builtin grep+sort prints a lot of empty lines

[wgrr]

Environment

sáb 02 nov 2024 09:48:51 -03
radare2 5.9.7 32870 @ linux-x86-64
birth: git.5.9.6-119-ge25d1beb23 2024-11-02__12:45:12
commit: e25d1beb23397520603ed78d98ed468698fe0abf
options: gpl -O? cs:5 cl:2 meson
Linux x86_64

Test

% r2 test/bins/elf/dwarf5_line
[0x00001040]> pd~$mov




































































            0x00001046      4989d1         mov r9, rdx
            0x0000104a      4889e2         mov rdx, rsp
            0x0000113a      4889e5         mov rbp, rsp
        │   0x00001083      488b053e2f..   mov rax, qword [reloc._ITM_deregisterTMCloneTable] ; [0x3fc8:8]=0
        ╎   0x000010b1      4889f0         mov rax, rsi
       │╎   0x000010c4      488b050d2f..   mov rax, qword [reloc._ITM_registerTMCloneTable] ; [0x3fd8:8]=0
       │╎   0x000010f6      4889e5         mov rbp, rsp
       │╎   0x0000110d      c605042f00..   mov byte [loc._edata], 1    ; obj.__TMC_END__
      ││╎   0x000010fb      488b3d0e2f..   mov rdi, qword [obj.__dso_handle] ; [0x4010:8]=0x4010 obj.__dso_handle

[trufae]

what would you expect to see with this invalid filter expression?

[wgrr]

what would you expect to see with this invalid filter expression?

Is it invalid? I thought it would be akin to | grep mov | sort. If it's invalid I'd like to see a warning/error message, if it's valid act like grep|sort i.e print exactly lines which matched the pattern, not create new ones