Error at the prompt may lead to the JIT not finding std::basic_ostream symbol

[pcanal]

Check duplicate issues.

• Checked for duplicates

Description

root [0] size_t al(size_t p, size_t alignment) { return ((p + (alignment - 1)) & ~(alignment - 1)); } 
root [1] void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n' };
ROOT_prompt_1:1:196: error: expected ';' after expression
void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n' };
                                                                                                                                                                                                   ^
                                                                                                                                                                                                   ;
root [2] void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n'; };
root [3] printextra(24, 56, 64)
cling JIT session error: Failed to materialize symbols: { (main, { __ZNSt3__1lsB7v160006INS_11char_traitsIcEEEERNS_13basic_ostreamIcT_EES6_c }) }
root [4] .q

Reproducer

Copy/paste this on the root prompt:

size_t al(size_t p, size_t alignment) { return ((p + (alignment - 1)) & ~(alignment - 1)); } 
void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n' };
void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n'; };
printextra(24, 56, 64)

ROOT version

master

Installation method

local build

Operating system

MacOS

Additional context

No response

[ferdymercury]

@pcanal @hahnjo Could you confirm whether this is still an issue? Or is it just an issue on MacOS?

I tried on Ubuntu and I cannot reproduce the error.

I get:

   ------------------------------------------------------------------
  | Welcome to ROOT 6.24/06                        https://root.cern |
  | (c) 1995-2021, The ROOT Team; conception: R. Brun, F. Rademakers |
  | Built for linuxx8664gcc on May 15 2024, 18:21:00                 |
  | From tag , 1 September 2021                                      |
  | With                                                             |
  | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q'       |
   ------------------------------------------------------------------

root [0] size_t al(size_t p, size_t alignment) { return ((p + (alignment - 1)) & ~(alignment - 1)); }
root [1] void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n' };
ROOT_prompt_1:1:196: error: expected ';' after expression
void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n' };
                                                                                                                                                                                                   ^
                                                                                                                                                                                                   ;
root [2] void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n'; };
root [3] printextra(24, 56, 64)
alloc: 56 data: 128 waste: 48
root [4] 

same with 6.32.04, 6.36.02 and master debug build.

[pcanal]

The problem is still there (which a different error message though) on MacOS:

$ root.exe -b -l
root [0] size_t al(size_t p, size_t alignment) { return ((p + (alignment - 1)) & ~(alignment - 1)); } 
root [1] void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n' };
ROOT_prompt_1:1:196: error: expected ';' after expression
void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n' };
                                                                                                                                                                                                   ^
                                                                                                                                                                                                   ;
root [2] void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n'; };
root [3] printextra(24, 56, 64)
IncrementalExecutor::executeFunction: symbol '_ZNSt3__1lsB8ne190102INS_11char_traitsIcEEEERNS_13basic_ostreamIcT_EES6_c' unresolved while linking [cling interface function]!
You are probably missing the definition of std::__1::basic_ostream<char, std::__1::char_traits<char>>& std::__1::operator<<[abi:ne190102]<std::__1::char_traits<char>>(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, char)
Maybe you need to load the corresponding shared library?
IncrementalExecutor::executeFunction: symbol '_ZNKSt3__18ios_base5flagsB8ne190102Ev' unresolved while linking [cling interface function]!
You are probably missing the definition of std::__1::ios_base::flags[abi:ne190102]() const
Maybe you need to load the corresponding shared library?
IncrementalExecutor::executeFunction: symbol '_ZNSt3__116__pad_and_outputB8ne190102IcNS_11char_traitsIcEEEENS_19ostreambuf_iteratorIT_T0_EES6_PKS4_S8_S8_RNS_8ios_baseES4_' unresolved while linking [cling interface function]!
You are probably missing the definition of std::__1::ostreambuf_iterator<char, std::__1::char_traits<char>> std::__1::__pad_and_output[abi:ne190102]<char, std::__1::char_traits<char>>(std::__1::ostreambuf_iterator<char, std::__1::char_traits<char>>, char const*, char const*, char const*, std::__1::ios_base&, char)
Maybe you need to load the corresponding shared library?
root [4] 

[ferdymercury]

Thanks for checking. @bellenot could you try on Windows? To see if it only happens on MacOS.

[bellenot]

Here it is, on Windows:

C:\root-dev\build\x64\relwithdebinfo>root -l
root [0] size_t al(size_t p, size_t alignment) { return ((p + (alignment - 1)) & ~(alignment - 1)); }
root [1] void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n'; };
root [2] printextra(24, 56, 64)
alloc: 56 data: 128 waste: 48
root [3]

[ferdymercury]

Thanks! But you need first to purposely introduce the mistake (missing semicolon).

see:

size_t al(size_t p, size_t alignment) { return ((p + (alignment - 1)) & ~(alignment - 1)); } 
void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n' };
void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n'; };
printextra(24, 56, 64)

[bellenot]

Oh, OK, sorry I thought it was a typo... So here it is:

C:\root-dev\build\x64\relwithdebinfo>root -l
root [0] size_t al(size_t p, size_t alignment) { return ((p + (alignment - 1)) & ~(alignment - 1)); }
root [1] void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n' };
ROOT_prompt_1:1:196: error: expected ';' after expression
void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n' };
                                                                                                                                                                                                   ^
                                                                                                                                                                                                   ;
root [2] void printextra(size_t use, size_t p, size_t alignment) { auto realstart = al(p+use, alignment); std::cout << "alloc: " << p << " data: " << realstart << " waste: " << realstart - p - use << '\n'; };
root [3] printextra(24, 56, 64)
alloc: 56 data: 128 waste: 48
root [4]

[ferdymercury]

Thanks for checking! So it is confirmed that it's a MacOS-specific issue since it works on Windows and Ubuntu. Unless it is the CXX standard of g++ version and not the OS.