Segment Fault in 2.0.1 - 2.1.0pre3 and ruby 2.6.2p47

[joeheald85]

This is only occurring in a staging/ubuntu environment. Locally, on a MacOS/development environment, this is working fine.

/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/engine.rb:42: [BUG] Segmentation fault at 0x0000000000000000
ruby 2.6.2p47 (2019-03-13 revision 67232) [x86_64-linux-gnu]

-- Control frame information -----------------------------------------------
c:0028 p:---- s:0147 e:000146 CFUNC  :compile_data_context
c:0027 p:0298 s:0142 e:000141 METHOD /home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/engine.rb:42
c:0026 p:0139 s:0130 E:0009b8 METHOD /home/deploy/rails/sequoia/releases/20190624195338/lib/custom_css.rb:28
c:0025 p:0042 s:0123 E:001e68 EVAL   (irb):1 [FINISH]
c:0024 p:---- s:0119 e:000118 CFUNC  :eval
c:0023 p:0021 s:0111 e:000110 METHOD /usr/lib/ruby/2.6.0/irb/workspace.rb:85
c:0022 p:0056 s:0103 e:000101 METHOD /usr/lib/ruby/2.6.0/irb/context.rb:385
c:0021 p:0020 s:0094 e:000093 BLOCK  /usr/lib/ruby/2.6.0/irb.rb:493
c:0020 p:0025 s:0091 e:000090 METHOD /usr/lib/ruby/2.6.0/irb.rb:647
c:0019 p:0008 s:0085 e:000084 BLOCK  /usr/lib/ruby/2.6.0/irb.rb:490
c:0018 p:0100 s:0080 e:000079 BLOCK  /usr/lib/ruby/2.6.0/irb/ruby-lex.rb:246 [FINISH]
c:0017 p:---- s:0076 e:000075 CFUNC  :loop
c:0016 p:0006 s:0072 e:000071 BLOCK  /usr/lib/ruby/2.6.0/irb/ruby-lex.rb:232 [FINISH]
c:0015 p:---- s:0069 e:000068 CFUNC  :catch
c:0014 p:0012 s:0064 e:000063 METHOD /usr/lib/ruby/2.6.0/irb/ruby-lex.rb:231
c:0013 p:0034 s:0060 E:0026d8 METHOD /usr/lib/ruby/2.6.0/irb.rb:489
c:0012 p:0005 s:0055 e:000054 BLOCK  /usr/lib/ruby/2.6.0/irb.rb:428 [FINISH]
c:0011 p:---- s:0052 e:000051 CFUNC  :catch
c:0010 p:0064 s:0047 E:001ea8 METHOD /usr/lib/ruby/2.6.0/irb.rb:427
c:0009 p:0102 s:0042 e:000041 METHOD /usr/lib/ruby/2.6.0/irb.rb:383
c:0008 p:0205 s:0036 e:000035 METHOD /home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/railties-4.2.10/lib/rails/commands/console.rb:110
c:0007 p:0011 s:0032 e:000031 METHOD /home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/railties-4.2.10/lib/rails/commands/console.rb:9
c:0006 p:0087 s:0027 e:000026 METHOD /home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:68
c:0005 p:0028 s:0022 e:000021 METHOD /home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:39
c:0004 p:0111 s:0017 e:000016 TOP    /home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/railties-4.2.10/lib/rails/commands.rb:17 [FINISH]
c:0003 p:---- s:0012 e:000011 CFUNC  :require
c:0002 p:0108 s:0007 E:0011a8 EVAL   script/rails:39 [FINISH]
c:0001 p:0000 s:0003 E:000aa0 (none) [FINISH]

