FEDORA-2019-5a2264794a

This release fixes an undesired closing of an IPC pipe that already has a desired descriptor, fixes reporting a line number for non-terminated prototypes, first eof() return value, a crash when compiling a malformed form, clobbering local variables on a long jump, a mismatch with a case-insesitive regular expression on a text with ligatures, obtaining an interpreter path if procfs is not mounted, a crash when parsing #line directives with large numbers in eval, setting magic when changing $^R, a race when loading XS modules, and extending a stack in the Perl parser. It also improves GDBM and C++ tests.