malloc/memory error about archive

[jimhester]

I can reproduce this, I know what the issue is, I misinterpreted the API for archive_read_data_block(); am working on a fix.

[coolbutuseless]

After adding an explicit close(con) (as suggested in order to fix #18) it's clearer now that the error probably occurs in the process of closing the connection.

I.e. the first 6 lines of code in the following example run fine. The seventh line which closes the connection throws the memory error.

con <- archive::archive_write(archive = "archive.tar", file="first")
saveRDS(mtcars, con)
close(con)
con <- archive::archive_read(archive = "archive.tar", file='first')
zz <- readRDS(con)
isOpen(con)  # FALSE. con automatically opened/closed by 'readRDS'
close(con)

R(68759,0x7fffac92c380) malloc: *** error for object 0x109a85200: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
Abort trap: 6

[jimhester]

Thank you for the minimal example, it made fixing this easier, should now be working as expected.