diff --git a/man/rgbfix.1 b/man/rgbfix.1
index 1945c732..17a22184 100644
--- a/man/rgbfix.1
+++ b/man/rgbfix.1
@@ -23,7 +23,7 @@
 .Op Fl r Ar ram_size
 .Op Fl t Ar title_str
 .Op Fl W Ar warning
-.Op Ar
+.Ar
 .Sh DESCRIPTION
 The
 .Nm
@@ -41,7 +41,7 @@ and to have already populated whichever fields they don't specify using
 .Nm .
 .Pp
 The input
-.Ar asmfile
+.Ar file
 can be a path to a file, or
 .Cm \-
 to read from standard input.
diff --git a/man/rgblink.1 b/man/rgblink.1
index b36ad91d..af4ea585 100644
--- a/man/rgblink.1
+++ b/man/rgblink.1
@@ -50,7 +50,7 @@ option, which implies
 but also prohibits the use of banked VRAM.
 .Pp
 The input
-.Ar asmfile
+.Ar file
 can be a path to a file, or
 .Cm \-
 to read from standard input.
diff --git a/src/asm/fstack.cpp b/src/asm/fstack.cpp
index d3bbe04d..9c77d203 100644
--- a/src/asm/fstack.cpp
+++ b/src/asm/fstack.cpp
@@ -337,7 +337,7 @@ bool fstk_FileError(std::string const &path, char const *functionName) {
 		if (options.missingIncludeState == GEN_EXIT) {
 			verbosePrint(
 			    VERB_NOTICE,
-			    "Aborting (-MG) on `%s` file \"%s\": %s\n",
+			    "Aborting due to '-MG' on `%s` file \"%s\": %s\n",
 			    functionName,
 			    path.c_str(),
 			    strerror(errno)
diff --git a/src/asm/output.cpp b/src/asm/output.cpp
index 787bac43..94749399 100644
--- a/src/asm/output.cpp
+++ b/src/asm/output.cpp
@@ -159,15 +159,10 @@ static void writeRpn(std::vector<uint8_t> &rpnexpr, std::vector<uint8_t> const &
 		case RPN_SYM:
 			// The symbol name is always written expanded
 			sym = sym_FindExactSymbol(getSymName());
-			if (sym->isConstant()) {
-				rpnexpr[rpnptr++] = RPN_CONST;
-				value = sym->getConstantValue();
-			} else {
-				rpnexpr[rpnptr++] = RPN_SYM;
-				registerUnregisteredSymbol(*sym); // Ensure that `sym->ID` is set
-				value = sym->ID;
-			}
+			registerUnregisteredSymbol(*sym); // Ensure that `sym->ID` is set
+			value = sym->ID;
 
+			rpnexpr[rpnptr++] = RPN_SYM;
 			rpnexpr[rpnptr++] = value & 0xFF;
 			rpnexpr[rpnptr++] = value >> 8;
 			rpnexpr[rpnptr++] = value >> 16;
diff --git a/src/asm/symbol.cpp b/src/asm/symbol.cpp
index e6aeb42b..b77b5208 100644
--- a/src/asm/symbol.cpp
+++ b/src/asm/symbol.cpp
@@ -351,11 +351,8 @@ uint32_t Symbol::getConstantValue() const {
 	}
 
