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MichaelChirico / r-bugs

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[BUGZILLA #14766] readLines(f) crashes R on Linux when f has exactly 1000 bytes with no EOL marker #4355

Closed MichaelChirico closed 4 years ago

MichaelChirico commented 4 years ago

Here's an R session showing how to trigger this (tried on Debian sid and RHEL4):

cat(paste(rep("a", 1000), collapse = ""), file = "a.txt")
readLines("a.txt")

glibc detected /usr/lib/R/bin/exec/R: double free or corruption (!prev): 0x00000000017dc1a0 *** ======= Backtrace: ========= /lib/x86_64-linux-gnu/libc.so.6(+0x72606)[0x7f1a2a2e5606] /lib/x86_64-linux-gnu/libc.so.6(cfree+0x6c)[0x7f1a2a2ea33c] /usr/lib/R/lib/libR.so(+0x8e730)[0x7f1a2aaae730] /usr/lib/R/lib/libR.so(+0xe8ed1)[0x7f1a2ab08ed1] /usr/lib/R/lib/libR.so(Rf_eval+0x17a)[0x7f1a2ab1443a] /usr/lib/R/lib/libR.so(Rf_applyClosure+0x32f)[0x7f1a2ab17abf] /usr/lib/R/lib/libR.so(Rf_eval+0x400)[0x7f1a2ab146c0] /usr/lib/R/lib/libR.so(Rf_ReplIteration+0x1e3)[0x7f1a2ab50923] /usr/lib/R/lib/libR.so(+0x130ba0)[0x7f1a2ab50ba0] /usr/lib/R/lib/libR.so(run_Rmainloop+0x50)[0x7f1a2ab50c10] /usr/lib/R/bin/exec/R(main+0x1b)[0x40086b] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd)[0x7f1a2a291ead] /usr/lib/R/bin/exec/R[0x40089d] ======= Memory map: ======== (lines deleted)

version
           _

platform x86_64-pc-linux-gnu
arch x86_64
os linux-gnu
system x86_64, linux-gnu
status
major 2
minor 14.1
year 2011
month 12
day 22
svn rev 57956
language R
version.string R version 2.14.1 (2011-12-22)

Thanks,

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MichaelChirico commented 4 years ago

Fixed in R-devel and soon R-patched.

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MichaelChirico commented 4 years ago

This also happens in R-devel in Windows (using Rterm). I'll track it down...

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