Merge branch 'jk/asan-bonanza' into seen

Various issues detected by Asan have been corrected.

* jk/asan-bonanza:
  amend! Makefile: turn on NO_MMAP when building with ASan

Author: gitster

meson.build

@@ -1413,12 +1413,18 @@ if host_machine.system() == 'windows'
   libgit_c_args += '-DUSE_WIN32_MMAP'
 else
   checkfuncs += {
-    'mmap' : ['mmap.c'],
     # provided by compat/mingw.c.
     'unsetenv' : ['unsetenv.c'],
     # provided by compat/mingw.c.
     'getpagesize' : [],
   }
+
+  if get_option('b_sanitize').contains('address')
+    libgit_c_args += '-DNO_MMAP'
+    libgit_sources += 'compat/mmap.c'
+  else
+    checkfuncs += { 'mmap': ['mmap.c'] }
+  endif
 endif
 
 foreach func, impls : checkfuncs