The patch below adds an --error-exit option and uses it in the makefile. This avoids replacing the compiler with something that doesn't work at all due to compilation errors.

diff --git a/Makefile.am b/Makefile.am index af5853d..51372ad 100644 --- a/Makefile.am +++ b/Makefile.am @@ -104,7 +104,7 @@ polytemp.txt: $(POLYIMPORT) # This builds the compiler but does not update the files in the imports directory. # It then builds a version of poly containing the new compiler. compiler: all - ./poly $(BOOTSTRAP_OPTIONS) < mlsource/BuildExport.sml + ./poly $(BOOTSTRAP_OPTIONS) --error-exit < mlsource/BuildExport.sml $(MAKE)

reboot: compiler diff --git a/basis/FinalPolyML.sml b/basis/FinalPolyML.sml index 0480aba..651f573 100644 --- a/basis/FinalPolyML.sml +++ b/basis/FinalPolyML.sml @@ -250,6 +250,8 @@ local if ! useMarkupInOutput then prettyPrintWithIDEMarkup(stream, lineWidth) else PolyML.prettyPrint(stream, lineWidth)

+ val exitOnError = ref false + (* Top-level prompts. *) val prompt1 = ref "> " and prompt2 = ref "# ";

@@ -706,7 +708,10 @@ local fun handledLoop () : unit = ( (* Process a single top-level command. *) - readEvalPrint() handle _ => (); + readEvalPrint() handle _ => + if !exitOnError + then OS.Process.exit OS.Process.failure + else (); (* Exit if we've seen end-of-file or we're in the debugger and we've run "continue". *) if !endOfFile orelse exitLoop() then () @@ -873,6 +878,7 @@ local (* Generate mark-up in IDE code when printing if the option has been given on the command line. *) useMarkupInOutput := List.exists(fn s => s = "--with-markup") (CommandLine.arguments()); + exitOnError := List.exists(fn s => s = "--error-exit") (CommandLine.arguments()); topLevel false (globalNameSpace, fn _ => false) ) end diff --git a/basis/TopLevelPolyML.sml b/basis/TopLevelPolyML.sml index 405d5ae..0a18243 100644 --- a/basis/TopLevelPolyML.sml +++ b/basis/TopLevelPolyML.sml @@ -1121,6 +1121,7 @@ in print "--help Print this message and exit\n"; print "-q Suppress the start-up message\n"; print "--use FILE Executes 'use "FILE";' before the ML shell starts\n"; + print "--error-exit Exit shell on unhandled exception\n"; print "--with-markup Include extra mark-up information when printing\n"; print "--ideprotocol Run the IDE communications protocol\n"; print "\nRun time system arguments:\n";