
--debugger
--dump-po-strings
--dump-strings
--help
--init-file
--login
--noediting
--noprofile
--norc
--posix
--pretty-print
--rcfile
--rpm-requires
--restricted
--verbose
--version
Shell options:
-ilrsD or -c command or -O shopt_option (invocation only)
-abefhkmnptuvxBCHP or -o option
/bin/sh: line 1: test: -gt: unary operator expected
/bin/sh: line 1: test: -lt: unary operator expected
/bin/sh: line 1: test: -ge: unary operator expected
/bin/sh: line 1: test: -ge: unary operator expected
Fix the problem by only populating the "downstream" variables if the
upstream ones have values.