-- Ruby level backtrace information ----------------------------------------
script/rails:39:in `<main>'
script/rails:39:in `require'
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/railties-4.2.10/lib/rails/commands.rb:17:in `<top (required)>'
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/railties-4.2.10/lib/rails/commands/commands_tasks.rb:68:in `console'
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/railties-4.2.10/lib/rails/commands/console.rb:9:in `start'
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/railties-4.2.10/lib/rails/commands/console.rb:110:in `start'
/usr/lib/ruby/2.6.0/irb.rb:383:in `start'
/usr/lib/ruby/2.6.0/irb.rb:427:in `run'
/usr/lib/ruby/2.6.0/irb.rb:427:in `catch'
/usr/lib/ruby/2.6.0/irb.rb:428:in `block in run'
/usr/lib/ruby/2.6.0/irb.rb:489:in `eval_input'
/usr/lib/ruby/2.6.0/irb/ruby-lex.rb:231:in `each_top_level_statement'
/usr/lib/ruby/2.6.0/irb/ruby-lex.rb:231:in `catch'
/usr/lib/ruby/2.6.0/irb/ruby-lex.rb:232:in `block in each_top_level_statement'
/usr/lib/ruby/2.6.0/irb/ruby-lex.rb:232:in `loop'
/usr/lib/ruby/2.6.0/irb/ruby-lex.rb:246:in `block (2 levels) in each_top_level_statement'
/usr/lib/ruby/2.6.0/irb.rb:490:in `block in eval_input'
/usr/lib/ruby/2.6.0/irb.rb:647:in `signal_status'
/usr/lib/ruby/2.6.0/irb.rb:493:in `block (2 levels) in eval_input'
/usr/lib/ruby/2.6.0/irb/context.rb:385:in `evaluate'
/usr/lib/ruby/2.6.0/irb/workspace.rb:85:in `evaluate'
/usr/lib/ruby/2.6.0/irb/workspace.rb:85:in `eval'
(irb):1:in `irb_binding'
/home/deploy/rails/sequoia/releases/20190624195338/lib/custom_css.rb:28:in `render'
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/engine.rb:42:in `render'
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/engine.rb:42:in `compile_data_context'


