Better error message, C contiguous check and remove error flag + tests

4 jobs for !109 with development/be-static-dynamic in 16 minutes and 5 seconds (queued for 1 second)
detached
Status Job ID Name Coverage
  Build
passed #131336
distcheck-linux-clang10-release

00:14:10

passed #131338
distcheck-linux-coverage

00:16:04

92.0%
passed #131337
distcheck-linux-gcc10-release

00:13:12

passed #131335
windows
windows-debug

00:03:41