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lobstr

Visualize R Data Structures with Trees

v1.2.0 · Feb 18, 2026 · MIT + file LICENSE
CRAN GitHub Mirror

Description

A set of tools for inspecting and understanding R data structures inspired by str(). Includes ast() for visualizing abstract syntax trees, ref() for showing shared references, cst() for showing call stack trees, and obj_size() for computing object sizes.

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CRAN Check Status

11 NOTE
3 OK
Show all 14 flavors
Flavor Status
r-devel-linux-x86_64-debian-clang NOTE
r-devel-linux-x86_64-debian-gcc NOTE
r-devel-linux-x86_64-fedora-clang NOTE
r-devel-linux-x86_64-fedora-gcc NOTE
r-devel-macos-arm64 NOTE
r-devel-windows-x86_64 NOTE
r-oldrel-macos-arm64 OK
r-oldrel-macos-x86_64 OK
r-oldrel-windows-x86_64 OK
r-patched-linux-x86_64 NOTE
r-release-linux-x86_64 NOTE
r-release-macos-arm64 NOTE
r-release-macos-x86_64 NOTE
r-release-windows-x86_64 NOTE
Check details (14 non-OK)
NOTE r-devel-linux-x86_64-debian-clang

compiled code

File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SET_PRCODE’, ‘SET_PRENV’,
    ‘SET_PRVALUE’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
NOTE r-devel-linux-x86_64-debian-gcc

compiled code

File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SET_PRCODE’, ‘SET_PRENV’,
    ‘SET_PRVALUE’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
NOTE r-devel-linux-x86_64-fedora-clang

compiled code

File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SET_PRCODE’, ‘SET_PRENV’,
    ‘SET_PRVALUE’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
NOTE r-devel-linux-x86_64-fedora-gcc

compiled code

File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SET_PRCODE’, ‘SET_PRENV’,
    ‘SET_PRVALUE’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
NOTE r-devel-macos-arm64

compiled code

File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SET_PRCODE’, ‘SET_PRENV’,
    ‘SET_PRVALUE’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.
NOTE r-devel-windows-x86_64

compiled code

File 'lobstr/libs/x64/lobstr.dll':
  Found non-API calls to R: 'PRENV', 'PRVALUE', 'R_PromiseExpr',
    'Rf_allocSExp', 'Rf_findVarInFrame3', 'SET_PRCODE', 'SET_PRENV',
    'SET_PRVALUE'

Compiled code should not call non-API entry points in R.

See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.
OK r-oldrel-macos-arm64

*


            

            

              

                OK
                r-oldrel-macos-x86_64
              

              
*

              

            

            

              

                OK
                r-oldrel-windows-x86_64
              

              
*

              

            

            

              

                NOTE
                r-patched-linux-x86_64
              

              
compiled code

              
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SETLENGTH’,
    ‘SET_GROWABLE_BIT’, ‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’,
    ‘SET_TRUELENGTH’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

            

            

              

                NOTE
                r-release-linux-x86_64
              

              
compiled code

              
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SETLENGTH’,
    ‘SET_GROWABLE_BIT’, ‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’,
    ‘SET_TRUELENGTH’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

            

            

              

                NOTE
                r-release-macos-arm64
              

              
compiled code

              
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SETLENGTH’,
    ‘SET_GROWABLE_BIT’, ‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’,
    ‘SET_TRUELENGTH’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

            

            

              

                NOTE
                r-release-macos-x86_64
              

              
compiled code

              
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SETLENGTH’,
    ‘SET_GROWABLE_BIT’, ‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’,
    ‘SET_TRUELENGTH’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

            

            

              

                NOTE
                r-release-windows-x86_64
              

              
compiled code

              
File 'lobstr/libs/x64/lobstr.dll':
  Found non-API calls to R: 'PRENV', 'PRVALUE', 'R_PromiseExpr',
    'Rf_allocSExp', 'Rf_findVarInFrame3', 'SETLENGTH',
    'SET_GROWABLE_BIT', 'SET_PRCODE', 'SET_PRENV', 'SET_PRVALUE',
    'SET_TRUELENGTH'

Compiled code should not call non-API entry points in R.

See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.

