--- /tmp/ruby-enumerable-statistics-2.0.1+dfsg-3g5llastb/debian/ruby-enumerable-statistics_2.0.1+dfsg-3_amd64.deb
+++ ruby-enumerable-statistics_2.0.1+dfsg-3_amd64.deb
├── file list
│ @@ -1,3 +1,3 @@
│  -rw-r--r--   0        0        0        4 2020-04-18 10:33:27.000000 debian-binary
│ --rw-r--r--   0        0        0     4520 2020-04-18 10:33:27.000000 control.tar.xz
│ --rw-r--r--   0        0        0   318460 2020-04-18 10:33:27.000000 data.tar.xz
│ +-rw-r--r--   0        0        0     4524 2020-04-18 10:33:27.000000 control.tar.xz
│ +-rw-r--r--   0        0        0   318468 2020-04-18 10:33:27.000000 data.tar.xz
├── control.tar.xz
│ ├── control.tar
│ │ ├── ./md5sums
│ │ │ ├── ./md5sums
│ │ │ │┄ Files differ
├── data.tar.xz
│ ├── data.tar
│ │ ├── ./usr/lib/x86_64-linux-gnu/rubygems-integration/2.7.0/extensions/x86_64-linux/2.7.0/enumerable-statistics-2.0.1/mkmf.log
│ │ │ @@ -119,15 +119,15 @@
│ │ │  11: 
│ │ │  12:   return !!argv[argc];
│ │ │  13: }
│ │ │  14: int t(void) { void ((*volatile p)()); p = (void ((*)()))rb_rational_plus; return !p; }
│ │ │  /* end */
│ │ │  
│ │ │  "gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-2.7.0 -I/usr/include/ruby-2.7.0/ruby/backward -I/usr/include/ruby-2.7.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2   -g -O2 -fdebug-prefix-map=/build/ruby2.7-JJWFdC/ruby2.7-2.7.0=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c  -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic     -lruby-2.7  -lm   -lc"
│ │ │ -/usr/bin/ld: /tmp/ccVV3fN6.o: in function `t':
│ │ │ +/usr/bin/ld: /tmp/ccMmC6gn.o: in function `t':
│ │ │  /build/ruby-enumerable-statistics-ZbTJUx/ruby-enumerable-statistics-2.0.1+dfsg/debian/ruby-enumerable-statistics/usr/lib/x86_64-linux-gnu/rubygems-integration/2.7.0/gems/enumerable-statistics-2.0.1/ext/enumerable/statistics/extension/conftest.c:15: undefined reference to `rb_rational_plus'
│ │ │  collect2: error: ld returned 1 exit status
│ │ │  checked program was:
│ │ │  /* begin */
│ │ │   1: #include "ruby.h"
│ │ │   2: 
│ │ │   3: /*top*/