Bug 920066 – dev-util/ctags fails ruby parser on sparc

• Status: CONFIRMED
• Product: Gentoo Linux

[Description matoro 2023-12-15 23:59:04 UTC]

build.log and emerge --info in attachment.

Exit code 138 = killed by SIGBUS.  Manually confirmed like so:

$ ./ctags --verbose --options=NONE --fields=-T --optlib-dir=+.
/Units/parser-ruby.r/simple.rb.d/optlib -o - --options=./Units/parser-ruby.r/simple.rb.d/args.ctags ./Units/parser-ruby.r/simple.rb.d/input.rb

...


Reading command line arguments
Get file language for ./Units/parser-ruby.r/simple.rb.d/input.rb
        pattern: input.rb
                #candidates: 1
                        0: Ruby (extension: "rb")
                #candidates after sorting and filtering: 1
                        0: Ruby (extension: "rb")
OPENING ./Units/parser-ruby.r/simple.rb.d/input.rb as Ruby language file [new]
Initialize parser: Ruby
Initialize parser: RSpec
Bus error

Tested all versions in tree and issue is present everywhere including git master.

Reproducible: Always

[Comment 1 matoro 2023-12-16 00:02:24 UTC]

Created attachment 879550 [details]
build.log and emerge --info

[Comment 2 Sam James 2023-12-16 01:41:51 UTC]

Please get a backtrace.

[Comment 3 Sam James 2023-12-16 01:42:01 UTC]

(In reply to Sam James from comment #2)
> Please get a backtrace.

(and/or ubsan bt)

[Comment 4 matoro 2023-12-16 02:10:24 UTC]

Created attachment 879555 [details]
bt full

Example backtrace (from 9999, a4d751b)

[Comment 5 matoro 2023-12-16 02:23:21 UTC]

UBSAN does catch it!

Reading command line arguments
Get file language for ./Units/parser-ruby.r/simple.rb.d/input.rb
        pattern: input.rb
                #candidates: 1
                        0: Ruby (extension: "rb")
                #candidates after sorting and filtering: 1
                        0: Ruby (extension: "rb")
OPENING ./Units/parser-ruby.r/simple.rb.d/input.rb as Ruby language file [new]
Initialize parser: Ruby
Initialize parser: RSpec
parsers/ruby.c:746:11: runtime error: member access within misaligned address 0x00015472f23c for type 'struct blockData', which requires 8 byte alignment
0x00015472f23c: note: pointer points here
  05 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
              ^ 
parsers/ruby.c:755:11: runtime error: member access within misaligned address 0x00015472f23c for type 'struct blockData', which requires 8 byte alignment
0x00015472f23c: note: pointer points here
  05 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
              ^ 
parsers/ruby.c:764:11: runtime error: member access within misaligned address 0x00015472f23c for type 'struct blockData', which requires 8 byte alignment
0x00015472f23c: note: pointer points here
  05 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
              ^

[Comment 6 matoro 2023-12-20 01:31:32 UTC]

Fixed in https://github.com/universal-ctags/ctags/pull/3883