Bug #17665: Make failed on x86_64-cygwin (miniruby.exe segmentation fault)

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 3.1.0dev (2021-02-27T16:42:49Z master 5c9079759d) [x86_64-cygwin]
• Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN

[fd0 (Daisuke Fujimura)]

Make failed on x86_64-cygwin (miniruby.exe segmentation fault)

$ git clone https://github.com/ruby/ruby.git
$ cd ruby
$ autoreconf -fiv && ./configure && make V=1
(snip)
./miniruby.exe -I./lib -I. -I.ext/common  ./tool/generic_erb.rb -c -o encdb.h ./template/encdb.h.tmpl ./enc enc
make: *** [uncommon.mk:1098: encdb.h] Segmentation fault (core dumped)
$

This problem seems to have occurred since 1e13548953659bd12c28625d45998322449f3be8.

• https://github.com/ruby/ruby/commit/1e13548953659bd12c28625d45998322449f3be8

Segmentation faults can be avoided by not using mmap.

[xtkoba (Tee KOBAYASHI)]

fd0 (Daisuke Fujimura) Would you please try the patch in #17652#note-5 ?

[xtkoba (Tee KOBAYASHI)]

Not using mmap(2) may be a workaround, but there is a drawback of GC compaction being not usable.

[fd0 (Daisuke Fujimura)]

Would you please try the patch in #17652#note-5 ?

Applying the patch, I have confirmed that segmentation fault does not occur.

$ ./miniruby.exe -v
ruby 3.1.0dev (2021-02-28T11:24:42Z master 80e2c45f55) [x86_64-cygwin]

[peterzhu2118 (Peter Zhu)]

Thanks for reporting the issue in cygwin. I've proposed a patch that should solve the issue.

[peterzhu2118 (Peter Zhu)]

• Status changed from Open to Closed