Mercurial Mercurial > repos > isabelle / changeset
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | raw | gz | help
Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
tuned error;
authorwenzelm
Tue, 04 Oct 2016 18:26:26 +0200
changeset 64040 84f283385091
parent 64039 44660100931d
child 64041 fd454d9e97c4
tuned error;
src/Pure/Tools/build_history.scala file | annotate | diff | comparison | revisions 
--- a/src/Pure/Tools/build_history.scala	Tue Oct 04 18:09:23 2016 +0200
+++ b/src/Pure/Tools/build_history.scala	Tue Oct 04 18:26:26 2016 +0200
@@ -119,7 +119,10 @@
       val platform_64 = isabelle("getenv -b ISABELLE_PLATFORM64").check.out
       val platform_family = isabelle("getenv -b ISABELLE_PLATFORM_FAMILY").check.out
 
-      val polyml_home = Path.explode(isabelle("getenv -b ML_HOME").check.out).dir
+      val polyml_home =
+        try { Path.explode(isabelle("getenv -b ML_HOME").check.out).dir }
+        catch { case ERROR(msg) => error("Bad ML_HOME: " + msg) }
+
       def ml_home(platform: String): Path = polyml_home + Path.explode(platform)
 
       def err(platform: String): Nothing =
isabelle