From cf825fd80a6b3308abd7c0f9b32fdcf5d6565593 Mon Sep 17 00:00:00 2001
From: Brian Taylor <lbwnet@comcast.net>
Date: Sat, 16 May 2026 13:22:48 -0700
Subject: [PATCH] Fix memory leaks for paranoia_parallel. Tests with leaks:  
 examples/various/probe-i-dev.cir   examples/vdmos/100W.sp   multiple tests
 using OUTpBeginPlot, add_to_sourcepath

---
 src/frontend/inpc_probe.c | 10 +++++-----
 src/frontend/inpcom.c     |  1 +
 src/frontend/outitf.c     |  6 +++---
 src/maths/ni/niiter.c     |  1 +
 4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/src/frontend/inpc_probe.c b/src/frontend/inpc_probe.c
index 5a7a91f54..ddd1e4630 100644
--- a/src/frontend/inpc_probe.c
+++ b/src/frontend/inpc_probe.c
@@ -142,7 +142,7 @@ void inp_probe(struct card* deck)
     }
     /* don't free the wl_word, they belong to the cards */
     wltmp = probes;
-    while (wltmp) {
+    while (wltmp) { // Fix memory leak probe-i-dev.cir
         next_wl = wltmp->wl_next;
         tfree(wltmp); // Do not free the wl_word
         wltmp = next_wl;
@@ -194,7 +194,7 @@ void inp_probe(struct card* deck)
         if (!instname)
             continue;
         nghash_insert(instances, instname, card);
-        tfree(instname);
+        tfree(instname); // Fix memory leak probe-i-dev.cir
     }
 
     if (haveall || probeparams == NULL) {
@@ -893,7 +893,7 @@ void inp_probe(struct card* deck)
                 tmpcard = nghash_find(instances, instname);
                 if (!tmpcard) {
                     fprintf(stderr, "Warning: Could not find the instance line for %s,\n   .probe %s will be ignored\n", instname, wltmp->wl_word);
-                    tfree(instname);
+                    tfree(instname); // Fix memory leak probe-i-dev.cir
                     continue;
                 }
                 char* thisline = tmpcard->line;
@@ -929,7 +929,7 @@ void inp_probe(struct card* deck)
                 else if (err == 3) {
                     fprintf(stderr, "Warning: Number of nodes mismatch,\n   .probe %s will be ignored\n", wltmp->wl_word);
                 }
-                tfree(instname);
+                tfree(instname); // Fix memory leak probe-i-dev.cir
                 continue;
             }
             else if (!haveall) {
@@ -948,7 +948,7 @@ void inp_probe(struct card* deck)
 
     }
     if (probeparams) {
-        wl_free(probeparams);
+        wl_free(probeparams); // Fix memory leak probe-i-dev.cir
     }
     nghash_free(instances, NULL, NULL);
 }
diff --git a/src/frontend/inpcom.c b/src/frontend/inpcom.c
index 3551975ef..5943c8118 100644
--- a/src/frontend/inpcom.c
+++ b/src/frontend/inpcom.c
@@ -9944,6 +9944,7 @@ int add_to_sourcepath(const char* filepath, const char* path)
                 scan_new = next;
             }
             if (!addwl) {
+                wl_free(startwl);
                 wl_free(wl);
                 tfree(fpath);
                 return 0; // Not an error.
diff --git a/src/frontend/outitf.c b/src/frontend/outitf.c
index a59dc6030..b2ef4681e 100644
--- a/src/frontend/outitf.c
+++ b/src/frontend/outitf.c
@@ -153,11 +153,11 @@ OUTpBeginPlot(CKTcircuit *circuitPtr, JOB *analysisPtr,
                 "       is more than the DRAM memory available (%sB)!\n",
                 cmemrequ, n, ctimesteps, cmemavail);
             fprintf(stderr, "       Swapping data to SSD may slow down the simulation.\n");
-            tfree(cmemrequ);
-            tfree(cmemavail);
-            tfree(ctimesteps);
 #endif
         }
+        tfree(cmemrequ);
+        tfree(cmemavail);
+        tfree(ctimesteps);
     }
 
     return ret;
diff --git a/src/maths/ni/niiter.c b/src/maths/ni/niiter.c
index 85da8ecd7..9f06a62df 100644
--- a/src/maths/ni/niiter.c
+++ b/src/maths/ni/niiter.c
@@ -278,6 +278,7 @@ NIiter(CKTcircuit *ckt, int maxIter)
                     fprintf(stderr, "too many iterations without convergence: %d iter's (max iter == %d)\n",
                     iterno, maxIter);
 #endif
+                    FREE(errMsg);
                 }
                 FREE(OldCKTstate0);
                 return(E_ITERLIM);