> so I can induce the bug with an even longer string?  That is not a fix but
> a patch

and it is a patch and a possible fix

diff -ur csound5~/Engine/namedins.c csound5/Engine/namedins.c
--- csound5~/Engine/namedins.c	2012-04-11 21:16:06.000000000 +0200
+++ csound5/Engine/namedins.c	2012-04-11 21:16:26.000000000 +0200
@@ -469,7 +469,7 @@
 /* -------------------------------------------------------------------- */
 /* These functions replace the functionality of strsav() in rdorch.c.   */
 
-#define STRSPACE    (2000)               /* number of bytes in a buffer  */
+#define STRSPACE    (1000)               /* number of bytes in a buffer  */
 
 typedef struct strsav_t {
         struct strsav_t *nxt;           /* pointer to next structure    */
@@ -529,7 +529,7 @@
     n = (int) sizeof(struct strsav_t *) + (int) strlen(s) + 1;  /* n bytes */
     n = ((n + (int) sizeof(struct strsav_t *) - 1)  /* round up for alignment */
          / (int) sizeof(struct strsav_t *)) * (int) sizeof(struct strsav_t *);
-    if ((STRSAV_SPACE_->splim + n) > STRSAV_SPACE_->size) {
+    if ((STRSAV_SPACE_->splim + n) > (STRSAV_SPACE_->size = STRSPACE)) {
       STRSAV_SPACE  *sp;
       /* not enough space, allocate new buffer */
        if (UNLIKELY(n > STRSAV_SPACE_->size)) {
@@ -545,7 +545,7 @@
        else {
          sp = (STRSAV_SPACE*) mcalloc(csound, sizeof(STRSAV_SPACE));
          sp->sp =
-           (char*)mcalloc(csound, STRSAV_SPACE_->size = STRSPACE);
+           (char*)mcalloc(csound, STRSAV_SPACE_->size);
        }
        sp->prv = STRSAV_SPACE_;
        csound->strsav_space = sp;

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