Invalid type for pointer element! when obfuscating hello world on debug build

[peperunas]

$ clang test.c 
[*] Extracting gadgets from: /nix/store/624na6gh6kmarknkd3l7swvj96hnr72n-librop-1.0.0/lib/librop.so
[*] Extracting gadgets from: /nix/store/624na6gh6kmarknkd3l7swvj96hnr72n-librop-1.0.0/lib/librop.so SHA1=571b46036b6383e007ab2f9d9a8e9123f77f006a
[LivenessAnalysis]	Register liveness analysis performed on basic block 0
    $eax = XOR32rr undef $eax(tied-def 0), undef $eax, implicit-def dead $eflags
[LivenessAnalysis] Available scratch registers:	22 25 27 
Exchanging back...
	✓ Replaced
    RETL killed $eax
[LivenessAnalysis] Available scratch registers:	25 27 
	✗ Unsupported instruction
clang-10: /build/lib/IR/Type.cpp:639: static llvm::PointerType* llvm::PointerType::get(llvm::Type*, unsigned int): Assertion `isValidElementType(EltTy) && "Invalid type for pointer element!"' failed.
Stack dump:
0.	Program arguments: /nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10 -cc1 -triple i686-unknown-linux-gnu -emit-obj -disable-free -main-file-name test.c -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -target-cpu pentium4 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /nix/store/yvr0kpzck6qmdkpskadcf98pzmqmw3b8-ropfuscator-wrapper-0.1.0/resource-root -idirafter /nix/store/nd5vf7a5xahfia7vashv4aq7qp37ki24-glibc-2.33-56-dev/include -isystem /nix/store/dh7jn7ra2jmvaran3bbpin3qxcdpv9nj-compiler-rt-libc-10.0.1-dev/include -isystem /nix/store/dh7jn7ra2jmvaran3bbpin3qxcdpv9nj-compiler-rt-libc-10.0.1-dev/include -D _FORTIFY_SOURCE=2 -internal-isystem /usr/local/include -internal-isystem /nix/store/yvr0kpzck6qmdkpskadcf98pzmqmw3b8-ropfuscator-wrapper-0.1.0/resource-root/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wformat -Wformat-security -Werror=format-security -fdebug-compilation-dir /home/giulio/dev/ropfuscator/ropfuscator -ferror-limit 19 -fmessage-length 0 -fwrapv -stack-protector 2 -stack-protector-buffer-size 4 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm --ropfuscator-library=/nix/store/624na6gh6kmarknkd3l7swvj96hnr72n-librop-1.0.0/lib/librop.so -mllvm -debug-only=xchg_chains,ropchains,processed_instr,liveness_analysis -faddrsig -o /tmp/nix-shell.D6RxYw/test-c544d9.o -x c test.c 
1.	<eof> parser at end of file
2.	Code generation
3.	Running pass 'Function Pass Manager' on module 'test.c'.
4.	Running pass 'x86-ropfuscator' on function '@main'
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN4llvm3sys15PrintStackTraceERNS_11raw_ostreamE+0x35)[0x962e9f5]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10[0x962eadd]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN4llvm3sys17RunSignalHandlersEv+0x39)[0x962ce19]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10[0x962cfa5]
linux-gate.so.1(__kernel_sigreturn+0x0)[0xf7f625e0]
linux-gate.so.1(__kernel_vsyscall+0x9)[0xf7f625c9]
/nix/store/j6gabyswcdzwhfyqjnqx5nsp35wywxld-glibc-i686-unknown-linux-gnu-2.33-56/lib/libc.so.6(gsignal+0xb5)[0xf7a571a5]
/nix/store/j6gabyswcdzwhfyqjnqx5nsp35wywxld-glibc-i686-unknown-linux-gnu-2.33-56/lib/libc.so.6(abort+0x110)[0xf7a402fd]
/nix/store/j6gabyswcdzwhfyqjnqx5nsp35wywxld-glibc-i686-unknown-linux-gnu-2.33-56/lib/libc.so.6(+0x1a1e1)[0xf7a401e1]
/nix/store/j6gabyswcdzwhfyqjnqx5nsp35wywxld-glibc-i686-unknown-linux-gnu-2.33-56/lib/libc.so.6(+0x293c9)[0xf7a4f3c9]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN4llvm11PointerType3getEPNS_4TypeEj+0x4e1)[0x9011f81]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN4llvm14GlobalVariableC1ERNS_6ModuleEPNS_4TypeEbNS_11GlobalValue12LinkageTypesEPNS_8ConstantERKNS_5TwineEPS0_NS5_15ThreadLocalModeEjb+0x38)[0x8f87328]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10[0x8754fd4]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10[0x87578a2]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10[0x875990b]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10[0x8529c79]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10[0x8b72e74]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE+0x337)[0x8fccfc7]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE+0x3e)[0x8fcd61e]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE+0x3ce)[0x8fcda2e]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN4llvm6legacy11PassManager3runERNS_6ModuleE+0x1f)[0x8fcdd3f]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10[0x9861f88]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN5clang17EmitBackendOutputERNS_17DiagnosticsEngineERKNS_19HeaderSearchOptionsERKNS_14CodeGenOptionsERKNS_13TargetOptionsERKNS_11LangOptionsERKN4llvm10DataLayoutEPNSE_6ModuleENS_13BackendActionESt10unique_ptrINSE_17raw_pwrite_streamESt14default_deleteISM_EE+0x35b)[0x986388b]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10[0xa49a11e]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN5clang8ParseASTERNS_4SemaEbb+0x4a5)[0xaf27ee5]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN5clang17ASTFrontendAction13ExecuteActionEv+0x6a)[0x9e2a7ba]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN5clang13CodeGenAction13ExecuteActionEv+0xb1)[0xa497a71]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN5clang14FrontendAction7ExecuteEv+0xc9)[0x9e2fb49]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN5clang16CompilerInstance13ExecuteActionERNS_14FrontendActionE+0x1f6)[0x9de9ab6]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_ZN5clang25ExecuteCompilerInvocationEPNS_16CompilerInstanceE+0x860)[0x9ee8500]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_Z8cc1_mainN4llvm8ArrayRefIPKcEES2_Pv+0x4ff)[0x84dc49f]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10[0x84d980e]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(main+0x628)[0x846ec28]
/nix/store/j6gabyswcdzwhfyqjnqx5nsp35wywxld-glibc-i686-unknown-linux-gnu-2.33-56/lib/libc.so.6(__libc_start_main+0xe5)[0xf7a41905]
/nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin/clang-10(_start+0x32)[0x84d8a12]
clang-10: error: unable to execute command: Aborted (core dumped)
clang-10: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 10.0.1 
Target: i686-unknown-linux-gnu
Thread model: posix
InstalledDir: /nix/store/ly8qpm2rf8ylm25wwpn85dhgi2pqa5r1-ropfuscator-i686-unknown-linux-gnu-0.1.0/bin
clang-10: note: diagnostic msg: PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
clang-10: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-10: note: diagnostic msg: /tmp/nix-shell.D6RxYw/test-24c4e6.c
clang-10: note: diagnostic msg: /tmp/nix-shell.D6RxYw/test-24c4e6.sh
clang-10: note: diagnostic msg: 

********************

Source file:

#include <stdio.h>

int main () {}

[peperunas]

@fnaka, I have tried to compile the hello world with ROPfuscator on LLVM 7 (see branch llvm7), same issue.