ti.random() Fails

[squarefk]

import taichi as ti

ti.init(arch=ti.gpu, default_fp=ti.f64)

x = ti.field(dtype=ti.f64)
ti.root.dense(ti.i, 10).place(x)

@ti.kernel
def failure():
    x[0] = ti.random(dtype=ti.f64)
    print(x[0])

if __name__ == "__main__":
    failure()

[Taichi] mode=development
[Taichi] preparing sandbox at /tmp/taichi-rioea07h
[Taichi] <dev mode>, llvm 10.0.0, commit 1ea0ec85, linux, python 3.6.9
[Taichi] Starting on arch=cuda
[Taichi] materializing...
python3: /home/squarefk/repos/llvm-10.0.0.src/lib/IR/Instructions.cpp:1358: void llvm::StoreInst::AssertOK(): Assertion `getOperand(0)->getType() == cast<PointerType>(getOperand(1)->getType())->getElementType() && "Ptr must be a pointer to Val type!"' failed.
[E 11/03/20 15:12:26.095] Received signal 6 (Aborted)


***********************************
* Taichi Compiler Stack Traceback *
***********************************
/tmp/taichi-rioea07h/taichi_core.so: taichi::Logger::error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool)
/tmp/taichi-rioea07h/taichi_core.so: taichi::signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3efd0) [0x7f3910910fd0]
/lib/x86_64-linux-gnu/libc.so.6: gsignal
/lib/x86_64-linux-gnu/libc.so.6: abort
/lib/x86_64-linux-gnu/libc.so.6(+0x3042a) [0x7f391090242a]
/lib/x86_64-linux-gnu/libc.so.6(+0x304a2) [0x7f39109024a2]
/tmp/taichi-rioea07h/taichi_core.so(+0x804dd0) [0x7f390aaefdd0]
/tmp/taichi-rioea07h/taichi_core.so(+0x804fb3) [0x7f390aaeffb3]
/tmp/taichi-rioea07h/taichi_core.so(+0x3e189c) [0x7f390a6cc89c]
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::CodeGenLLVM::visit(taichi::lang::GlobalStoreStmt*)
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::GlobalStoreStmt::accept(taichi::lang::IRVisitor*)
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::CodeGenLLVM::visit(taichi::lang::Block*)
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::CodeGenLLVMCUDA::visit(taichi::lang::OffloadedStmt*)
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::OffloadedStmt::accept(taichi::lang::IRVisitor*)
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::CodeGenLLVM::visit(taichi::lang::Block*)
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::CodeGenLLVM::gen()
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::CodeGenCUDA::codegen()
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::KernelCodeGen::compile()
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::Program::compile_to_backend_executable(taichi::lang::Kernel&, taichi::lang::OffloadedStmt*)
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::Program::compile(taichi::lang::Kernel&)
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::Kernel::compile()
/tmp/taichi-rioea07h/taichi_core.so: taichi::lang::Kernel::operator()(taichi::lang::Kernel::LaunchContextBuilder&)
/tmp/taichi-rioea07h/taichi_core.so(+0x4d6e36) [0x7f390a7c1e36]
/tmp/taichi-rioea07h/taichi_core.so(+0x414211) [0x7f390a6ff211]
python3(_PyCFunction_FastCallDict+0x35c) [0x566bbc]
python3() [0x594a71]
python3() [0x54a971]
python3(_PyObject_FastCallKeywords+0x19c) [0x5a9dac]
python3() [0x50a433]
python3(_PyEval_EvalFrameDefault+0x444) [0x50beb4]
python3() [0x507be4]
python3() [0x588c8b]
python3(PyObject_Call+0x3e) [0x59fd0e]
python3(_PyEval_EvalFrameDefault+0x17e6) [0x50d256]
python3() [0x507be4]
python3(_PyFunction_FastCallDict+0x2e2) [0x508ec2]
python3() [0x594a01]
python3() [0x54a971]
python3(PyObject_Call+0x3e) [0x59fd0e]
python3(_PyEval_EvalFrameDefault+0x17e6) [0x50d256]
python3() [0x507be4]
python3() [0x509900]
python3() [0x50a2fd]
python3(_PyEval_EvalFrameDefault+0x444) [0x50beb4]
python3() [0x507be4]
python3(PyEval_EvalCode+0x23) [0x50ad03]
python3() [0x634e72]
python3(PyRun_FileExFlags+0x97) [0x634f27]
python3(PyRun_SimpleFileExFlags+0x17f) [0x6386df]
python3(Py_Main+0x591) [0x639281]
python3(main+0xe0) [0x4b0dc0]
/lib/x86_64-linux-gnu/libc.so.6: __libc_start_main
python3(_start+0x2a) [0x5b259a]

Internal error occurred. Check out this page for possible solutions:
https://taichi.readthedocs.io/en/stable/install.html#troubleshooting

[squarefk]

A temporary workaround is to use

x[0] = ti.cast(ti.random(dtype=ti.f32), ti.f64)

to replace

x[0] = ti.random(dtype=ti.f64)

[yuanming-hu]

A lot of thanks to @victoriacity for pointing out the cause of the issue. I believe this has been fixed in #2042.