            

          

        

      



      

      
      

        
Check History

        

          

            
              NOTE
              
                3 OK ·                 11 NOTE ·                 0 WARNING ·                 0 ERROR ·                 0 FAILURE              
              Mar 9, 2026
            
            

              

                

                  NOTE
                  r-devel-linux-x86_64-debian-clang
                

                
compiled code

                
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SET_PRCODE’, ‘SET_PRENV’,
    ‘SET_PRVALUE’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

              

              

                

                  NOTE
                  r-devel-linux-x86_64-debian-gcc
                

                
compiled code

                
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SET_PRCODE’, ‘SET_PRENV’,
    ‘SET_PRVALUE’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

              

              

                

                  NOTE
                  r-devel-linux-x86_64-fedora-clang
                

                
compiled code

                
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SET_PRCODE’, ‘SET_PRENV’,
    ‘SET_PRVALUE’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

              

              

                

                  NOTE
                  r-devel-linux-x86_64-fedora-gcc
                

                
compiled code

                
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SET_PRCODE’, ‘SET_PRENV’,
    ‘SET_PRVALUE’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

              

              

                

                  NOTE
                  r-devel-macos-arm64
                

                
compiled code

                
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SET_PRCODE’, ‘SET_PRENV’,
    ‘SET_PRVALUE’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

              

              

                

                  NOTE
                  r-devel-windows-x86_64
                

                
compiled code

                
File 'lobstr/libs/x64/lobstr.dll':
  Found non-API calls to R: 'PRENV', 'PRVALUE', 'R_PromiseExpr',
    'Rf_allocSExp', 'Rf_findVarInFrame3', 'SET_PRCODE', 'SET_PRENV',
    'SET_PRVALUE'

Compiled code should not call non-API entry points in R.

See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.

              

              

                

                  NOTE
                  r-patched-linux-x86_64
                

                
compiled code

                
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SETLENGTH’,
    ‘SET_GROWABLE_BIT’, ‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’,
    ‘SET_TRUELENGTH’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

              

              

                

                  NOTE
                  r-release-linux-x86_64
                

                
compiled code

                
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SETLENGTH’,
    ‘SET_GROWABLE_BIT’, ‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’,
    ‘SET_TRUELENGTH’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

              

              

                

                  NOTE
                  r-release-macos-arm64
                

                
compiled code

                
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SETLENGTH’,
    ‘SET_GROWABLE_BIT’, ‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’,
    ‘SET_TRUELENGTH’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

              

              

                

                  NOTE
                  r-release-macos-x86_64
                

                
compiled code

                
File ‘lobstr/libs/lobstr.so’:
  Found non-API calls to R: ‘PRENV’, ‘PRVALUE’, ‘R_PromiseExpr’,
    ‘Rf_allocSExp’, ‘Rf_findVarInFrame3’, ‘SETLENGTH’,
    ‘SET_GROWABLE_BIT’, ‘SET_PRCODE’, ‘SET_PRENV’, ‘SET_PRVALUE’,
    ‘SET_TRUELENGTH’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

              

              

                

                  NOTE
                  r-release-windows-x86_64
                

                
compiled code

                
File 'lobstr/libs/x64/lobstr.dll':
  Found non-API calls to R: 'PRENV', 'PRVALUE', 'R_PromiseExpr',
    'Rf_allocSExp', 'Rf_findVarInFrame3', 'SETLENGTH',
    'SET_GROWABLE_BIT', 'SET_PRCODE', 'SET_PRENV', 'SET_PRVALUE',
    'SET_TRUELENGTH'

Compiled code should not call non-API entry points in R.

See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.

              

            

          

        

      


      
      

        
Reverse Dependencies (24)

        

          
imports

          

            REDCapTidieR
            SpaDES.core
            brclimr
            butcher
            carrier
            httping
            interfacer
            potions
            reproducible
            sourcoise
            traktok
          

        

        

          
suggests

          

            R6
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            sport
            tmap
          

        

      


      
      

        
Dependency Network

        

          
            

            
            
            Dependencies
            
            Reverse dependencies

            
            
            
            

            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            

            
            
              
              crayon
            
            
              
              prettyunits
            
            
              
              rlang
            

            
            
              
              REDCapTidieR
            
            
              
              SpaDES.core
            
            
              
              brclimr
            
            
              
              butcher
            
            
              
              carrier
            
            
              
              httping
            
            
              
              interfacer
            
            
              
              potions
            
            
              
              reproducible
            
            
              
              sourcoise
            
            
              
              traktok
            
            
              
              R6
            
            
              
              cpp11
            
            
              
              dataquieR
            
            
              
              dplyr
            
            +9 more reverse deps

            
            
            lobstr
          
        

      


      
      

        
Version History

        

          

            new
            1.2.0
            Mar 9, 2026