-- C level backtrace information -------------------------------------------
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe431573db5) [0x7fe431573db5]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe431573fec) [0x7fe431573fec]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43141a0e7) [0x7fe43141a0e7]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe4314fd072) [0x7fe4314fd072]
/lib/x86_64-linux-gnu/libc.so.6(0x7fe430fef4b0) [0x7fe430fef4b0]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(sass_value_get_tag+0x0) [0x7fe41ed56630]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass4EvalclEPNS_13Function_CallE+0x2032) [0x7fe41ee07482]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass6ExpandclEPNS_11DeclarationE+0xf3) [0x7fe41ed98963]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(0x7fe41ee68b72) [0x7fe41ee68b72]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass6ExpandclEPNS_5BlockE+0x14b) [0x7fe41ed9841b]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass6ExpandclEPNS_7RulesetE+0x69e) [0x7fe41ed9acbe]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(0x7fe41ee68b72) [0x7fe41ee68b72]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass6ExpandclEPNS_5BlockE+0x14b) [0x7fe41ed9841b]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass6ExpandclEPNS_7RulesetE+0x69e) [0x7fe41ed9acbe]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(0x7fe41ee68b72) [0x7fe41ee68b72]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass6ExpandclEPNS_11Import_StubE+0x4e4) [0x7fe41ed97fe4]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(0x7fe41ee68b72) [0x7fe41ee68b72]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass6ExpandclEPNS_11Import_StubE+0x4e4) [0x7fe41ed97fe4]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(0x7fe41ee68b72) [0x7fe41ee68b72]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass6ExpandclEPNS_11Import_StubE+0x4e4) [0x7fe41ed97fe4]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(0x7fe41ee68b72) [0x7fe41ee68b72]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass6ExpandclEPNS_5BlockE+0x14b) [0x7fe41ed9841b]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass7Context7compileEv+0x2f4) [0x7fe41ee26ea4]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(_ZN4Sass12Data_Context5parseEv+0x277) [0x7fe41ee282f7]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(sass_compiler_parse+0x10e) [0x7fe41edb1e7e]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so(sass_compile_data_context+0x9f) [0x7fe41edb268f]
/usr/lib/x86_64-linux-gnu/libffi.so.6(ffi_call_unix64+0x4c) [0x7fe423c03e40]
/usr/lib/x86_64-linux-gnu/libffi.so.6(ffi_call+0x2eb) [0x7fe423c038ab]
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/ffi-1.11.1/lib/ffi_c.so(rbffi_CallFunction+0xe2) [0x7fe41f1bc662] Call.c:416
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/ffi-1.11.1/lib/ffi_c.so(rbffi_CallFunction) (null):0
/home/deploy/rails/sequoia/shared/bundle/ruby/2.6.0/gems/ffi-1.11.1/lib/ffi_c.so(custom_trampoline+0x30) [0x7fe41f1bfd70] MethodHandle.c:232
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155b3cb) [0x7fe43155b3cb]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe4315672e3) [0x7fe4315672e3]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155fa0a) [0x7fe43155fa0a]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(rb_vm_exec+0xb4) [0x7fe431565a64]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe431567eda) [0x7fe431567eda]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155b3cb) [0x7fe43155b3cb]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe4315672e3) [0x7fe4315672e3]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155fa0a) [0x7fe43155fa0a]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(rb_vm_exec+0xb4) [0x7fe431565a64]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe431568399) [0x7fe431568399]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(rb_rescue2+0xe6) [0x7fe431420996]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155b3cb) [0x7fe43155b3cb]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe4315672e3) [0x7fe4315672e3]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe431560f34) [0x7fe431560f34]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(rb_vm_exec+0xb4) [0x7fe431565a64]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43156c6e9) [0x7fe43156c6e9]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155c396) [0x7fe43155c396]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(rb_catch_obj+0x2c) [0x7fe43155c4ec]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155b3cb) [0x7fe43155b3cb]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe4315672e3) [0x7fe4315672e3]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe431560f34) [0x7fe431560f34]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(rb_vm_exec+0xb4) [0x7fe431565a64]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43156c6e9) [0x7fe43156c6e9]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155c396) [0x7fe43155c396]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(rb_catch_obj+0x2c) [0x7fe43155c4ec]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155b3cb) [0x7fe43155b3cb]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe4315672e3) [0x7fe4315672e3]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe431560f34) [0x7fe431560f34]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(rb_vm_exec+0xb4) [0x7fe431565a64]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43145f5ba) [0x7fe43145f5ba]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe431461180) [0x7fe431461180]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(rb_require_safe+0x9) [0x7fe431461279]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155b3cb) [0x7fe43155b3cb]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe4315672e3) [0x7fe4315672e3]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43155fa0a) [0x7fe43155fa0a]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(rb_vm_exec+0xb4) [0x7fe431565a64]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(0x7fe43141e2ea) [0x7fe43141e2ea]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(ruby_exec_node+0x1d) [0x7fe43142010d]
/usr/lib/x86_64-linux-gnu/libruby-2.6.so.2.6(ruby_run_node+0x2e) [0x7fe43142292e]
/usr/bin/ruby2.6(0x4008eb) [0x4008eb]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7fe430fda830]
/usr/bin/ruby2.6(_start+0x29) [0x400939]

[joeheald85]

Seems to be related to sass/sassc-rails#58 (comment)

Happens when it hits any asset pipeline helper, like image-url()

[joeheald85]

Also note, this is using rails 4.2

sassc (2.1.0.pre3)
  ffi (~> 1.9)
sassc-rails (2.1.2)
  railties (>= 4.0.0)
  sassc (>= 2.0)
  sprockets (> 3.0)
  sprockets-rails
  tilt

sprockets (3.7.2)
  concurrent-ruby (~> 1.0)
  rack (> 1, < 3)
sprockets-rails (3.2.1)
  actionpack (>= 4.0)
  activesupport (>= 4.0)
  sprockets (>= 3.0.0)

[ahorek]

@glebm this might be helpful

==13258== Invalid read of size 4
==13258==    at 0x17FF1630: sass_value_get_tag (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x180A2481: Sass::Eval::operator()(Sass::Function_Call*) (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x1804F57D: Sass::Eval::operator()(Sass::List*) (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x18033962: Sass::Expand::operator()(Sass::Declaration*) (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x18103B71: ??? (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x1803341A: Sass::Expand::operator()(Sass::Block*) (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x18035CBD: Sass::Expand::operator()(Sass::Ruleset*) (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x18103B71: ??? (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x1803341A: Sass::Expand::operator()(Sass::Block*) (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x180C1EA3: Sass::Context::compile() (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x180C32F6: Sass::Data_Context::parse() (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==    by 0x1804CE7D: sass_compiler_parse (in /usr/local/rvm/gems/ruby-2.6.3-railsexpress/gems/sassc-2.1.0.pre3-x86_64-linux/lib/sassc/libsass.so)
==13258==  Address 0x0 is not stack'd, malloc'd or (recently) free'd

full report https://gist.github.com/ahorek/88a5bfc31a42d3be1f36783ae18ac3f4

[lucaong]