 	if (sym_IsPC(this)) {
-		if (!getSection()) {
-			error("PC has no value outside of a section");
-		} else {
-			error("PC does not have a constant value; the current section is not fixed");
-		}
+		assume(getSection()); // There's no way to reach here from outside of a section
+		error("PC does not have a constant value; the current section is not fixed");
 	} else {
 		error("`%s` does not have a constant value", name.c_str());
 	}
diff --git a/test/asm/abort-on-missing-incbin-slice.asm b/test/asm/abort-on-missing-incbin-slice.asm
new file mode 100644
index 00000000..396e9eb2
--- /dev/null
+++ b/test/asm/abort-on-missing-incbin-slice.asm
@@ -0,0 +1,3 @@
+section "test", rom0
+incbin "incbin-mg-noexist.bin", 0, 2
+println "never reached"
diff --git a/test/asm/abort-on-missing-incbin-slice.flags b/test/asm/abort-on-missing-incbin-slice.flags
new file mode 100644
index 00000000..864229c4
--- /dev/null
+++ b/test/asm/abort-on-missing-incbin-slice.flags
@@ -0,0 +1 @@
+-MG
diff --git a/test/asm/abort-on-missing-incbin.asm b/test/asm/abort-on-missing-incbin.asm
new file mode 100644
index 00000000..4f837216
--- /dev/null
+++ b/test/asm/abort-on-missing-incbin.asm
@@ -0,0 +1,3 @@
+section "test", rom0
+incbin "incbin-mg-noexist.bin", 2
+println "never reached"
diff --git a/test/asm/abort-on-missing-incbin.flags b/test/asm/abort-on-missing-incbin.flags
new file mode 100644
index 00000000..864229c4
--- /dev/null
+++ b/test/asm/abort-on-missing-incbin.flags
@@ -0,0 +1 @@
+-MG
diff --git a/test/asm/deprecated-functions.asm b/test/asm/deprecated-functions.asm
new file mode 100644
index 00000000..bd574431
--- /dev/null
+++ b/test/asm/deprecated-functions.asm
@@ -0,0 +1,15 @@
+opt Wno-unmapped-char
+def s equs "Hello world!"
+
+assert strin(#s, "l") == strfind(#s, "l") + 1
+assert strrin(#s, "l") == strrfind(#s, "l") + 1
+
+assert !strcmp(strsub(#s, 7), strslice(#s, 6))
+assert !strcmp(strsub(#s, 7, 5), strslice(#s, 6, 11))
+assert !strcmp(strsub(#s, strlen(#s), 1), strslice(#s, strlen(#s) - 1, strlen(#s)))
+assert !strcmp(strsub(#s, 7, 999), strslice(#s, 6, 999))
+
+assert !strcmp(charsub(#s, 12), strchar(#s, 11))
+assert !strcmp(charsub(#s, -1), strchar(#s, -1))
+assert !strcmp(charsub(#s, -999), strchar(#s, -999))
+assert !strcmp(charsub(#s, 999), strchar(#s, 999))
diff --git a/test/asm/deprecated-functions.err b/test/asm/deprecated-functions.err
new file mode 100644
index 00000000..425f6488
--- /dev/null
+++ b/test/asm/deprecated-functions.err
@@ -0,0 +1,32 @@
+warning: `STRIN` is deprecated; use 0-indexed `STRFIND` instead [-Wobsolete]
+    at deprecated-functions.asm(4)
+warning: `STRRIN` is deprecated; use 0-indexed `STRRFIND` instead [-Wobsolete]
+    at deprecated-functions.asm(5)
+warning: `STRSUB` is deprecated; use 0-indexed `STRSLICE` instead [-Wobsolete]
+    at deprecated-functions.asm(7)
+warning: `STRSUB` is deprecated; use 0-indexed `STRSLICE` instead [-Wobsolete]
+    at deprecated-functions.asm(8)
+warning: `STRSUB` is deprecated; use 0-indexed `STRSLICE` instead [-Wobsolete]
+    at deprecated-functions.asm(9)
+warning: `STRSUB` is deprecated; use 0-indexed `STRSLICE` instead [-Wobsolete]
+    at deprecated-functions.asm(10)
+warning: STRSUB: Length too big: 999 [-Wbuiltin-args]
+    at deprecated-functions.asm(10)
+warning: STRSLICE: Stop index 999 is past the end of the string [-Wbuiltin-args]
+    at deprecated-functions.asm(10)
+warning: `CHARSUB` is deprecated; use 0-indexed `STRCHAR` instead [-Wobsolete]
+    at deprecated-functions.asm(12)
+warning: `CHARSUB` is deprecated; use 0-indexed `STRCHAR` instead [-Wobsolete]
+    at deprecated-functions.asm(13)
+warning: `CHARSUB` is deprecated; use 0-indexed `STRCHAR` instead [-Wobsolete]
+    at deprecated-functions.asm(14)
+warning: CHARSUB: Position starts at 1 [-Wbuiltin-args]
+    at deprecated-functions.asm(14)
+warning: STRCHAR: Index starts at 0 [-Wbuiltin-args]
+    at deprecated-functions.asm(14)
+warning: `CHARSUB` is deprecated; use 0-indexed `STRCHAR` instead [-Wobsolete]
+    at deprecated-functions.asm(15)
+warning: CHARSUB: Position 999 is past the end of the string [-Wbuiltin-args]
+    at deprecated-functions.asm(15)
+warning: STRCHAR: Index 999 is past the end of the string [-Wbuiltin-args]
+    at deprecated-functions.asm(15)
diff --git a/test/asm/errors-after-missing-include.asm b/test/asm/errors-after-missing-include.asm
index fae85b9e..901e3e2e 100644
--- a/test/asm/errors-after-missing-include.asm
+++ b/test/asm/errors-after-missing-include.asm
@@ -4,7 +4,9 @@ PUSHS
 SECTION "test", WRAM0
 UNION
 INCLUDE "does not exist"
+/*
 ENDU
 POPS
 POPO
 POPC
+*/
diff --git a/test/asm/readfile-max-mg.asm b/test/asm/readfile-max-mg.asm
new file mode 100644
index 00000000..92e961a3
--- /dev/null
+++ b/test/asm/readfile-max-mg.asm
@@ -0,0 +1,2 @@
+def s equs readfile("readfile-mg-noexist.inc", $ff)
+println "unreached"
diff --git a/test/asm/readfile-max-mg.flags b/test/asm/readfile-max-mg.flags
new file mode 100644
index 00000000..864229c4
--- /dev/null
+++ b/test/asm/readfile-max-mg.flags
@@ -0,0 +1 @@
+-MG
diff --git a/test/asm/readfile-mg.asm b/test/asm/readfile-mg.asm
new file mode 100644
index 00000000..f6575c2f
--- /dev/null
+++ b/test/asm/readfile-mg.asm
@@ -0,0 +1,2 @@
+def s equs readfile("readfile-mg-noexist.inc")
+println "unreached"
diff --git a/test/asm/readfile-mg.flags b/test/asm/readfile-mg.flags
new file mode 100644
index 00000000..864229c4
--- /dev/null
+++ b/test/asm/readfile-mg.flags
@@ -0,0 +1 @@
+-MG
diff --git a/test/link/pipeline/a.asm b/test/link/pipeline/a.asm
new file mode 100644
index 00000000..04bd516f
--- /dev/null
+++ b/test/link/pipeline/a.asm
@@ -0,0 +1,10 @@
+section "test", rom0
+db 1, 4, 9, 16
+
+section "entrypoint", rom0[$100]
+ld b, b
+jp Start
+
+section "start", rom0[$150]
+Start::
+jp Start
diff --git a/test/link/pipeline/out.gb b/test/link/pipeline/out.gb
new file mode 100644
index 00000000..31402bec
Binary files /dev/null and b/test/link/pipeline/out.gb differ
diff --git a/test/link/test.sh b/test/link/test.sh
index 7a24c3d1..10af49c9 100755
--- a/test/link/test.sh
+++ b/test/link/test.sh
@@ -26,6 +26,7 @@ rescolors="$(tput op)"
 