Hitting the same issue, only happening in development mode in a Ubuntu docker container with ruby 2.6.4p104 (2019-08-28 revision 67798) [x86_64-linux] and Rails 6.0

[lucaong]

Here is the beginning of my stack trace:

/usr/local/bundle/gems/sassc-2.2.0/lib/sassc/engine.rb:42: [BUG] Segmentation fault at 0x0000000000000000
ruby 2.6.4p104 (2019-08-28 revision 67798) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0156 p:---- s:1061 e:001060 CFUNC  :compile_data_context
c:0155 p:0298 s:1056 E:0006c0 METHOD /usr/local/bundle/gems/sassc-2.2.0/lib/sassc/engine.rb:42
c:0154 p:0006 s:1044 E:0013b0 BLOCK  /usr/local/bundle/gems/sassc-rails-2.1.2/lib/sassc/rails/template.rb:40
c:0153 p:0056 s:1041 E:001428 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/utils.rb:171
c:0152 p:0164 s:1034 E:001388 METHOD /usr/local/bundle/gems/sassc-rails-2.1.2/lib/sassc/rails/template.rb:39
c:0151 p:0009 s:1025 E:001458 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/sass_processor.rb:30
c:0150 p:0053 s:1020 E:0014a0 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:75
c:0149 p:0016 s:1012 E:001530 BLOCK  /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:57 [FINISH]
c:0148 p:---- s:1007 e:001006 CFUNC  :reverse_each
c:0147 p:0039 s:1003 E:0014f0 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:56
c:0146 p:0393 s:0995 E:000650 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/loader.rb:134
c:0145 p:0073 s:0975 E:0015c8 BLOCK  /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/loader.rb:60
c:0144 p:0038 s:0969 E:000990 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/loader.rb:317
c:0143 p:0155 s:0959 E:001588 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/loader.rb:44
c:0142 p:0012 s:0950 E:001630 BLOCK  /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/cached_environment.rb:20 [FINISH]
c:0141 p:0008 s:0942 E:001668 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/cached_environment.rb:47
c:0140 p:0008 s:0935 E:001698 BLOCK  /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/bundle.rb:23
c:0139 p:0083 s:0931 E:0016e8 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/utils.rb:200
c:0138 p:0098 s:0920 E:0025b8 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/bundle.rb:24
c:0137 p:0053 s:0905 E:001730 METHOD /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:75
c:0136 p:0016 s:0897 E:0017c0 BLOCK  /usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:57 [FINISH]
c:0135 p:---- s:0892 e:000891 CFUNC  :reverse_each
...

[CHTJonas]

Am also being affected by this issue.

$ ruby -v
ruby 2.6.3p62 (2019-04-16 revision 67580) [x86_64-darwin18]

$ rails -v
Rails 6.0.0

$ bundle info sassc
  * sassc (2.2.1)
	Summary: Use libsass with Ruby!
	Homepage: https://github.com/sass/sassc-ruby
	Path: /Users/charlie/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/sassc-2.2.1

$ rails assets:clobber assets:precompile
I, [2019-10-12T22:51:58.478414 #77688]  INFO -- : Removed /Users/charlie/Development/roombooking/public/assets
Removed webpack output path directory /Users/charlie/Development/roombooking/public/packs
yarn install v1.19.1
[1/4] 🔍  Resolving packages...
success Already up-to-date.
✨  Done in 0.52s.
/Users/charlie/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/sassc-2.2.1/lib/sassc/engine.rb:42: [BUG] Segmentation fault at 0x0000000000000000
ruby 2.6.3p62 (2019-04-16 revision 67580) [x86_64-darwin18]

See attached below for my full stack traces and crash reports:

• stack-trace.txt
• crash-report.txt

[glebm]

See rails/sprockets#581 (comment) for a workaround