 RGBASM=../../rgbasm
 RGBLINK=../../rgblink
+RGBFIX=../../rgbfix
 
 startTest () {
 	echo "${bold}${green}${test} assembling...${rescolors}${resbold}"
@@ -71,7 +72,7 @@ tryCmpRomSize () {
 }
 
 rgblinkQuiet () {
-	out="$(env $RGBLINK -Weverything -B collapse "$@")" || return $?
+	out="$(env "$RGBLINK" -Weverything -B collapse "$@")" || return $?
 	if [[ -n "$out" ]]; then
 		echo "$bold${red}Linking shouldn't produce anything on stdout!${rescolors}${resbold}"
 		false
@@ -251,6 +252,16 @@ tryDiff "$test"/out.err "$outtemp"
 tryCmp "$test"/out.gb "$gbtemp"
 evaluateTest
 
+test="pipeline"
+startTest
+continueTest
+("$RGBASM" -Weverything -B collapse -o - - | \
+ "$RGBLINK" -Weverything -B collapse -o - - | \
+ "$RGBFIX" -Weverything -v -p 0xff -) < "$test"/a.asm > "$gbtemp"
+# This test does not trim its output with 'dd' because it needs to verify the correct output size
+tryCmp "$test"/out.gb "$gbtemp"
+evaluateTest
+
 test="same-consts"
 startTest
 "$RGBASM" -o "$otemp" "$test"/a.asm